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分数阶Fourier域宽带LFM信号DOA估计的克拉美·罗界

The Cramer-Rao Bound of DOA Estimation of Wideband LFM Signals in Fractional Fourier Domains
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摘要 针对宽带LFM信号的DOA估计问题,从宽带LFM信号模型的描述入手提出且详细分析了在该模型下基于分数阶Fourier变换的DOA估计算法.并以计算机仿真实验结果为依据,表明该算法与时频-相干信号子空间算法相比,该算法具有较高的估计精度,且随着信号源信噪比的增加,算法的估计方差越来越接近其克拉美.罗下界. In allusion to the DOA estimation of wideband LFM signal, following the description of the wideband LFM signal model, the Cramer-Rao Bound（CRB） of DOA estimation based on fractional Fourier transform with this data model is analyzed in this paper. Theoretical analysis and simulation results show that, comparing to the time- frequency coherent signal-subspace method, this algorithm can obtain better angle estimation performance, and variance of estimate is more and more achiving CRB with increasing of SNR.
作者 张艳红 郭海鸥 李金铭
机构地区 河南教育学院电路与系统重点学科
出处 《河南大学学报（自然科学版）》 CAS 北大核心 2008年第3期316-318,共3页 Journal of Henan University:Natural Science
基金 郑州市科技攻关项目(064STRF40278-2)
关键词 分数阶FOURIER变换 LFM信号 DOA估计 克拉美.罗界 fractional fourier transform LFM signal DOA estimaiton Cramer-Rao Band
分类号 TN911 [电子电信—通信与信息系统]
  • 相关文献

参考文献8

  • 1Amin M G. Spatial Time Frequency distributions for direction finding and blind source separation [C]. In Proc. SPIE, 1999, 723: 62-70.
  • 2Amin M G. Time-Frequency MUSIC [J]. IEEE Signal Processing Letters, May 1999, 6(5):109-110.
  • 3Zhang Y, Mu W and Amin M G. Time-Frequency maximum likelihood methods for direction finding [J]. Franklin Inst. , July 2000, 337(4) : 483-497.
  • 4Wang G and Xia X G. herative algorithm for direction of arrival estimation with wideband chirp signals [C]. In Proc. Inst. Elect. Eng. Radar, Sonar, Navig, Oct. 2000, 147:233-238.
  • 5Gershman A B and Amin M G.. Wideband Direction- of-Arrival Estimation of Multiple Chirp Signals Using Spatial Time- Frequency Distributions [J]. IEEE Signal Processing Letters, June 2000, 7(6) : 152-155.
  • 6张艳红,齐林,穆晓敏,陶然.基于分数阶傅立叶变换的WLFM信号DOA估计[J].信号处理,2005,21(z1):57-60. 被引量：7
  • 7Stoica P and Nehorai A. MUSIC Maximum likelihood and Cramer-Rao bound [J]. IEEE Trans. ASSP, 1989, 37(5) :720 -741.
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二级参考文献11

  • 1[1]Moeness G. Amin. Spatial Time-Frequency distributions for direction finding and blind source separation. In Proc.SPIE, 1999, 723: 62-70.
  • 2[2]Moeness G. Amin. Time-Frequency MUSIC. IEEE Signal Processing letters, May 1999,6(5).
  • 3[3]Alex B. Gershman and Moeness G. Amin. Wideband Direction-of-Arrival Estimation of Multiple Chirp Signals Using Spatial Time-Frequency Distributions. IEEE Signal Processing letters, June 2000,7(6).
  • 4[4]Moeness G. Amin. Coherent wideband DOA estimation of Multiple FM Signals using Spatial Time-Frequency distributions. IEEE Signal Processing letters, 2000.
  • 5[5]Moeness G. Amin. Polarimetric Time-Frequency MUSIC in Coherent Signal Environment. IEEE Signal Processing letters, 2003.
  • 6[6]Yimin Zhang, M GAmin. Spatial averaging of TimeFrequency distributions for signal recovery in uniform linear arrays. IEEE Trans. Signal Processing, 2000,48(10): 2892-2902.
  • 7[7]Yimin Zhang, Weifeng Mu and M GAmin. Subspace analysis of spatial Time-Frequency distributions matrices.IEEE Trans. Signal Processing, 2001, 49(4): 747-758.
  • 8[8]Y. Zhang, W. Mu and M. G. Amin. Time-Frequency maximum likelihood methods for direction finding. J.Franklin Inst, July 2000, 337(4): 483-497.
  • 9[9]Namias V. The fractional Fourier transform and its application in quantum mechanics. J Inst Appl Math,1980, 25: 241-265.
  • 10[10]D. A. Linebarger, R. D. DeGroat and E. M. Dowling.Efficient direction-finding methods employing forwardbackward averaging. IEEE Trans. Signal Processing,Aug. 1994, 42: 2136-2145.

共引文献6

河南大学学报（自然科学版）
2008年 第3期

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