A digital demodulator which removes frequency and phase errors existing in a digital signal and converting the error-removed digital signal into a base band signal. The digital demodulator uses a frequency that is twice the transmission rate as the frequency of the sampling clock signal of an analog-to-digital...http://www.google.co.uk/patents/US6133964?utm_source=gb-gplus-sharePatent US6133964 - Digital demodulator and method therefor
