Pilot-aided log-likelihood ratio for LDPC coded MPSK-OFDM transmission
Cao, S. Kam, P.-Y. Yu, C.
Cao, S.
Yu, C.
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Abstract
The pilot-aided log-likelihood ratio (LLR) is derived from low-density parity-check coded coherent optical M-ary phase-shift keying orthogonal frequency division multiplexing transmission system with laser phase noise. Approximations of the metrics, which yield lower computational cost and comparable performance, are also introduced. The bit error ratio performance is tested through simulation for the proposed LLR metrics. © 1989-2012 IEEE.
Keywords
Log-likelihood ratio (LLR), low-density parity-check (LDPC), orthogonal frequency division multiplexing (OFDM), phase noise
Source Title
IEEE Photonics Technology Letters
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Date
2013
DOI
10.1109/LPT.2013.2246563
Type
Article