Multi-dimensional fractional number of bits modulation scheme

Abstract

A method of encoding information bits of a communication signal for a communication system ( 10 ) is provided. The method includes decomposing the communication signal having a corresponding M 1 -ary modulation constellation into a M 2 -ary constellation, and a M 3 -ary constellation to generate one or more symbols S i . The one or more symbols S i are mapped using a bit-to-symbol table to generate an encoded communication signal. Decoding methods are also provided for uncoded modulation and trellis coded modulation (TCM). A transmitter ( 20 ) comprising an encoder ( 12 ) for performing TCM that is capable of transmitting a fractional number of information bits per transmitted symbol is also provided.

1 - 19 . (canceled)  
   
   
       20 . A method of decoding information bits for a communication system that uses trellis-coded modulation comprising: 
 receiving a modified I-Q signals;    denoting said modified I-Q signals into a plurality of symbols S i ; and    decoding said plurality of symbols S i  simultaneously