Methods and systems for soft-bit demapping

Details Methods and systems for soft-bit demapping Methods and systems for soft-bit demapping

2006-08-04

2009-12-22

Wang, Ted M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S229000, C375S231000, C375S232000, C375S233000, C375S299000, C375S347000

Reexamination Certificate

active

07636401

ABSTRACT:
Methods and systems for reconfigurable soft-output bit demapping, reconfigurable for different modes of operation (i.e., different transmitter/receiver configurations) and for different modulation schemes are provided. In an embodiment, a reconfigurable soft-output bit demapping system includes a mode/modulation independent equalizer, a plurality of mode/modulation independent soft-slicers coupled to the outputs of the equalizer, a plurality of mode/modulation independent post-scalers coupled to the outputs of the soft-slicers, and a mode-dependent coefficient calculator. The coefficient calculator generates parameters for configuring the equalizer, the soft-slicers, and the post-scalers according to the used mode of operation and modulation scheme.

REFERENCES:
patent: 7117353 (2006-10-01), Natu et al.
patent: 7257172 (2007-08-01), Okamoto et al.
patent: 7349495 (2008-03-01), Krupka
patent: 2007/0036246 (2007-02-01), Hammerschmidt
Tosato and Bisaglia, “Simplified Soft-Output Demapper for Binary Interleaved COFDM with Application to HIPERLAN/2,” ICC 2002—IEEE International Conference on Communications, vol. 25 (1), Apr. 2002, pp. 664-668.
Non-Final Office Action for U.S. Appl. No. 11/500,405, mailed Apr. 14, 2009, 9 pgs.

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