Patent ID: 9319250
Filing Date: 2016-04-19
CPC Classification: H03M,H04B,H04J,H04L

Claim Text:
1. A turbo decoding method for decoding a stream of a plurality orthogonal frequency division multiplexing (OFDM) symbols in which a plurality of constellations are generated by block coding and trellis coding a first number of least significant bits and only block coding a second number of most significant bits, comprising: receiving the plurality of orthogonal frequency division multiplexing (OFDM) symbols; demodulating the plurality of OFDM symbols to obtain a plurality of signal constellations having variable sizes; inputting, to a soft input soft output (SISO) constellation demapper, the plurality of signal constellations, along with information about a number of bits represented by each constellation from the plurality of signal constellations; and operating a soft input soft output (SISO) constellation demapper on constellations of variable sizes to generate an output for subsequent soft decoding.