Performance analysis of spectrum sensing of frequency-hopping signals under fading channels

被引：0
|
作者：
Chen Z. [1 ]
Cheng G. [1 ]
Sun Z. [1 ]
Sun R. [1 ]
机构：
[1] College of Information and Communication Engineering, Harbin Engineering University, Harbin
来源：
Sun, Zhiguo (sunzhiguo@hrbeu.edu.cn) | 2021年 / Editorial Board of Journal of Harbin Engineering卷 / 42期
关键词：
Cognitive radio; Fading channel; Frequency-hopping signals; Hopping position; Optimal threshold; Short-time Fourier transform; Signal presence; Spectrum sensing;
D O I：
10.11990/jheu.202006021
中图分类号：
学科分类号：
摘要：
As a technique in the field of cognitive radio, spectrum sensing can effectively identify spectrum holes and provide a priori information for the dynamic access of secondary users. In this paper, a new mathematical model of spectrum sensing system is established for frequency-hopping signals. Through short-time Fourier transform analysis, blind sensing can be performed when only a set of frequency-hopping frequencies is known, and the hopping point can be detected without channel division. The position of the hopping point and signal presence are detected simultaneously. In three different fading channels of AWGN, Rayleigh, and Nakagami-m, the theoretical closed-form expressions of the detection probability and false-alarm probability are derived. This avoids the complexity brought about by the traditional method that requires multiple Monte Carlo simulations to determine the threshold. In addition, the optimal threshold is obtained by minimizing the error probability, and the correctness is verified via simulation results. Copyright ©2021 Journal of Harbin Engineering University.
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页码：902 / 907
页数：5
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