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基于对称阵列Wigner-Ville分布的宽带线性调频信号AOA估计 被引量:3

Angle-of-Arrival Estimation of Wideband Chirp Signals Using The Wigner Ditribution of Symmetrical Sensor Array
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摘要 本文提出了基于对称阵元Wigner-Ville分布(WVD)的宽带线性调频信号到达角(AOA)估计算法。该算法利用对称阵元输出延时参数的互补性和Wigner分布定义提取宽带信号方向向量,建立了新的空间时频矩阵。借助线性调频信号Wigner分布的良好时频聚集特性,适当选取时频点实现了对各个信号AOA的逐一估计。在新的空间时频矩阵模型基础上给出了基于信号子空间投影的AOA估计方法。它不需要对AOA的初始估计、聚汇和插值,减少了计算量,提高了精度,仿真实验证明了算法的有效性。 Recently, the time-frequency techniques have been successfully applied in narrowband direction-of-arrival AOA estimation[1]-[4]. A novel time-frequency approach to direction finding of wideband chirp signals is proposed. Our technique employs the Wigner-Ville distribution(WVD) of symmetrical sensor array to get direction vectors of wideband chirp signals. By time-frequency selectivity, a new data model is constructed to estimate AOA of each signal one by one. A subspace method is exploited to deduce AOA from the new model. The computation cost of our method is low because no focussing or interpolation is needed. Simulation results illustrate the performance of our method.
出处 《信号处理》 CSCD 2003年第2期104-107,共4页 Journal of Signal Processing
关键词 阵列信号处理 宽带线性调频信号 达角估计算法 对称阵列Wigner-Ville分布 chirp signal angle-of- arrival estimation subspace projection
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  • 1陈客松,何子述,韩春林.最佳稀疏直线阵列的分区穷举综合法[J].电子与信息学报,2006,28(11):2030-2032. 被引量:5
  • 2Wang G, Xia X G. Iterative algorit hm for direction of arrival estimation with wideband chirp signals [J]. IEE Proceedings on Radar, Sonar and Navigation, 2000,147 (5) : 233 - 238. 被引量:1
  • 3Gershman A B, Amin M G. Wideband Direction-of-Arrival Estimation of Multiple Chirp Signals Using Spatial Time-Frequency Distributions [J]. IEEE Signal Processing Letters,2000,7(6) :152-155. 被引量:1
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  • 5A B Gershman, M GAmin. Wideband direction of arrival estimation of multiple chirp signals using spatial time-frequency distributions[J].IEEE Signal Processing Lett,2000,7:152-155. 被引量:1
  • 6G Wang, X G Xia. Iterative algorithm for direction of arrival estimation with wideband chirp signals[J]. Proc Inst Elect Eng Radar Sonar Nayig, 2000,147:233-238. 被引量:1
  • 7M D Zoltowski, C P Mathews. Real-time frequency and 2-D angle estimation with sub-Nyquist spatio-temporal sampling[J]. IEEE Trans on SP, 1994,42(10):2781-2794. 被引量:1
  • 8Ke-ji Huang, Da Tian, Tian-qi Chen. Direction-of-arrival estimation of wideband chirp signals using the wigner ditribution of symmetrical sensor array[A]. Proc IEEE International Conference on Communications Circuits and Systems and West Sino Expositions[ 被引量:1
  • 9Shi L,Zhang C L. Algorithm of signal processing withfive channel interferometer [ C ] // Proc. of the Interna-tional Symposium on signals, Systems and Electronics,2010:853-856. 被引量:1
  • 10Wax M,Tie Jun S, Kailath T. Spatiotemporal spectralanalysis by eigenstructure methods [J]. IEEE Trans, onAcoustics, Speech and Signal Processing, 1984,32(8);817-827. 被引量:1

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