Patent Document ID: 20150222457
Application ID: 14341869
Patent Flag: 0

Claim One:
1. A method of soft output multiple-input-multiple-output (MIMO) decoding, the method comprising: generating a tree-graph of bits based on: MIMO rank of a receiver, number of bits per layer in the graph, and type of modulation, wherein the tree-graph comprises a root node, leaf nodes, nodes, and branches connecting the nodes; performing sphere decoding by determining a radius covering a subset of nodes within said tree-graph; managing, based on the sphere decoding, tables comprising metrics and counter metrics usable for log likelihood ratio (LLR) generation; predicting, based on a specified prediction scheme, counter metrics for paths in the tree-graph that comprise nodes and branches out of the determined radius; and updating the tables comprising the metrics and the counter metrics with the predicted counter metric, in a case that the predicted counter metrics are better in maximum likelihood terms than the determined counter metrics.