Physical-layer network coded QAM with trellis shaping for the two-way relay channel
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|Title:||Physical-layer network coded QAM with trellis shaping for the two-way relay channel||Authors:||Donati, Daniela; Flanagan, Mark F.||Permanent link:||http://hdl.handle.net/10197/11116||Date:||9-Nov-2016||Online since:||2019-10-07T14:20:31Z||Abstract:||Physical-layer network coding (PNC) allows to improve the throughput on the two-way relay channel (TWRC). PNC systems using higher-order modulation present some challenges regarding how to design the PNC mapping at the relay. With higher-order modulation it is also desirable to use constellation shaping which allows to minimize the average transmitted energy. In this paper, we show how low-complexity trellis shaping can be used to provide constellation shaping both at the user nodes and at the relay node. The proposed technique works specifically for sign bit shaping and M-ary quadrature amplitude modulation (QAM). Simulation results show that the proposed scheme provides a significantly increased performance in terms of the achievable BER, with 5.3dB shaping gain available at a BER of 10-3 in the case of 256-QAM signaling.||Funding Details:||Science Foundation Ireland||Type of material:||Conference Publication||Publisher:||IEEE||Start page:||250||End page:||254||Copyright (published version):||2016 IEEE||Keywords:||Relays; Quadrature amplitude modulation; Convolutional codes; Network coding; Indexes; Detectors||DOI:||10.1109/ACSSC.2016.7869035||Language:||en||Status of Item:||Peer reviewed||Is part of:||Fiftieth Asilomar Conference on Signals, Systems & Computers, November 6-9 2016, Pacficic Grove, California||Conference Details:||2016 50th Annual Asilomar Conference on Signals, Systems, and Computers (ASILOMAR 2016), California, United States of America, 6-9 November 2016||ISBN:||9781538639542|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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