Differential space-time block coding

Details Differential space-time block coding Differential space-time block coding

H - Electricity

04

L

H04L 1/06 (2006.01)

Patent

CA 2432215

A differential space-time block coder produces successive space-time blocks of symbols from M-PSK symbols to be encoded, in accordance with an orthogonal matrix and a normalization factor. Differentially encoded space-time output blocks, for transmission via a plurality of transmit antennas (16, 18) of a wireless communications system, are produced by multiplying (42) each space- time block from the space-time block coder (40) by the respective previous (44) differentially encoded space-time output block. Decoding is independent of channel estimation, and the arrangement is simple, avoids error propagation, and is applicable to different numbers of transmit antennas.

Cette invention concerne un codeur de blocs spatio-temporels diff~rentiel produisant des blocs spatio-temporels successifs de symboles ~ partir de symboles M-PSK ~ coder, conform~ment a une matrice orthogonale et ~ un facteur de normalisation. Pour obtenir des blocs spatio-temporels de sortie ~ codage diff~rentiel, en vue d'une transmission via une pluralit~ d'antennes d'~mission (16, 18) d'un syst­me de communication sans fil, on multiplie (42) chaque bloc spatio-temporel provenant du codeur spatio-temporel (40) par le bloc de sortie spatio-temporel ~ codage diff~rentiel (44) pr~c~dent correspondant. Le d~codage est ind~pendant de l'estimation de canal, ~vite des erreurs de propagation et peut s'appliquer ~ des nombres variables d'antennes d'~mission.

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