太赫兹科学与电子信息学报2016，Vol.14Issue(5)：695-700,6.DOI:10.11805/TKYDA201605.0695
面向DS/FH信号的循环平稳空时频测向算法
Cyclostationary spatial time-frequency DOA estimation algorithm for DS/FH signal
摘要
Abstract
Direct Sequence/Frequency Hopping(DS/FH) signal composed by Direct Sequence Spread Spectrum(DSSS) and Frequency Hopping Spread Spectrum(FHSS) decreases the power density dramatically on time-frequency plane, and increases the estimation error of Direction-Of-Arrival(DOA) when classic TF-MUSIC(Time Frequency-Multiple Signal Classification) algorithm is applied in this circumstance. A novel scheme modified from classic TF-MUSIC algorithm is developed to resolve the problem. Firstly, the variable core function is designed on the parameters which character the DS/FH signal on time-frequency plane. Secondly, the cyclostationary frequency of DS/FH signal is estimated to construct the corresponding spatial covariance matrix. The modified algorithm is called Cyclostationary Variable Core Function TF-MUSIC(CVCFTF-MUSIC) algorithm. Simulation results validate that the proposed algorithm can increase the estimation precision of DOA estimation.关键词
扩频/跳频信号/循环平稳分析/时频分析/入射角估计Key words
Direct Sequence/Frequency Hopping/cyclostationary analysis/time-frequency analysis/Direction-Of-Arrival estimation分类
信息技术与安全科学引用本文复制引用
卢树军,王世练,朱江..面向DS/FH信号的循环平稳空时频测向算法[J].太赫兹科学与电子信息学报,2016,14(5):695-700,6.基金项目
航天支撑技术基金资助项目(基于空时频分析和压缩感知的空间谱估计测向定位高效算法研究)；国家自然科学基金资助项目(61101097)；武器装备预先研究基金资助项目(9140A25030113KG01359)；抗干扰通信国家重点实验室基金资助项目(9140C0202011003) （基于空时频分析和压缩感知的空间谱估计测向定位高效算法研究）
