Iterative demapping

Details Iterative demapping Iterative demapping

H - Electricity

03

M

H03M 13/25 (2006.01) H03M 13/27 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2266108

The invention comprises a method and apparatus for iteratively decoding a multilevel modulated signal in which the soft output information of a channel decoder is fed back and utilized by a tailored soft demapping device in order to improve the decoding result by further iterative decoding steps. The receiver includes a demapper for generating a demapped signal, bit deinterleaver for generating a demapped and deinterleaved signal and a decoder for generating soft reliability values representative of the decoded signal. These soft reliability values are then bit interleaved and fed back to the demapper, as a priori knowledge, for use in fiuther iterations of the decoding process.

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