TRANSMISSION METHOD WITH DELAY DIVERSITY AND SPACE-FREQUENCY DIVERSITY

摘要

PROBLEM TO BE SOLVED: To provide an open-loop solution including a small delay CDD codeword circulation method and a codeword circulation method between different re-transmissions of both small and large delay CDD, and to provide an open-loop codeword circulation method for SFBC+FSTD method, as well as an extension to SFBC+FSTD based HARQ.

SOLUTION: In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for circulation delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are circulated for every certain number of subcarriers. The precoded symbols are transmitted via a plurality of transmission antennas.

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