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- Patents > 2008-02-14 > SECTION H ELECTRICITY > ELECTRIC COMMUNICATION TECHNIQUE > TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
WIRELESS COMMUNICATION METHOD AND SYSTEM FOR INDEXING CODEBOOK AND CODEWORD FEEDBACK
The present invention is related to indexing channel information feedback in a multiple-input multiple-output (MIMO)-based wireless communication system. In one embodiment, at least one measurement of a channel metric is performed. The measured channel metric is quantized and a codeword is selected that represents the measured channel metric. Feedback is generated based on the channel metric measurement. The feedback includes an index to the selected codeword. A codebook is generated by partitioning a plurality of codewords into two or more tiers, assigning indices to the codewords and correlating the codewords in complex vector space and Hamming distance in binary indices. For any given codeword, a first subset of the codewords may have a higher correlation with respect to the given codeword. In another embodiment, the number of bits used to report codebook indexing is determined based on the frequency of the generation of the feedback.
Filed on: 2007-08-06; Application Number: 11834155