Patent ID: 9548877
Date: 2017-01-17
CPC Classifications: H03M,H04B,H04L

Claim:
1. An apparatus for receiving a transmission in a communication system implementing a recursive modulation scheme and an Irregular Repeat Accumulate (IRA) code, the apparatus comprising: a soft demodulator comprising a joint recursive modulator and accumulator soft decoder for receiving a transmit signal and configured to demodulate the received signal using a trellis based algorithm using a joint trellis for the accumulator and recursive modulation scheme to generate a plurality of coded symbol estimates, wherein the soft demodulator does not include a de-interleaver to demodulate the received signal with the joint recursive modulator and accumulator soft decoder; and a Low Density Generator Matrix (LDGM) decoder for receiving the plurality of coded symbol estimates from the soft demodulator and decoding the coded symbol estimates to generate a plurality of source bit estimates.