Hybrid BP-EP based iterative receiver for faster-than-nyquist with index modulation

Yunsi Ma, Nan Wu*, Weijie Yuan, Hua Wang

*此作品的通讯作者

科研成果: 书/报告/会议事项章节会议稿件同行评审

3 引用 (Scopus)

摘要

Faster-than-Nyquist (FTN) signaling with index modulation (IM) is an attractive non-orthogonal transmission scheme characterized by high spectral efficiency and energy efficiency. In this paper, we develop a hybrid belief propagation (BP) and expectation propagation (EP) based iterative receiver for FTN-IM systems. To approach the optimal maximum a posteriori (MAP) receiver, we derive the factorization of marginal posterior probability and construct the corresponding factor graph by ignoring trivial interferences. To address the inherent colored noise imposed by FTN signaling, we employ autoregressive (AR) model to approximate the correlated noise samples. To further design low-complexity parametric message passing receiver, we resort to expectation propagation (EP) to derive Gaussian approximation of discrete transmitted symbols containing specific inactivated zeros. As a result, the overall complexity grows linearly with the number of transmitted symbols. Simulation results show that the coded FTN-IM system relying on the proposed iterative receiver can improve the spectral efficiency up to 43% without performance loss. For identical spectral efficiency with the Nyquist counterpart, FTN-IM signaling achieves 0.80 dB performance gain with proper packing factor and coding rate.

源语言英语
主期刊名2019 IEEE 90th Vehicular Technology Conference, VTC 2019 Fall - Proceedings
出版商Institute of Electrical and Electronics Engineers Inc.
ISBN(电子版)9781728112206
DOI
出版状态已出版 - 9月 2019
活动90th IEEE Vehicular Technology Conference, VTC 2019 Fall - Honolulu, 美国
期限: 22 9月 201925 9月 2019

出版系列

姓名IEEE Vehicular Technology Conference
2019-September
ISSN(印刷版)1550-2252

会议

会议90th IEEE Vehicular Technology Conference, VTC 2019 Fall
国家/地区美国
Honolulu
时期22/09/1925/09/19

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