A transceiver circuit, comprising: an antenna; a receiver RF chain configured to receive a receiver RF signal from the antenna; a transmitter RF chain configured to transmit a transmitter RF signal to the antenna; a frequency synthesizer configured to generate an oscillator signal; and a controller configured to: before causing the transmitter RF chain to transmit a first initiation signal, and, before causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a first working frequency; cause the transmitter RF chain to transmit, at the first working frequency, the first initiation signal to another transceiver circuit via the antenna, wherein the first initiation signal is part of a first signal exchange between the transceiver circuit and the other transceiver circuit; cause the receiver RF chain to receive the first reflection signal from the other transceiver circuit via the antenna at the first working frequency, wherein the first reflection signal is part of the first signal exchange; down convert the first reflection signal to a first intermediate frequency signal at a non-zero intermediate frequency; after causing the transmitter RF chain to transmit the first initiation signal, and, after causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a second working frequency, wherein the second working frequency is not equal to the first working frequency; cause the frequency synthesizer to continuously generate the oscillator signal at the first working frequency until the causing of the frequency synthesizer to generate the oscillator signal at the second working frequency; and determine a range estimate to the other transceiver circuit based on a phase of the first initiation signal and on a phase of the first reflection signal. an antenna; a receiver RF chain configured to receive a receiver RF signal from the antenna; a transmitter RF chain configured to transmit a transmitter RF signal to the antenna; a frequency synthesizer configured to generate an oscillator signal; and a controller configured to: before causing the transmitter RF chain to transmit a first initiation signal, and, before causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a first working frequency; cause the transmitter RF chain to transmit, at the first working frequency, the first initiation signal to another transceiver circuit via the antenna, wherein the first initiation signal is part of a first signal exchange between the transceiver circuit and the other transceiver circuit; cause the receiver RF chain to receive the first reflection signal from the other transceiver circuit via the antenna at the first working frequency, wherein the first reflection signal is part of the first signal exchange; down convert the first reflection signal to a first intermediate frequency signal at a non-zero intermediate frequency; after causing the transmitter RF chain to transmit the first initiation signal, and, after causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a second working frequency, wherein the second working frequency is not equal to the first working frequency; cause the frequency synthesizer to continuously generate the oscillator signal at the first working frequency until the causing of the frequency synthesizer to generate the oscillator signal at the second working frequency; and determine a range estimate to the other transceiver circuit based on a phase of the first initiation signal and on a phase of the first reflection signal. before causing the transmitter RF chain to transmit a first initiation signal, and, before causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a first working frequency; cause the transmitter RF chain to transmit, at the first working frequency, the first initiation signal to another transceiver circuit via the antenna, wherein the first initiation signal is part of a first signal exchange between the transceiver circuit and the other transceiver circuit; cause the receiver RF chain to receive the first reflection signal from the other transceiver circuit via the antenna at the first working frequency, wherein the first reflection signal is part of the first signal exchange; down convert the first reflection signal to a first intermediate frequency signal at a non-zero intermediate frequency; after causing the transmitter RF chain to transmit the first initiation signal, and, after causing the receiver RF chain to receive the first reflection signal, cause the frequency synthesizer to generate the oscillator signal at a second working frequency, wherein the second working frequency is not equal to the first working frequency; cause the frequency synthesizer to continuously generate the oscillator signal at the first working frequency until the causing of the frequency synthesizer to generate the oscillator signal at the second working frequency; and determine a range estimate to the other transceiver circuit based on a phase of the first initiation signal and on a phase of the first reflection signal.