Title :
Soft-Decoding of Low-Density Parity Check Codes for DPSK Signals
Author :
Ho, Keang-Po ; Wang, Hsi-Cheng
Author_Institution :
SiBEAM, Sunnyvale
Abstract :
The exact log-likelihood ratio for a direct-detection DPSK signal is derived analytically. A 7%-overhead low-density parity check (LDPC) code provides 9.7 dB net coding gain.
Keywords :
decoding; differential phase shift keying; parity check codes; direct-detection DPSK signal; exact log-likelihood ratio; low-density parity check codes; net coding gain; soft decoding; AWGN; Additive white noise; Differential quadrature phase shift keying; Forward error correction; Gain; Iterative decoding; Optical fiber communication; Optical polarization; Parity check codes; Signal analysis;
Conference_Titel :
Optical Fiber Communication and the National Fiber Optic Engineers Conference, 2007. OFC/NFOEC 2007. Conference on
Conference_Location :
Anaheim, CA
Print_ISBN :
1-55752-831-4
DOI :
10.1109/OFC.2007.4348867
