Joint symbol, amplitude, and rate estimator

Details Joint symbol, amplitude, and rate estimator Joint symbol, amplitude, and rate estimator

2011-04-05

2011-04-05

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Receivers

Amplitude modulation

C375S316000

Reexamination Certificate

active

07920651

ABSTRACT:
The system in one embodiment relates to tightly integrating parameter estimation, symbol hypothesis testing, decoding, and rate identification. The present invention provides Turbo-decoding for joint signal demodulation based on an iterative decoding solution that exploits error correction codes. The system iteratively couples an initial amplitude estimator, a symbol estimator, a bank of decoders, and a joint amplitude estimator to produce the symbol estimates.

REFERENCES:
patent: 6023783 (2000-02-01), Divsalar et al.
patent: 6298461 (2001-10-01), Tong et al.
patent: 6373858 (2002-04-01), Soleimani et al.
patent: 6397367 (2002-05-01), Park et al.
patent: 6473417 (2002-10-01), Herzog
patent: 6510536 (2003-01-01), Crozier et al.
patent: 6574291 (2003-06-01), Doetsch et al.
patent: 6956893 (2005-10-01), Frank et al.
patent: 7110439 (2006-09-01), MacLeod
patent: 7136428 (2006-11-01), Corbaton et al.
patent: 7218665 (2007-05-01), McElwain
patent: 7218690 (2007-05-01), Learned
patent: 2002/0110206 (2002-08-01), Becker et al.
patent: 2002/0122464 (2002-09-01), Dodge
patent: 2003/0031237 (2003-02-01), Bachl et al.
patent: 2003/0074191 (2003-04-01), Byrnes et al.
patent: 2003/0086512 (2003-05-01), Rick et al.
patent: 2003/0102905 (2003-06-01), Ha et al.
patent: 2003/0125937 (2003-07-01), Thomson
patent: 2003/0128836 (2003-07-01), Stephens et al.
patent: 2003/0138054 (2003-07-01), Ha et al.
patent: 2003/0179698 (2003-09-01), Lu
patent: 2003/0189979 (2003-10-01), Li et al.
PCT Search Report dated Apr. 5, 2006 of Patent Application No. PCT/US03/38190 filed Nov. 25, 2003.
PCT Search Report dated Sep. 8, 2003 of Patent Application No. PCT/US03/15503 filed May 14, 2003.
Wei et al., “Synchronous DS-SSMA System with Improved Decorrelating Decision-Feedback Multiuser Detection”, IEEE Transactions on Vehicular Technology, Aug. 1994, pp. 767-772, vol. 43, No. 3.
Duel-Hallen, Alexandria, “Decorrelating Decision-Feedback Multiuser Detector for Synchronous Code-Division Multiple-Access Channel”, IEEE Transactions on Communications, Feb. 1993, pp. 285-290, vol. 41, No. 2.
Varanasi et al., “Near-Optimum Detection in Synchronous Code-Division Multiple-Access Systems”, IEEE Transactions on Communications, May 1991, pp. 725-736, vol. 39, No. 5.
Lupas, R. et al., “Near-Far Resistance of Multiuser Detectors in Asynchronous Channels”, IEEE Transactions on Communications, Apr. 1990, pp. 496-508, vol. 38, No. 4.
Lupas, R. et al., “Linear Multiuser Detectors for Synchronous Code-Division Multiple-Access Channels”, IEEE Transactions on Information Theory, Jan. 1989, pp. 123-136, vol. 35, No. 1.
Verdu, Sergio, “Minimum Probability of Error for Asynchronous Gaussian Multiple-Access Channels”, IEEE Transactions on Information Theory, Jan. 1986, pp. 95-96, vol. IT-32, No. 1.
Chan, A. et al., “A Class of Asymptotically Optimum Iterated-Decision Multiuser Detectors”, May 2001, pp. 1-4.
Alexander, P. et al., “Iterative Multiuser Interference Reduction: Turbo CDMA”, IEEE Transactions on Communications, Jul. 1999, pp. 1008-1014, vol. 47, No. 7.
Poor, H. Vincent, “Turbo Multiuser Detection: an Overview”, IEEE 6th Int. Symp. on Spread-Spectrum Tech. & Appl., Sep. 2000, pp. 583-587.
Wang, X. et al., “Iterative (Turbo) Soft Interference Cancellation and Decoding for Coded CDMA”, IEEE Transactions on Communications, Jul. 1999, pp. 1046-1061, vol. 47, No. 7.
Das, S. et al., “Computationally Efficient Iterative Multiuser Detection and Decoding”, IEEE, 1998, pp. 631-635.
Herzog, R. et al, “Iterative Decoding and Despreading Improves CDMA-Systems Using M-ary Orthogonal Modulation and FEC”, IEEE, 1997, pp. 909-913.
Wang, D. et al., “Low-Complexity MAP Decoding for Turbo Codes”, IEEE, 2000, pp. 1035-1039.
Berrou, C. et al., “Near Shannon Limit Error—Correcting Coding and Decoding: Turbo-Codes (1)”, IEEE, 1993, pp. 1064-1070.
Berrou, C. et al., “Near Optimum Error Correcting Coding and Decoding: Turbo-Codes”, IEEE Transactions on Communications, Oct. 1996, pp. 1261-1271, vol. 44, No. 10.
Robertson, P. et al., “A Comparison of Optimal and Sub-Optimal MAP Decoding Algorithms Operating in the Log Domain”, IEEE, 1995, pp. 1009-1013.
Hagenauer, J. et al., “A Viterbi Algorithm with Soft-Decision Outputs and its Applications”, IEEE, 1989, pp. 1680-1686.
Pottie, G. et al., “A Comparison of Reduced Complexity Decoding Algorithms for Trellis Codes”, IEEE Journal on Selected Areas in Communications, Dec. 1989, pp. 1369-1380, vol. 7, No. 9.

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