Probabilistically Shaped Multi-Level Coding with Polar Codes for Fading Channels
A probabilistic shaping method for multi-level coding (MLC) is presented, where the transmitted symbols are forced to have a shaped non-uniform distribution. It is shown that shaping only a single bit-level suffices to compensate for most of the shaping loss on the fading channels. A polar code base...
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Zusammenfassung: | A probabilistic shaping method for multi-level coding (MLC) is presented,
where the transmitted symbols are forced to have a shaped non-uniform
distribution. It is shown that shaping only a single bit-level suffices to
compensate for most of the shaping loss on the fading channels. A polar code
based implementation of the proposed scheme is presented, where shaping is
performed by using a precoder at the transmitter without increasing the
decoding complexity. Simulation results show that performance improvements can
be obtained compared to BICM- and MLC-based polar coding without shaping on
Rayleigh fading channels. |
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DOI: | 10.48550/arxiv.1812.07864 |