A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

A transceiver group includes a plurality of transceivers; wherein the transceiver group performs transmission and receiving through a wire, and each of the transceivers includes a transmitter and a receiver, and the transmitter includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for a plurality of data streams to be transmitted; a modulator, coupled to the data streams to be transmitted and the carrier generator, to generate a plurality of modulated data streams carried on the plurality of carriers; and a summer arranged to merge the plurality of modulated data streams to an output signal to the wire; and the receiver includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for an input signal received from the wire; and a demodulator, coupled to the input signal and the carrier generator, to generate a plurality of demodulated data streams.

To provide a radio apparatus including an amplifier, a first mixer, an analog-to-digital converter, a distortion compensator, and an oscillator. The amplifier amplifies power of a transmission signal. The mixer unit mixes a feedback signal from the amplifier with a local signal of a predetermined frequency. The analog-to-digital converter performs analog-to-digital conversion on an output signal of the mixer unit. The distortion compensator compensates nonlinear distortion of the amplifier based on a digital signal obtained by performing the analog-to-digital conversion. The oscillator changes a frequency of the local signal to be mixed with the feedback signal in the first mixer in a time division manner, with frequency spacing corresponding to a sampling rate of the analog-to-digital converter.

To provide a radio apparatus including an amplifier, a first mixer, an analog-to-digital converter, a distortion compensator, and an oscillator. The amplifier amplifies power of a transmission signal. The mixer unit mixes a feedback signal from the amplifier with a local signal of a predetermined frequency. The analog-to-digital converter performs analog-to-digital conversion on an output signal of the mixer unit. The distortion compensator compensates nonlinear distortion of the amplifier based on a digital signal obtained by performing the analog-to-digital conversion. The oscillator changes a frequency of the local signal to be mixed with the feedback signal in the first mixer in a time division manner, with frequency spacing corresponding to a sampling rate of the analog-to-digital converter.

A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

A transmitter with compensating mechanism of pulling effect includes an output unit and a correction unit. The output unit mixes a first correction signal and a second correction signal according to an oscillating signal to generate a modulated signal, and to amplify the modulated signal to generate a first output signal. The correction unit analyzes the power of the first output signal to generate a first coefficient and a second coefficient, and generate the first correction signal and the second correction signal according to the first coefficient, the second coefficient, an in-phase data signal, and a quadrature data signal.

A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

A transceiver group includes a plurality of transceivers; wherein the transceiver group performs transmission and receiving through a wire, and each of the transceivers includes a transmitter and a receiver, and the transmitter includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for a plurality of data streams to be transmitted; a modulator, coupled to the data streams to be transmitted and the carrier generator, to generate a plurality of modulated data streams carried on the plurality of carriers; and a summer arranged to merge the plurality of modulated data streams to an output signal to the wire; and the receiver includes: a carrier generator arranged to generate a plurality of carriers having different frequencies for an input signal received from the wire; and a demodulator, coupled to the input signal and the carrier generator, to generate a plurality of demodulated data streams.

Certain aspects of the present disclosure provide techniques for generating and processing a frequency multiplexed continuous wave (FMCW) based synchronization signal (SS). According to certain aspects, a method for wireless communication at a wireless node, comprising obtaining a synchronization signal comprising a first frequency modulated continuous waveform signal associated with a frequency that increases in time for a duration according to a first slope and a second FMCW signal that overlaps with the first FMCW signal, wherein the second FMCW signal is associated with a frequency that decreases in time for the duration according to a second slope that corresponds to a negative of the first slope; and performing frequency offset estimation based on the first and second FMCW signals.