Title :
Phase noise-robust LLR calculation with linear/bilinear transform for LDPC-coded coherent communications
Author :
Koike-Akino, Toshiaki ; Millar, David S. ; Kojima, Keisuke ; Parsons, Kieran
Author_Institution :
Mitsubishi Electr. Res. Labs. (MERL), Cambridge, MA, USA
Abstract :
We propose a modified log-likelihood ratio (LLR) calculation for an LDPC decoder to be robust against residual phase noise at the demodulator. The proposed scheme is based on a linear/bilinear transform offers 1 ~ 2dB gain in the presence of large phase noise.
Keywords :
optical communication; parity check codes; phase noise; LDPC-coded coherent communications; demodulator; linear/bilinear transform; modified log-likelihood ratio calculation; phase noise-robust LLR calculation; residual phase noise; Bit error rate; Decoding; Demodulation; Gain; Parity check codes; Phase noise; Transforms;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
