Highly parallel map decoder

Details Highly parallel map decoder Highly parallel map decoder

H - Electricity

03

M

H03M 13/29 (2006.01) H03M 13/45 (2006.01)

Patent

CA 2363410

A coded signal is decoded using maximum a posteriori (MAP) decoding. Several MAP engines (104) each decodes a corresponding diffenrent portion (102) of a frame (100) of symbol estimates. The tail portion (103) of each portion is decoded into an initialization value (105) for the adjoining map engine (104). The resulting sections (108) of soft (or hard) decisions are output to make a decision frame (106).

Selon l'invention, on décode un signal codé en faisant appel à un décodage à probabilité maximale a posteriori (MAP). Plusieurs moteurs MAP (104) décodent chacun une partie différente (102) d'une trame (100) d'estimations de symboles. La queue (103) de chaque partie est décodée et transformée en une valeur d'initialisation (105) pour le moteur MAP adjacent (104). Les parties obtenues (108) de décisions douces (ou fermes) sont sorties afin d'élaborer une trame de décision (106).

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