Patent ID: 9564993
Date: 2017-02-07
CPC Classifications: H04L

Claim:
1. A method to perform a soft demapping, the method comprising: pre-processing a symbol, based on a priori information, wherein the preprocessing comprises: pre-processing an I channel symbol of the symbol, based on statistics of a Q channel symbol of a previously estimated symbol, and pre-processing a Q channel symbol of the symbol, based on statistics of an I channel symbol of the previously estimated symbol; wherein the statistics of the Q channel symbol comprise a mean value and a variance value; and wherein the statistics of the I channel symbol comprise a mean value and a variance value; and wherein the a priori information corresponds to one of information about an LLR and information about an extrinsic LLR with respect to the previously estimated symbol; and performing a one-dimensional (1D) soft demapping on the pre-processed symbol.