Denoising Higher-Order Moments for Blind Digital Modulation Identification in Multiple-Antenna Systems

被引:11
作者
Kharbech, Sofiane [1 ,2 ]
Simon, Eric Pierre [1 ]
Belazi, Akram [3 ]
Xiang, Wei [4 ,5 ]
机构
[1] Univ Lille, CNRS, Lab IEMN IRCICA, UMR 8520, F-59100 Lille, France
[2] Tunis El Manar Univ, Lab SysCom ENIT LR 99 ES21, Tunis 1002, Tunisia
[3] Tunis El Manar Univ, Lab RISC LR 16 ES07, Tunis 1002, Tunisia
[4] James Cook Univ, Coll Sci & Engn, Cairns, Qld 4870, Australia
[5] Beijing Informat Sci & Technol Univ, Beijing 100192, Peoples R China
基金
北京市自然科学基金;
关键词
Noise reduction; MIMO communication; Receiving antennas; Estimation; Digital modulation; Higher order statistics; Cognitive radio; modulation identification; higher-order statistics; multiple-antenna systems; denoising features; CLASSIFICATION;
D O I
10.1109/LWC.2020.2969157
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This letter proposes a new technique that substantially improves blind digital modulation identification (DMI) algorithms that are based on higher-order statistics (HOS). The proposed technique takes advantage of noise power estimation to make an offset on higher-order moments (HOM), thus getting an estimate of noise-free HOM. When tested for multiple-antenna systems, the proposed method outperforms other DMI algorithms, in terms of identification accuracy, that are based only on cumulants or do not consider HOM denoising, even for a receiver with impairments. The improvement is achieved with the same order of complexity of the common HOS-based DMI algorithms in the same context.
引用
收藏
页码:765 / 769
页数:5
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