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We study the joint effects of transmitter in-phase/quadrature-phase (IQ) mismatch, channel distortion, and laser phase noise in a coherent optical orthogonal frequency-division-multiplexed system. We propose a decision-aided joint compensation scheme, which separates the transmitter IQ mismatch as well as channel distortion and phase noise compensation into two consecutive steps. Simulation results...
The dynamic input power range resulting in BER<;10-3 using our proposed joint-SPM compensation scheme can be increased by 0.4 dB and 1.2 dB, compared to separately compensate for SPM at either transmitter or receiver side.
This paper presents a geometric-view-based evaluation for the generalized Marcum Q-function Q_m(a,b), which is interpreted as the probability that a random Gaussian point whose mean vector has an Euclidean norm a≥, lies outside of an N-dimensional sphere/hypersphere of radius b≥0, centered on the origin point O, where N=2m≥3. By using the geometric symmetry of the sphere/hypersphere...
Iterative decoding of low-density parity-check codes transmitted over noncoherent channels using binary differential phase-shift keying modulation is examined. Using the joint estimation approach and the averaged likelihood function approach, the log-likelihood ratios of the two values of each bit, based on two contiguous received signal samples that convey the bit, are derived. In addition, a simplified...
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