Iterative Demodulation and Decoding of Coded Non-Square QAM

Abstract

It is shown that a non-square ( N S ) 2'"+'-ary quadrature amplitude modulation (QAM) can be decomposed into a single-parity-check (SPC) block encoder and a memoryless modulator in such a way that the inherent block encoder has a recursive nature. When concatenated with a forward-error-correcting (FEC) code, iterative demodulation and decoding of the FEC… (More)

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