Patent ID: 7986752
Filing Date: 2011-07-26
Classification: H04L

Abstract:
1. A method of detecting and decoding a multiple-input multiple-output (MIMO) signal vector, comprising: determining, in parallel, soft decision outputs for each symbol in the signal vector in view of a priori soft decoded symbol probabilities by: generating a tree of lattice points by generating all nodes in a level in parallel by: applying sphere decoding techniques to determine a radius of a hyper-sphere in accordance with a channel condition; searching for all lattice points contained within the hyper-sphere to determine the generated nodes; and determining a branching factor for each generated node; and retaining a predetermined number of nodes as nodes for a next level of the tree; receiving soft decoded symbol probabilities determined in accordance with the soft decision outputs; and iteratively repeating the steps of determining soft decision outputs and receiving soft decoded decision outputs to decode the signal vector.