数据采集与处理2017，Vol.32Issue(5)：1034-1043,10.DOI:10.16337/j.1004-9037.2017.05.021
基于信号采样自相关的步进宽带频谱感知方法
Step-by-Step Wideband Spectrum Sensing Method Based on Signal Sample Autocorrelation
摘要
Abstract
The bandwidth of spectrum sensing can be enlarged in software radio platform by using multistep frequency domain energy detection.Nevertheless,the energy detection is sensitive to noise uncertainty,and signal sample autocorrelation method is robust to it.To improve the detection performance of software radio,a step-by-step wideband spectrum sensing method based on signal sample autocorrelation is proposed.Firstly,the principle of signal sample autocorrelation and a step-by-step wideband spectrum sensing procedure based on it are described.Then,the whole procedure for wideband spectrum sensing using MATLAB is simulated.The simulation results demonstrate that our proposed method can achieve the required detection performance under different signal-noise ratio (SNR).In addition,to balance the bandwidth resolution and the detection speed,we further propose to apply variable step values in two stages of wideband spectrum sending based on signal sample autocorrelation detection,which can obtain higher detection resolution of the frequency bandwidth and shorter detection time.关键词
软件无线电/频谱感知/采样自相关/信号检测/检测性能Key words
software radio/spectrum sensing/sample autocorrelation/signal detection/detection performance分类
信息技术与安全科学引用本文复制引用
陈露,伍小芹,白勇..基于信号采样自相关的步进宽带频谱感知方法[J].数据采集与处理,2017,32(5):1034-1043,10.基金项目
国家自然科学基金(61561017,61261024)资助项目 （61561017,61261024）
海南省自然科学基金(ZDKJ2016015)资助项目. （ZDKJ2016015）
