发明授权
摘要：
A phase error detector in a digital demodulator estimates phase error by dividing the difference between an in-phase demodulated signal and the transmitted data values included in the in-phase demodulated signal by the sum or difference of a quadrature demodulated signal and a product signal. The product signal is equal to the in-phase demodulated signal multiplied by a fixed gain constant. The phase error detector thereby obtains an error estimate that is substantially independent of the transmitted data values.