Doppler Frequency Shift Compensation in Millimeter-Wave Multi-Port Receiver Front-Ends

In this paper, a carrier recovery system is proposed to precisely estimate and compensate for the Doppler shift in millimeter-wave multi-port receivers. It includes the frequency and phase correction units in two parallel paths. These paths are loops close after demodulation and have an impact on each other's output. The proposed system accurately finds and compensates for the Doppler shift in the received signals up to 11 kHz.