Frequency and Phase Investigation of the Local Oscillator Offset in a W-Band Satellite Communication Link

This paper discusses an investigation of the local-oscillator (LO) offset in frequency and phase for a W-band communication link, affected by the Doppler effect. To evaluate the carrier frequency offset (CFO), the bit error rate (BER) and the error vector magnitude (EVM) are used as performance metrics. The impact of the CFO on the BER and EVM is analyzed by measuring the BER and EVM of the received signal. The results show that the LO frequency offset has a significant impact on the BER, while the LO phase offset has a negligible effect on system performance. However, both the LO frequency and phase offsets have a significant impact on the EVM. The results of this study can provide a better understanding of the impact of the LO offset on the performance of the W-band satellite communication systems and help improve the tracking and data synchronization methods. The purpose of the paper is to analyze and quantify the effect of the LO offset in homodyne and heterodyne systems and to find the maximum allowed LO offset for correct synchronization, without additional hardware.