Wideband Spectrum Sensing Based on Reconfigurable Filter Bank in Cognitive Radio

被引：2
|
作者：
Wang, Huan [1 ,2 ]
Wu, Bin [2 ]
Yao, Yuancheng [2 ]
Qin, Mingwei [2 ]
机构：
[1] China Acad Engn Phys, Inst Elect Engn, Mianyang 621900, Sichuan, Peoples R China
[2] Southwest Univ Sci & Technol, Sch Informat Engn, Mianyang 621010, Sichuan, Peoples R China
来源：
FUTURE INTERNET | 2019年 / 11卷 / 11期
关键词：
reconfigurable filter bank; adjustable resolution; energy detection; wideband spectrum-sensing;
D O I：
10.3390/fi11110244
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In order to ease the conflict between the bandwidth demand of high-rate wireless communication and the shortage of spectrum resources, a wideband spectrum sensing method based on reconfigurable filter bank (RFB) with adjustable resolution is presented. The wideband signals are uniformly divided into multi-narrowband signals by RFB, which is designed by polyphase uniform Discrete Fourier Transform (DFT) modulation, and each sub-band is sensed by energy detection. According to the idle proportion of detected sub-bands, the number of RFB sub-bands is reset in next spectrum-sensing time. By simulating with collected wideband dataset, the influence of filter bank sub-bands number and idle state proportion on the sensing results is analyzed, and then on the basis of the trade-off between spectrum-sensing resolution and computational complexity, the optimal sub-bands number of filter bank is selected, so as to improve the detection performance and save resources.
引用
收藏
页数：13
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