Electronics Letters · 2007 · 14 citations · 6 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationOptoelectronicsPhotonicsChannel CodingOptical Communication SystemsOptical ModulationOptical Signal ProcessingReceiver SystemsSemiconductor LasersBit Error RateBit-error Rate AnalysisBlock EstimationDistributed Feedback LasersOptical ReceiversPhase NoiseViterbi AlgorithmViterbi Decoding
For intradyne QPSK receivers, block phase estimation based on the Viterbi and Viterbi algorithm has been reported to yield better OSNR results than differential detection. When a laser with large phase noise such as a distributed feedback laser is used, typically a higher error floor is observed with block phase estimation. With shorter block length, the bit-error rate (BER) floor for a 5.0 Gbit/s real-time intradyne receiver was improved without large sacrifice in the low BER performance.
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