Wadsworth, Philip R.Baker, Kent D.Beladi, S. Hossain
인용정보
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2인용 특허 :
13
초록▼
A decoding method and apparatus include providing capability for decoding data symbols that were encoded in a transmitter by either a serial-concatenated code or turbo code in a parallel processing fashion. The receiver upon knowing the encoding method may reconfigure the selection of data symbols f
A decoding method and apparatus include providing capability for decoding data symbols that were encoded in a transmitter by either a serial-concatenated code or turbo code in a parallel processing fashion. The receiver upon knowing the encoding method may reconfigure the selection of data symbols from a table (600) to accommodate the appropriate decoding process. Initially a data symbol estimate for a number of data symbols of a plurality of data symbols Xi, Yi, and Wi are determined. The estimates of data symbols Xi, Yi, and Wi passing to a first and second decision nodes (610, 620) include estimates for the variables in one or more encoding equations. A new estimate for the data symbol Xi is determined based on the estimate determined at the initial step and the new estimate for each occurrence of the data symbol Xi at the first and second decision nodes (610, 620). After normalizing estimates of data symbols Xi, Yi, and Wi, a new estimate for data symbol Xi may be determined which holds more confidently a true value for the data symbol Xi than a previously determined estimate.
대표청구항▼
A decoding method and apparatus include providing capability for decoding data symbols that were encoded in a transmitter by either a serial-concatenated code or turbo code in a parallel processing fashion. The receiver upon knowing the encoding method may reconfigure the selection of data symbols f
A decoding method and apparatus include providing capability for decoding data symbols that were encoded in a transmitter by either a serial-concatenated code or turbo code in a parallel processing fashion. The receiver upon knowing the encoding method may reconfigure the selection of data symbols from a table (600) to accommodate the appropriate decoding process. Initially a data symbol estimate for a number of data symbols of a plurality of data symbols Xi, Yi, and Wi are determined. The estimates of data symbols Xi, Yi, and Wi passing to a first and second decision nodes (610, 620) include estimates for the variables in one or more encoding equations. A new estimate for the data symbol Xi is determined based on the estimate determined at the initial step and the new estimate for each occurrence of the data symbol Xi at the first and second decision nodes (610, 620). After normalizing estimates of data symbols Xi, Yi, and Wi, a new estimate for data symbol Xi may be determined which holds more confidently a true value for the data symbol Xi than a previously determined estimate. ssion Diversity in Wideband CDMA; 1999 IEEE; 0-7803-5565-2/99; p. 1545-1549. Correia, A. et al.; Optimised Constellations for Transmitter Diversity; 1999 IEEE; 0/7803-5435-4/99; p. 1785-1789. Tarokh, V. et al.; A Differential Detection Scheme for Transmit Diversity; 1999 IEEE; 0-7803-5668-3/99; p. 1043-p. 1047. D. Mihai Ionescu; New Results on Space-Time Code Design Criteria; 1999 IEEE; pp. 684-687; 0-7803-5668-3/99. Tarokh, V., et al.; Space-Time Codes for High Data Rate Wireless Communication: Performance Criterion and Code Construction; 1998 IEEE; IEEE Transactions on Information Theory, vol. 44, No. 2, Mar. 1998. Edited by Holma H., et al.; WCDMA for UMTS Radio Access for Third Generation Mobile Communications; Reprinted Jun. 2000; p. 97; John Wiley & Sons, Ltd., Baffins Lane, Chichester, West Sussex, PO19 1UD, England. Tarokh, V., et al.; Space-Time Block Coding for Wireless Communications: Performance Results; 1999 IEEE; IEEE Journal on Selected Areas in Communications, vol. 17. No. 3, Mar. 1999. Naguib, A.F. et al; Space-Time Coded Modulation for High Data Rate Wireless Communications; 1997 IEEE; pp. 102-109; 0-7803-4198-8/97. Shiu, D. et al.; "Scalable Layered Space-Time Codes for Wireless Communications: Performance Analysis and Design Criteria"; 0-7803-5668-3/99; 159-163 pp.; 1999 IEEE; University of California at Berkeley USA. Alamouti, S.M. et al; Trellis-Coded Modulation and Transmit Diversity: Design Criteria and Performance Evaluation; 1998 IEEE; pp. 703-707; 0-7803-5106-1/98. Shiu, D. et al.; "Layered Space-Time Codes for Wireless Communications Using Multiple Transmit Antennas"; 0-7803-5284-X99; 436-440 pp.; 1999 IEEE; University of California at Berkeley USA. Hassibi, B. et al.; "High-Rate Linear Space-Time Codes"; IEEE Apr. 2001; p. 2461-p. 2464, 0-7803-7041-04/01. Lo, T. et al; Space-Time Block Coding--From a Physical Perspective; 1999 IEEE; pp. 150-153; 0-7803-5668-3/99.
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