Patent ID: 11910326
Assignee: QUALCOMM INCORPORATED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of reducing sub-band full duplex (SBFD) user equipment (UE)-to-UE interference, comprising:
during a SBFD slot at a downlink (DL) UE in which the DL UE transmits no uplink (UL) signals and in which an UL UE transmits no DL signals:
receiving a radio frequency (RF) signal that includes a DL signal occupying a first sub-band of a slot frequency band for the SBFD slot and that further includes an uplink (UL) signal from the UL UE, the UL signal occupying a second sub-band of the slot frequency band, wherein the first sub-band comprises a lower sub-band and an upper sub-band of the slot frequency band and the second sub-band comprises a central sub-band of the slot frequency band, the lower sub-band being separated in frequency from the upper sub-band by the central sub-band;
down converting the RF signal in frequency to form a baseband signal that includes a down converted version of the DL signal and a down converted version of the UL signal;
high-pass filtering the baseband signal to pass the down converted version of the DL signal and to substantially attenuate the down converted version of the UL signal;
detecting that the UL signal is causing interference at the DL UE; and
transmitting a message from the DL UE to a base station to request that the base station transmit a command to the UL UE to adjust a power of the UL signal to reduce the interference.