Patent ID: 8060811
Filing Date: 2011-11-15
Classification: H04B,H04L

Abstract:
1. A method of performing a linear-complexity optimal soft Multiple-input-multiple-output (MIMO) detector in a 2×N R system, the method comprising the steps of: calculating first and second generator matrices using channel pre-processing based upon a channel matrix; applying the generator matrices to a received vector to generate a first and a second modified received vectors wherein the first modified received vector comprises an original transmitted vector and the second modified received vector comprises a flipped version of the original transmitted vector; selecting a first element and a second element of the transmitted vector as child and parent symbols respectively; determining, for both the transmitted vector and the flipped version of the transmitted vector, for each possible value of the parent symbol, a first child by mapping a zero-forcing estimate of the child symbol to the nearest constellation point in an associated constellation scheme using the first and second modified received vectors; adding candidates to a candidate list from the determined parent symbol and it's first child symbol for each of the transmitted vector and flipped version of transmitted vector; and calculating log-likelihood ratios (LLRs) of all bits for each resulting vector.