Bandwidth Efficient and Rate-Matched Low-Density Parity-Check Coded Modulation

By Georg Böcherer, Fabian Steiner, Patrick Schulte. IEEE Transactions on Communications, 2015

698 citations recorded by the source corpus.

A new coded modulation scheme is proposed. At the transmitter, the concatenation of a distribution matcher and a systematic binary encoder performs probabilistic signal shaping and channel coding. At the receiver, the output of a bitwise demapper is fed to a binary decoder. No iterative demapping is performed. Rate adaption is achieved by adjusting the input distribution and the transmission power. The scheme is applied to bipolar amplitudeshift keying (ASK) constellations with equidistant signal points and it is directly applicable to two-dimensional quadrature amplitude modulation (QAM). The scheme is implemented by using the DVB-S2 low-density parity-check (LDPC) codes. At a frame error rate of 10-3, the new scheme operates within less than 1.1 dB of the AWGN capacity 1/2 log2(1 + SNR) at any spectral efficiency between 1 and 5 bits/s/Hz by using only 5 modes, i.e., 4-ASK with code rate 2/3, 8-ASK with 3/4, 16-ASK and 32-ASK with 5/6, and 64-ASK with 9/10.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/a95ec44ae24c6a982ceb8251fe7bb2645279ca69

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Citations in the corpus

Constant Composition Distribution Matching (2015, background): “VI] for rate adaptation and in [6] to achieve the capacity of the additive white Gaussian noise channel.”
Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration (2016, methodology): “We use the rate adaptive coding and modulation scheme proposed in [11], [13], which transmits different modulation symbols with different probabilities.”
On Probabilistic Shaping of Quadrature Amplitude Modulation for the Nonlinear Fiber Channel (2016, methodology): “Using the scheme in [21], the labeling of the quadrature amplitude modulation (QAM) symbols can remain an off-the-shelf binary reflected Gray code, which gives large achievable information rates (AIRs) for bit-wise decoders and makes exhaustive numerical searches for an optimal labeling obsolete.”
White Paper on Broadband Connectivity in 6G (2020, background): “Their application to wireless communication is worth careful study [100, 101].”