Soft slicer in a hybrid decision feedback equalizer

Details Soft slicer in a hybrid decision feedback equalizer Soft slicer in a hybrid decision feedback equalizer

2006-04-25

2006-04-25

Chin, Stephen (Department: 2634)

Pulse or digital communications

Equalizers

Automatic

C375S222000, C375S229000, C375S232000

Reexamination Certificate

active

07035329

ABSTRACT:
A method and apparatus for estimating a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value. The regions in one embodiment are rectangular. The symbol estimate values may be stored in a memory storage unit.

REFERENCES:
patent: 6449246 (2002-09-01), Barton et al.
patent: 2003/0086504 (2003-05-01), Magee et al.
Jayaraman et al., “Hybrid Decision Feedback Equalization,” 2003 International Conference On Communications, vol. 4, Anchorage, AK, May 11, 2003, pp. 2380-2384.
Bednarz et al., “Decision Feedback Equalization for Channels with Error Correcting Capabilities,” IEEE International Conference on Montreal, Quebec, Canada, Jun. 8, 1997, pp. 1607-1612.
Kennedy et al., “Quantizer Design and Optimization in Decision Feedback Equalization,” Fourth International Symposium on Signal Processing and Its Applications, vol 2, Aug. 25, 1996, pp. 614-617.
Marco Chiani, “Introducing Erasures in Decision-Feedback Equalization to Reduce Error Propagation,” IEEE Transactions On Communications, vol. 45, No. 7, New York, U.S.A., Jul. 1, 1997, pp. 757-760.
Ariyavisitakul et al., “Joint Coding and Decision Feedback Equalization for Broadband Wireless Channels,” Vehicular Technology Conference, 48thIEEE, Ottawa, Canada, May 18, 1998, pp. 2256-2261.

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