Patent ID: 8555145
Filing Date: 2013-10-08
Classification: H03M,H04L

Abstract:
1. A method comprising: in respect of a plurality of codewords of a full codebook and a plurality of codeword subsets, each codeword subset containing a respective plurality of the codewords of the full codebook, repeatedly: determining a best codeword from the full codebook; adaptively selecting a codeword subset of the plurality of codeword subsets to be a current codeword subset by selecting, based on a threshold criterion, between a) the most recently selected current codeword subset and b) another codeword subset that contains the best codeword from the full codebook; if adaptively selecting results in a change in the current codeword subset, transmitting an indication of the current codeword subset; transmitting an index of a codeword within the current codeword subset of the plurality of codeword subsets.