计算机工程与应用2018，Vol.54Issue(2)：82-86,233,6.DOI:10.3778/j.issn.1002-8331.1607-0282
应用MDFT结构的认知无线电频谱感知方法
摘要
Abstract
When used for cognitive radios,the traditional Orthogonal Frequency Division Multiplexing(OFDM)technol-ogy with its drawback of the spectral leakage will not only cause interference between neighboring zone but also reduce the primary user signal detection performance.This paper proposes a multi-band spectral detection scheme based on Modi-fied Discrete Fourier Transform(MDFT)modulated filter bank.The detection probability expression of the cognitive radio system under MDFT modulated filter bank structure is derived.Theoretical analysis and simulation results show that the CR system based on MDFT filter bank has higher stop-band attenuation than the system based on OFDM with using rectangular window function as prototype filter.And with the pedestrian channel of 3GPP TS 25.104 protocol standards, especially at lower SNR,the spectrum sensing performance of the CR system based on MDFT filter bank structure is sig-nificantly improved compared to the system based on OFDM.关键词
改进离散傅里叶变换波器组/频谱感知/认知无线电/正交频分复用Key words
modified discrete Fourier transform filter bank/spectrum sensing/cognitive radio/orthogonal frequency divi-sion multiplexing分类
信息技术与安全科学引用本文复制引用
庄陵,童开蒙,王凯..应用MDFT结构的认知无线电频谱感知方法[J].计算机工程与应用,2018,54(2):82-86,233,6.基金项目
重庆市教委科学技术研究项目(No.KJ1500435,No.KJ1400437). （No.KJ1500435,No.KJ1400437）
