Discrete Signaling and Treating Interference as Noise for the Gaussian Interference Channel

被引:10
作者
Qiu, Min [1 ]
Huang, Yu-Chih [2 ]
Yuan, Jinhong [1 ]
机构
[1] Univ New South Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia
[2] Natl Yang Ming Chiao Tung Univ, Inst Commun Engn, Hsinchu 30010, Taiwan
基金
澳大利亚研究理事会;
关键词
Tin; Interference; Signal to noise ratio; Interference channels; Encoding; Decoding; Receivers; Interference channel; discrete inputs; treating interference as noise; INTERCELL INTERFERENCE; CAPACITY; OPTIMALITY; REGION; UPLINK; ALIGNMENT; NETWORKS; BOUNDS;
D O I
10.1109/TIT.2021.3111551
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The two-user Gaussian interference channel (G-IC) is revisited, with a particular focus on practically amenable discrete input signalling and treating interference as noise (TIN) receivers. The corresponding deterministic interference channel (D-IC) is first investigated and coding schemes that can achieve the entire capacity region of the D-IC under TIN are proposed. These schemes are then systematically translated into multi-layer superposition coding schemes based on purely discrete inputs for the real-valued G-IC. Our analysis shows that the proposed scheme is able to achieve the entire capacity region to within a constant gap for all channel parameters. To the best of our knowledge, this is the first constant-gap result under purely discrete signalling and TIN for the entire capacity region and all the interference regimes. Furthermore, the approach is extended to obtain coding schemes based on discrete inputs for the complex-valued G-IC. For such a scenario, the minimum distance and the achievable rate of the proposed scheme under TIN are analyzed, which takes into account the effects of random phase rotations introduced by the channels. Simulation results show that our scheme is capable of approaching the capacity region of the complex-valued G-IC and significantly outperforms Gaussian signalling with TIN in various interference regimes.
引用
收藏
页码:7253 / 7284
页数:32
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