Title :
Performance of non-uniform 16QAM modulation over linear and nonlinear channels
Author :
Ngo, N.H. ; Pietrobon, S.S. ; Barbulescu, S.A.
Author_Institution :
Univ. of South Australia, SA, Australia
fDate :
4/27/2006 12:00:00 AM
Abstract :
A technique of using a non-uniform 16QAM modulation combined with bit interleaved coded modulation and a new iterative decoding (BICM-ID) scheme is investigated. Simulation results of a parallel concatenated convolutional code shows a gain of 0.95 dB at a BER of 10-5 compared to conventional uniform 16QAM modulation in a linear channel. For a nonlinear satellite channel, this scheme offers a gain of 1.2 dB at the same BER compared to a uniform constellation.
Keywords :
channel coding; concatenated codes; convolutional codes; interleaved codes; iterative decoding; modulation coding; quadrature amplitude modulation; turbo codes; 0.95 dB; 1.2 dB; 16 QAM modulation; BER; BICM-ID scheme; bit interleaved coded modulation; coding gain; iterative decoding scheme; linear channels; nonlinear channels; nonlinear satellite channel; nonuniform modulation; parallel concatenated convolutional code; uniform constellation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20060836
