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.
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