Title :
Achievable rates for four-dimensional coded modulation with a bit-wise receiver
Author :
Alvarado, Alex ; Agrell, Erik
Author_Institution :
Dept. of Eng., Univ. of Cambridge, Cambridge, UK
Abstract :
We study achievable rates for four-dimensional (4D) constellations for spectrally efficient optical systems based on a (suboptimal) bit-wise receiver. We show that PM-QPSK outperforms the best 4D constellation designed for uncoded transmission by approximately 1 dB. Numerical results using LDPC codes validate the analysis.
Keywords :
modulation coding; optical fibre networks; optical receivers; parity check codes; quadrature phase shift keying; 4D constellations; LDPC codes; PM-QPSK; four-dimensional coded modulation; four-dimensional constellations; spectrally efficient optical systems; suboptimal bit-wise receiver; uncoded transmission; Decoding; Forward error correction; Optical modulation; Optical receivers; Signal to noise ratio;
Conference_Titel :
Optical Fiber Communications Conference and Exhibition (OFC), 2014
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-5575-2994-7
DOI :
10.1364/OFC.2014.M2C.1
