Method, for measuring differential Doppler offset between two signals, involves multiplying signals together with ninety degrees offset, and normalizing with phase estimation/frequency estimation using multi hypothesis similarity test

摘要

The Doppler offset measurement technique has two input signals (S1(t),S2(t)). The two signals are multiplied together (212) and multiplied together with a 90 degree phase offset (222). The signals are normalized (202), and real and imaginary signals produced (203). The signal is applied to a frequency estimator (203) using a multi hypothesis similarity test.