Pulse or digital communications – Transmitters
Reexamination Certificate
2005-05-24
2005-05-24
Fan, Chieh M. (Department: 2634)
Pulse or digital communications
Transmitters
C375S296000, C375S240240
Reexamination Certificate
active
06898251
ABSTRACT:
In order to evaluate the noise related to data issuing from a turbo-encoder, estimates of the noise related to its systematic output, to the data issuing from its first elementary encoder, and to the data issuing from its second elementary encoder are determined. At least two of the estimates of the noise related to the systematic output, to the data issuing from the first encoder, and to the data issuing from the second encoder, are added. The results of these additions are divided by the number of augends added, and then inverted, so as to obtain a noise factor, and the noise factor is multiplied with the data issuing from at least one of the first encoder, second encoder, and systematic output.
REFERENCES:
C. Berru et al.,Near Shannon Limit Error—Correcting Coding and Decoding: Turbo-Codes(1), IEEE (1993), pp. 1064-1070.
Wang C C: “On the Optimization of Channel Side Information for Turbo Decoding”, 2000 IEEE Aerospace Conference, Proceedings (Cat. No. 005H848), 2000 IEEE Aerospace Conference Proceedings, Big Sky, MT. USA, Mar. 18-25, 2000, pp. 311-315, vol. 1.
Summers T. A. et al: “SNR Mismatch and Online Estimation in Turbo Decoding”, IEEE Transactions on Communications, Apr. 1998, IEEE, USA, vol. 46, No. 4, pp. 421-423.
Huang X et al: “Turbo Decoders Which Adapt to Noise Distribution Mismatch”, IEEE Communications Letters, IEEE Service Center, Piscataway, US, US, vol. 2, No. 12, Jan. 1999, pp. 321-323.
Ehrmann Frederique
Le Bars Philippe
Le Scolan Lionel
Rousselin Samuel
Thoumy Francois
Canon Kabushiki Kaisha
Fan Chieh M.
Fitzpatrick ,Cella, Harper & Scinto
Perilla Jason M.
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