A data receiver apparatus for recovering digital data signals from an M-ARY FSK modulated signal incorporates a dedicated linear discriminator, downstream of the data recovery process, in the carrier tracking loop. Because the signal modulation components are removed prior to tracking, only frequency...http://www.google.es/patents/US4518922?utm_source=gb-gplus-sharePatente US4518922 - Decision-directed, automatic frequency control technique for non-coherently demodulated M-ARY frequency shift keying
Decision-directed, automatic frequency control technique for non-coherently ...
