Blind Modulation Classification for OFDM in the Presence of Carrier Frequency Offsets

被引：0

作者：

Liu, Mingqian ^{[1
]}

Guo, Fei ^{[1
]}

Chen, Yunfei ^{[2
]}

Zhao, Nan ^{[3
]}

机构：

[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian 710071, Shaanxi, Peoples R China

[2] Univ Durham, Dept Engn, South Rd, Durham DH1 3LE, England

[3] Dalian Univ Technol, Sch Informat & Commun Engn, Dalian 116024, Peoples R China

来源：

ICC 2023-IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS | 2023年

基金：

中国国家自然科学基金;

关键词：

Carrier frequency offset; green communication; OFDM; modulation classification; multipath channels;

D O I：

10.1109/ICC45041.2023.10279377

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In the orthogonal frequency division multiplexing (OFDM) systems, inter-carrier interference (ICI) caused by carrier frequency offset (CFO) is considered to be one of the most crucial problems for OFDM over multipath channels, which will bring difficulties in the modulation classification of OFDM. In order to deal with the influence of ICI on subcarrier modulation classification, this paper presents a novel blind modulation classification method of OFDM systems with CFO over multipath channels. The virtual subcarrier signals and the pilot subcarrier signals with CFO are classified by using the second-order moment, and then the modulation subcarriers are classified with the fourth-order cumulants and the sixth-order cumulants. Simulations are conducted to verify the proposed method not only has a good classification performance, but also has a low computational complexity. The proposed method can reduce energy consumption and is beneficial for green radios.

引用

页码：4683 / 4688

页数：6

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