Patent ID: 7333571

Claim:
A method of encoding, comprising: performing a first outer encoding on a first portion of an input sequence of bits to produce first outer encoded bits; performing a second outer encoding on a second portion of the input sequence of bits to produce second outer encoded bits; bit interleaving said first outer encoded bits to produce first interleaved encoded bits; bit interleaving said second outer encoded bits to produce second interleaved encoded bits; performing a modified FQPSK modulation on said first interleaved encoded bits and said second interleaved encoded bits to produce I and Q waveform sequences, wherein said performing the modified FQPSK modulation realizes a modulation with memory, wherein said performing the modified FQPSK modulation includes: performing an I-channel recursive encoding on the first interleaved encoded bits to generate I encoder outputs; performing a Q-channel recursive encoding on the second interleaved encoded bits to generate Q encoder outputs; performing a signal mapping on the I encoder outputs and the Q encoder outputs to generate said I and Q waveform sequences; wherein said I and Q waveform sequences are continuous in time.