Iterative or Turbo decoding of parallel concatenated binary error control codes in Binary Phase Shift Keyed (BPSK) Communication System corrupted by both Additive White Gaussian Noise (AWGN) and oscillator phase noise is discussed. As an example of application of the discussed theory, iterative decoding technique of Parallel Concatenated block Codes (PCBC) is applied to a coherent Optical Code Division Multiple Access (OCDMA) network in the presence of Multiple Access Interference (MAI), detector shot noise and laser phase noise. Remarkable improvement in performance resulting from the use of turbo decoding in the OCDMA network is also discussed.

Kumar, M.S.Bhat, K.N.H.Umesh, G.2026-02-05PerformancIETE Journal of Research, 2004, 50, 3, pp. 237-2423772063https://doi.org/10.1080/03772063.2004.11665511https://idr.nitk.ac.in/handle/123456789/279582004Code division multiple accessCommunication systemsComputer simulationDecodingError analysisGaussian noise (electronic)Iterative methodsOptical communicationProbability density functionProblem solvingTurbo codesIterative (turbo) decodingLog likelihood ratioMultiple access interference (MAI)Phase noisePhase shift keyingIterative or Turbo decoding of parallel concatenated binary error control codes in Binary Phase Shift Keyed (BPSK) Communication System corrupted by both Additive White Gaussian Noise (AWGN) and oscillator phase noise is discussed. As an example of application of the discussed theory, iterative decoding technique of Parallel Concatenated block Codes (PCBC) is applied to a coherent Optical Code Division Multiple Access (OCDMA) network in the presence of Multiple Access Interference (MAI), detector shot noise and laser phase noise. Remarkable improvement in performance resulting from the use of turbo decoding in the OCDMA network is also discussed.