H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/00 (2006.01) H04L 1/06 (2006.01)
Patent
CA 2429687
Space-time diversity using a plurality of transmit antennas (16, 18) is provided with a turbo coding arrangement comprising two recursive systematic convolutional coders (30, 32), to one of which input bits are supplied directly and to the other of which the information bits are supplied after interleaving (34) of bit groups for respective symbol intervals. Symbols produced by the coders and comprising systematic and parity information are supplied to paths to the antennas alternately in successive symbol intervals to provide the space-time diversity. Arrangements are described for 2 and 4 antennas and for various convolutional codes, and an iterative decoder is also described.
L'invention concerne la diversité spatio-temporelle mettant en oeuvre plusieurs antennes émettrices (16, 18) et comprenant un agencement de turbocodage comportant deux codeurs convolutifs, systématiques, récursifs (30, 32), des bits d'entrée étant directement fournis à l'un de ces codeurs, et des bits d'informations étant fournis à l'autre codeur, après entrelacement (34) de groupes de bits d'intervalles de symboles respectifs. Des symboles produits par les codeurs et comprenant des informations systématiques et de parité sont acheminés vers les antennes de manière alternée, dans des intervalles de symboles successifs, afin de créer la diversité spatio-temporelle. L'invention concerne également des agencements conçus pour deux ou quatre antennes, et pour plusieurs codes convolutifs, de même qu'un décodeur itératif.
Bakouline Mikhail G.
Chloma Alexandre M.
Jia Ming
Kreindeline Vitali B.
Shinakov Yuri S.
Nortel Networks Limited
Smart & Biggar
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