多载波OFDM信号识别方法

doi:10.12305/j.issn.1001-506X.2022.11.28

Abstract

Abstract:

Unmanned aerial vehicle (UAV) technology has developed rapidly and is widely used. As the orthogonal frequency division multiplexing (DFDM) signal of UAV measurement and control data transmission, it brings great challenges to civil wireless spectrum management and military non cooperative communication technology. Based on this, an OFDM signal detection and recognition algorithm based on envelope correlation spectrum is proposed. The algorithm mainly uses the time-domain correlation of OFDM signal, calculates the complex envelope correlation spectrum of the signal, detects and judges the discrete periodicity of its correlation spectrum, and realizes the identification of OFDM signal in noncooperative communication. Compared with the detection and recognition algorithm based on high-order cumulant, the proposed algorithm has better adaptability to signal to noise ratio, does not need to set the empirical threshold, and can estimate the bandwidth of subchannel. Simulation results show the effectiveness of the proposed method.

Key words: orthogonal frequency division multiplexing (OFDM), signal recognition, envelope correlation spectrum

CLC Number:

TN911

Liwei ZHU, Zhitao HUANG. Recognition method of multi carrier OFDM signal[J]. Systems Engineering and Electronics, 2022, 44(11): 3522-3528.

Figures/Tables 8

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References 15

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Recognition method of multi carrier OFDM signal

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