Signals through transmitting and receiving homologous equipment contain analog down conversion, A/D sampling, digital signal transfer and management, D/A recovering and analog up conversion. A signal transmission model of transmitter and receiver homologous equipment is presented, and an analysis of the influence of phase noise on the signal is made. Through an analysis of the frequency standard phase noise changes at down-convert moment and the up-convert moments, an expression for the influence of frequency standard phase noise upon the signals through transmitting and receiving homologous equipment was derived, and a conclusion was drawn that: because of frequency standard phase noise, signals through transmitting and receiving homologous equipment, RF carrier frequency and code rate were multiplied as a constant factor. It could be viewed as the equivalent to a Doppler offset shift, and its trend keeps consistent with frequency standard drift trend. The result is fundamentally different from the general conclusion. It considers that the transmitter and receiver derived by the same frequency standard can fully offset the impact. Finally, by designing the special experimental program, efforts were made to verify the derivation of Doppler drift factor expression. Experimental test results show that the Doppler shift test results are consistent with the formula derived result, and the frequency drift trend is in line with expectations. Therefore, the experimental test results met well with the deduced conclusion from the theoretical analysis.