Patent ID: 7515665

Claim:
A detector for detecting a received signal according to a Gaussian shift keying modulation scheme wherein successive symbols are modulated by changes in phase of a carrier signal, the detector comprising: a differential phase detector, the differential phase detector producing a differential phase signal representing a change in phase between a previous symbol and a next symbol; an equalizer, the equalizer producing a filtered phase signal signal by filtering inter-symbol interference from the differential phase signal; and a decision feedback data slicer, the decision feedback data slicer producing an output decision signal representing successive detected symbols in response to the filtered phase signal, the decision feedback data slicer comprising: a first combiner, the first combiner producing a feedback signal by combining the filtered phase signal representing a change in phase between the previous symbol and the next symbol with a gain constant, the gain constant defined by a value having a sign corresponding to a sign of the previous symbol as represented by the output decision signal; and a second combiner, the second combiner producing a preliminary detected signal by combining the filtered phase signal representing a change in phase between the previous symbol and the next symbol with the feedback signal, wherein the decision feedback data slicer produces an output decision signal representing the next symbol in response to the preliminary detected signal.