Antenna calibration using two-way communications

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a first set of reference signals, wherein receiving the first set of reference signals comprises receiving each reference signal using a respective antenna element of the first network node. The first network node may transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node. The first network node may receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals. Numerous other aspects are described.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for antenna calibration using two-way communications.

BACKGROUND

SUMMARY

Some aspects described herein relate to a first network node for wireless communication. The first network node may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node. The one or more processors may be configured to transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the set of antenna elements of the first network node. The one or more processors may be configured to receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to a second network node of a first network node and the second network node for wireless communication. The second network node of a first network node and the second network node may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights. The one or more processors may be configured to receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node. The one or more processors may be configured to transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to a method of wireless communication performed by a first network node. The method may include receiving, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node. The method may include transmitting, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the set of antenna elements of the first network node. The method may include receiving, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to a method of wireless communication performed by a second network node of a first network node and a second network node. The method may include transmitting, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights. The method may include receiving, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node. The method may include transmitting, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a first network node. The set of instructions, when executed by one or more processors of the first network node, may cause the first network node to receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node. The set of instructions, when executed by one or more processors of the first network node, may cause the first network node to transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the set of antenna elements of the first network node. The set of instructions, when executed by one or more processors of the first network node, may cause the first network node to receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a first network node and the second network node. The set of instructions, when executed by one or more processors of the first network node and the second network node, may cause the first network node and the second network node to transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights. The set of instructions, when executed by one or more processors of the first network node and the second network node, may cause the first network node and the second network node to receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node. The set of instructions, when executed by one or more processors of the first network node and the second network node, may cause the first network node and the second network node to transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving, from a network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the apparatus. The apparatus may include means for transmitting, to the network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the set of antenna elements of the apparatus. The apparatus may include means for receiving, from the network node, an estimation report comprising estimation information associated with the second set of reference signals.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting, to a network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights. The apparatus may include means for receiving, from the network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the network node. The apparatus may include means for transmitting, to the network node, an estimation report comprising estimation information associated with the second set of reference signals.

DETAILED DESCRIPTION

In some aspects, a first network node may include a communication manager140or a communication manager150. As described in more detail elsewhere herein, the communication manager140or150may receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node; transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node; and receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

In some aspects, the second network node may include a communication manager140or150. As described in more detail elsewhere herein, the communication manager140or150may transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights; receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node; and transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals. Additionally, or alternatively, the communication manager140or150may perform one or more other operations described herein.

In some aspects, a first network node includes means for receiving, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node; means for transmitting, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node; and/or means for receiving, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals. In some aspects, the means for the first network node to perform operations described herein may include, for example, one or more of communication manager150, transmit processor220, TX MIMO processor230, modem232, antenna234, MIMO detector236, receive processor238, controller/processor240, memory242, or scheduler246. In some aspects, the means for the first network node to perform operations described herein may include, for example, one or more of communication manager140, antenna252, modem254, MIMO detector256, receive processor258, transmit processor264, TX MIMO processor266, controller/processor280, or memory282.

In some aspects, a second network node of a first network node and a second network node includes means for transmitting, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights; means for receiving, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node; and/or means for transmitting, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals. In some aspects, the means for the second network node to perform operations described herein may include, for example, one or more of communication manager150, transmit processor220, TX MIMO processor230, modem232, antenna234, MIMO detector236, receive processor238, controller/processor240, memory242, or scheduler246. In some aspects, the means for the second network node to perform operations described herein may include, for example, one or more of communication manager140, antenna252, modem254, MIMO detector256, receive processor258, transmit processor264, TX MIMO processor266, controller/processor280, or memory282.

FIG.4is a diagram illustrating an example400of two-way communications between a first network node402and a second network node404, in accordance with the present disclosure. The first network node402and the second network node404may communicate using millimeter wave (mmW) signals.

For mmW communications, beamforming is used to coherently combine energy and overcome high path losses at higher frequencies. To perform beamforming, beamforming weights are computed for signaling. Beamforming weights can be computed at antennas406(shown as “Antenna 1,” “Antenna 2,” . . . , “Antenna N”) of the second network node404in a reception mode. The same weights cannot be reused for transmission from the antennas406of the first network node402since the RF pathways and/or circuitry are different. For example, as shown inFIG.4, for reception, each antenna406of the first network node402can be associated with a low noise amplifier (LNA)408, a reception (Rx) phase shifter410, and a reception variable gain amplifier (Rx VGA)412. For transmission, each antenna406of the first network node402can be associated with a transmission VGA414, the phase shifter410, and a transmission power amplifier (PA)416.

For reception, a combiner418can combine received signals associated with each antenna406and a mixer420can mix the combined signals. The mixed received signals can be converted, using an analog-to-digital converter (ADC) portion of an ADC/digital-to-analog converter (DAC) component422from the analog domain to the digital domain before providing the converted digital signal to a baseband processor (π)424for further processing. For transmission, a DAC portion of the ADC/DAC component422converts a signal from the digital domain to the analog domain, provides the converted analog signal to the mixer420and the combiner418, which separates the mixed signal into individual respective paths corresponding to the antennas406.

In some cases, the first network node402can be calibrated by calibrating each antenna and each component for transmission and reception modes separately in a pre-mission mode operation. A pre-mission mode operation, which may be referred to as an “off-line” operation, is an operation that is performed before a network node is deployed for communication in a network. For example, calibration adjustments can be determined for sample test equipment in a chamber for one set of test settings, and the adjustments can be reused across all UEs of the same class based on some pre-configured adjustment operations. However, the number of test settings can be prohibitively large (e.g., temperature variations, frequency variations, and/or power levels, among other examples). Additionally, not all system parameters can be explored in offline calibration efforts because online calibration requires the use of dead periods where the second network node404does not transmit anything to the first network node402while the first network node402receives and transmits signals to and from itself.

Some aspects of the techniques and apparatuses described herein provide for antenna calibration using two-way communications. For example, in some aspects, the first network node402may receive, from the second network node404, a first set of reference signals. Each reference signal of the first set of reference signals may correspond to a respective beam weight of a first set of beam weights. Receiving the first set of reference signals may include receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node402. The first network node402may transmit, to the second network node404, a second set of reference signals. The second set of reference signals may be based on the first set of reference signals, and each reference signal of the second set of reference signals may be associated with an antenna element of the plurality of antenna elements of the first network node402. The first network node402may receive, from the second network node404, an estimation report comprising estimation information associated with the second set of reference signals.

In this way, the second network node404may continue to perform transmissions to the first network node402and calibration may be performed in an opportunistic manner such as, for example, when synchronization signal and physical broadcast channel blocks (SSBs) and/or uplink grants are available. Thus, some aspects of the techniques described herein may facilitate allowing two-way communications to continue as calibration is performed. In this manner, system parameter changes that require calibration parameter adjustments may be performed online.

FIG.5is a diagram illustrating an example500of antenna calibration using two-way communications, in accordance with the present disclosure. As shown inFIG.5, a network node502and a network node504may communicate with one another. The network node502and the network node504may communicate using millimeter wave signals. In some aspects, the network node502may be similar to the first network node402and the network node504may be similar to the second network node404. In some aspects, the network node404may be a UE (e.g., UE120depicted inFIGS.1and2). In some aspects, the network node402may be referred to as a first network node and the network node404may be referred to as a second network node. The network node402and the network node404may communicate using signals associated with carrier frequencies corresponding to the millimeter band or a higher frequency band than the millimeter band.

As shown by reference number506, the network node502may receive, from the network node504, a first set of reference signals. Each reference signal of the first set of reference signals may correspond to a respective beam weight of a first set of beam weights. The network node502may receive the first set of reference signals by receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the network node502.

As shown by reference number508, the network node502may determine the set of estimated phases, θ*i, associated with the first set of reference signals. The estimated phases θ*imay be determined using any number of different procedures and/or algorithms configured for determining estimated phases.

As shown by reference number510, the network node502may transmit, to the network node504, a second set of reference signals. The second set of reference signals may be based on the first set of reference signals, and each reference signal of the second set of reference signals may be associated with an antenna element of the plurality of antenna elements of the first network node. For example, the network node502may transmit the second set of reference signals using a set, fT, of beamforming weights based on the set of estimated phases, θ*i, associated with the first set of reference signals.

As a simplified example, a noise-free reception at an i-th antenna of the network node502may be represented as:

yR,i=αi·ej⁡(θi+θh,i+θMR,i+θR,i),
where θh,i=the phase of the channel impulse response at the i-th antenna in reception mode, θMR,i=the phase of the mixer and the ADC in the i-th receive path, θR,i=the phase of all other RF components in the i-th path (e.g., LNAs, couplers, filters, and/or VGAs, among other examples), θi=the phase to which the phase shifter at the i-th antenna in reception mode is set, αi=the gain of all RF components (including the mixer), the channel, and the phase shifter in the i-th reception path, and Θi=the set of phase shifter quantizations possible at i-th antenna. A beamforming component of the network node502(e.g., at least a portion of the reception component802depicted inFIG.8) in reception mode may be configured with beamforming weights:

Similarly, a noise-free transmission at the i-th antenna of the network node502may be represented as:

yT,i=α⁢βi·ej⁡(ϕi+θh,i+θMT,i+θT,i),
where θh,i=the phase of the channel impulse response at the i-th antenna in transmission mode (e.g., as a result of channel reciprocity conditions associated with time division duplexing (TDD) communications), θMT,i=the phase of the mixer and the DAC in the i-th transmit path, θT,i=the phase of all other RF components in the i-th path, ϕi=the phase to which the phase shifter, at the i-th antenna in reception mode, is set, and βi=the gain of all the RF components, the channel, and the phase shifter in the i-th transmission path. A beamforming component of the network node502(e.g., at least a portion of the reception component802depicted inFIG.8) in transmission mode may be configured with beamforming weights:

fT=1Nr·[ej⁢θ1*⋮ej⁢θNr*].
In general, θT,i≠θR,i, and θMT,i# θMR,i(e.g., due to the use of different sets of RF components for the transmission mode versus the reception mode).

As shown by reference number512, the network node504may transmit, and the network node502may receive, an estimation report including estimation information associated with the second set of reference signals. The estimation information may include an estimated signal, an estimated channel, and/or estimated beamforming weights, among other examples. As shown by reference number514, the network node502may determine a set of calibration adjustment coefficients, zi, corresponding to the plurality of antenna elements of the network node502. The network node502may determine the set of calibration adjustment coefficients based at least in part on the first set of reference signals and the second set of reference signals.

For example, in some aspects, for any choice of θ*iand ϕi, the corresponding calibration adjustment coefficient may be given by:

As shown by reference number516, the network node502may transmit, to the network node504, a communication signal. In some aspects, the network node502may transmit the communication signal based on a set fTof beamforming weights:

According to some aspects, ϕi=θ*i+∠zi,trainZ*1,trainmay produce an effective beamforming result since, barring a common phase factor at all antennas of the network node502, the effective phases seen in the transmission mode (over the transmission path) are the same as those in the reception mode over the reception path (e.g., having components that are optimized and/or synchronized for phase coherence subject to phase shifter constraints). For example, at a first antenna (e.g., antenna 1) of the network node502, the transmission signal may be represented as:

yT,1=β1·ej⁡(ϕ1+θh,1+θMT,1+θT,1)=β1·ej⁡(θ1*+θh,1+θMT,1+θT,1)=β1·ej⁡(θ1*+θh,1+θMR,1+θR,1)·e-j⁡(ΔθMRT,1+ΔθRT,1).
Similarly, at a second antenna (e.g., antenna 2) of the network node502, the transmission signal may be represented as:

FIG.6is a diagram illustrating an example process600performed, for example, by a first network node, in accordance with the present disclosure. Example process600is an example where the first network node (e.g., network node502) performs operations associated with antenna calibration using two-way communications.

As shown inFIG.6, in some aspects, process600may include receiving, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node (block610). For example, the first network node (e.g., using communication manager808and/or reception component802, depicted inFIG.8) may receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node, as described above.

As further shown inFIG.6, in some aspects, process600may include transmitting, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with at least one antenna element of the plurality of antenna elements of the first network node (block620). For example, the first network node (e.g., using communication manager808and/or transmission component804, depicted inFIG.8) may transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node, as described above.

As further shown inFIG.6, in some aspects, process600may include receiving, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals (block630). For example, the first network node (e.g., using communication manager808and/or reception component802, depicted inFIG.8) may receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals, as described above.

In a first aspect, process600includes determining a set of calibration adjustment coefficients, corresponding to the plurality of antenna elements of the first network node, based at least in part on the first set of reference signals and the second set of reference signals.

In a second aspect, alone or in combination with the first aspect, transmitting the second set of reference signals comprises transmitting the second set of reference signals based at least in part on the set of calibration adjustment coefficients. In a third aspect, alone or in combination with one or more of the first and second aspects, the first network node comprises a user equipment. In a fourth aspect, alone or in combination with one or more of the first through third aspects, the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device. In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the first set of reference signals comprise signals associated with carrier frequencies corresponding to the millimeter band or a higher frequency band than the millimeter band.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights. In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the second network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array. In an eighth aspect, alone or in combination with the seventh aspect, process600includes receiving a third set of reference signals using the antenna array, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

In a ninth aspect, alone or in combination with the seventh aspect, the first beam weight is associated with the first antenna element based at least in part on a configured order of beams. In a tenth aspect, alone or in combination with the seventh aspect, the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration. In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, receiving the first set of reference signals comprises receiving a first reference signal of the first set of reference signals before transmission of a first reference signal of the second set of reference signals, and receiving a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission of a second reference signal of the second set of reference signals.

In a twelfth aspect, alone or in combination with one or more of the first through tenth aspects, receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals. In a thirteenth aspect, alone or in combination with one or more of the first through tenth aspects, receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signals.

In a fourteenth aspect, alone or in combination with one or more of the first through tenth aspects or thirteenth aspects, receiving the first set of reference signals comprises receiving, using a first antenna element of the plurality of antenna elements of the first network node, a first reference signal of the first set of reference signals before transmission, using the first antenna element, of a first reference signal of the second set of reference signals, receiving, using a second antenna element of the plurality of antenna elements of the first network node, a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission, using the second antenna element, of a second reference signal of the second set of reference signals, receiving, using the first antenna element, a first reference signal of a third set of reference signals before transmission, using the first antenna element, of a first reference signal of a fourth set of reference signals, and receiving, using a third antenna element of the plurality of antenna elements, a third reference signal of the first set of reference signals after transmission of the first reference signal of the fourth set of reference signals and before transmission, using the third antenna element, of a third reference signal of the second set of reference signals.

FIG.7is a diagram illustrating an example process700performed, for example, by a second network node of a first network node and the second network node, in accordance with the present disclosure. Example process700is an example where the second network node (e.g., second network node504) performs operations associated with antenna calibration using two-way communications.

As shown inFIG.7, in some aspects, process700may include transmitting, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights (block710). For example, the second network node (e.g., using communication manager808and/or transmission component804, depicted inFIG.8) may transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, as described above.

As further shown inFIG.7, in some aspects, process700may include receiving, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node (block720). For example, the second network node (e.g., using communication manager808and/or reception component802, depicted inFIG.8) may receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node, as described above.

As further shown inFIG.7, in some aspects, process700may include transmitting, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals (block730). For example, the second network node (e.g., using communication manager808and/or transmission component804, depicted inFIG.8) may transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals, as described above.

In a first aspect, the first network node comprises a user equipment. In a second aspect, alone or in combination with the first aspect, the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device. In a third aspect, alone or in combination with one or more of the first and second aspects, wherein the second set of reference signals comprise signals associated with carrier frequencies corresponding to the millimeter band or a higher frequency band than the millimeter band.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights. In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the first network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array. In a sixth aspect, alone or in combination with the fifth aspect, process700includes receiving a third set of reference signals, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

In a seventh aspect, alone or in combination with one or more of the fifth through sixth aspects, the first beam weight is associated with the first antenna element based at least in part on a configured order of beams. In an eighth aspect, alone or in combination with one or more of the fifth through seventh aspects, the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration. In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, receiving the first set of reference signals comprises receiving a first reference signal of the first set of reference signals before transmission of a first reference signal of the second set of reference signals, and receiving a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission of a second reference signal of the second set of reference signals.

In a tenth aspect, alone or in combination with one or more of the first through eighth aspects, receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals. In an eleventh aspect, alone or in combination with one or more of the first through eighth aspects, receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signal.

The reception component802may receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node. The transmission component804may transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node. The reception component802may receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

The communication manager808and/or the determination component810may determine a set of calibration adjustment coefficients, corresponding to the plurality of antenna elements of the first network node, based at least in part on the first set of reference signals and the second set of reference signals. In some aspects, the communication manager808may include one or more antennas, a modem, a controller/processor, a memory, or a combination thereof, of the UE and/or the network node described in connection withFIG.2. In some aspects, the communication manager808may include the reception component802and/or the transmission component804. In some aspects, the communication manager808may be, be similar to, include, or be included in, the communication manager140and/or the communication manager150, depicted inFIGS.1and2. In some aspects, the determination component810may include one or more antennas, a modem, a controller/processor, a memory, or a combination thereof, of the UE and/or the network node described in connection withFIG.2. In some aspects, the determination component810may include the reception component802and/or the transmission component804.

The reception component802may receive a third set of reference signals using the antenna array, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

The transmission component804may transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights. The reception component802may receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node. The transmission component804may transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals.

The reception component802may receive a third set of reference signals, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

Aspect 1: A method of wireless communication performed by a first network node, comprising: receiving, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node; transmitting, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with at least one antenna element of the plurality of antenna elements of the first network node; and receiving, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals.

Aspect 2: The method of Aspect 1, further comprising determining a set of calibration adjustment coefficients, corresponding to the plurality of antenna elements of the first network node, based at least in part on the first set of reference signals and the second set of reference signals.

Aspect 3: The method of Aspect 2, wherein transmitting the second set of reference signals comprises transmitting the second set of reference signals based at least in part on the set of calibration adjustment coefficients.

Aspect 4: The method of any of Aspects 1-3, wherein the first network node comprises a user equipment.

Aspect 5: The method of any of Aspects 1-4, wherein the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device.

Aspect 6: The method of any of Aspects 1-5, wherein the first set of reference signals comprise signals associated with carrier frequencies corresponding to a millimeter band or a higher frequency band than the millimeter band.

Aspect 7: The method of any of Aspects 1-6, wherein a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights.

Aspect 8: The method of any of Aspects 1-3, wherein the second network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array.

Aspect 9: The method of Aspect 8, further comprising receiving a third set of reference signals using the antenna array, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

Aspect 10: The method of Aspect 8, wherein the first beam weight is associated with the first antenna element based at least in part on a configured order of beams.

Aspect 11: The method of Aspect 8, wherein the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration.

Aspect 12: The method of any of Aspects 1-11, wherein receiving the first set of reference signals comprises: receiving a first reference signal of the first set of reference signals before transmission of a first reference signal of the second set of reference signals; and receiving a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission of a second reference signal of the second set of reference signals.

Aspect 13: The method of any of Aspects 1-11, wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals.

Aspect 14: The method of any of Aspects 1-11, wherein receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signals.

Aspect 15: The method of any of Aspects 1-11 or 14, wherein receiving the first set of reference signals comprises: receiving, using a first antenna element of the plurality of antenna elements of the first network node, a first reference signal of the first set of reference signals before transmission, using the first antenna element, of a first reference signal of the second set of reference signals; receiving, using a second antenna element of the plurality of antenna elements of the first network node, a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission, using the second antenna element, of a second reference signal of the second set of reference signals; receiving, using the first antenna element, a first reference signal of a third set of reference signals before transmission, using the first antenna element, of a first reference signal of a fourth set of reference signals; and receiving, using a third antenna element of the plurality of antenna elements, a third reference signal of the first set of reference signals after transmission of the first reference signal of the fourth set of reference signals and before transmission, using the third antenna element, of a third reference signal of the second set of reference signals.

Aspect 16: A method of wireless communication performed by a second network node of a first network node and a second network node, the method comprising: transmitting, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights; receiving, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node; and transmitting, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals.

Aspect 17: The method of Aspect 16, wherein the first network node comprises a user equipment.

Aspect 18: The method of either of Aspects 16 or 17, wherein the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device.

Aspect 19: The method of any of Aspects 16-18, wherein the second set of reference signals comprise signals associated with carrier frequencies corresponding to a millimeter band or a higher frequency band than the millimeter band.

Aspect 20: The method of any of Aspects 16-19, wherein a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights.

Aspect 21: The method of any of Aspects 16-20, wherein the first network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array.

Aspect 22: The method of Aspect 21, further comprising receiving a third set of reference signals, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element.

Aspect 23: The method of either of Aspects 21 or 22, wherein the first beam weight is associated with the first antenna element based at least in part on a configured order of beams.

Aspect 24: The method of any of Aspects 21-23, wherein the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration.

Aspect 25: The method of any of Aspects 16-24, wherein receiving the first set of reference signals comprises: receiving a first reference signal of the first set of reference signals before transmission of a first reference signal of the second set of reference signals; and receiving a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission of a second reference signal of the second set of reference signals.

Aspect 26: The method of any of Aspects 16-24, wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals.

Aspect 27: The method of any of Aspects 16-24, wherein receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signal.