Patent ID: 7551694

Claim:
A limiter based analog demodulator comprising: a power amplifier receiving a base-band signal; a local clock operating at the base-band frequency; a first multiplier receiving an output from the power amplifier and the local clock to provide an in phase signal; a quadrature phase shifter receiving the local clock; a second multiplier receiving the output from the power amplifier and an output from the quadrature phase shifter to provide a quadrature signal; a first analog filter receiving the in phase signal; a second analog filter receiving the quadrature signal; a first analog to digital converter connected to the first analog filter and providing a digitized in phase signal; a second analog to digital converter connected to the second analog filter and providing a digitized quadrature signal; and a phase detector that detects a phase of the digitized in phase and quadrature signals, a decimation filter receiving the digitized in phase and quadrature signals and providing input data at three times a symbol rate; a burst detector that receives the input data; a carrier offset block responsive to the burst detector and providing an offset angle; a rotator responsive to the offset angle to rotate the input data; and an equalizer receiving data from the rotator for coherent demodulation.