| 摘要 |
FIELD: information technology. ^ SUBSTANCE: several open-loop solutions which encompass small delay CDD codeword cycling, codeword cycling between different re-transmissions of both small and large delay CDD are proposed. In addition, an open-loop codeword cycling method for SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ, are proposed. In one method, a plurality of information bits is encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols is mapped onto subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for each certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennae. ^ EFFECT: high channel reliability by propagating and/or coding information relative subcarriers. ^ 22 cl, 15 dwg |
