基于多速率滤波器组的UWB脉冲波束形成方法

王敏; 杨淑媛; 吴顺君

基于多速率滤波器组的UWB脉冲波束形成方法

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出版历程
- 收稿日期: 2005-04-25
- 修回日期: 2005-10-31
- 刊出日期: 2006-12-19

Beamforming of UWB Pulses Based on Multi-rate Filter Bank

摘要

摘要: 在UWB脉冲信号的角度分集接收中，通常的空时处理中通道时延不易精确地控制。该文提出一种适合UWB脉冲信号的基于多速率滤波器组的波束形成方法，避开了时域处理中延迟控制的问题，同时实现了大带宽范围内的均匀一致的频率不变阵列响应。本文具体分析了进行多速率滤波的方式，其优点是滤波器设计简单，运算量与子带数目无关，同时UWB脉冲信号处理的不连续性使得其可以采用比较简单的时域插值算法。仿真实验结果证明了该文方法的可行性和有效性。
- UWB脉冲; 波束形成; 多速率滤波器组; 频率不变响应
Abstract: In usual spatial-time processing for diversity reception of UWB pulses, the channel delays are not easy to be implemented accurately. This paper firstly discusses the principle of UWB pulse array beamforming. Then a beamforming scheme is presented based on multi-rate filter bank, which is suitable for UWB pulse signals. The proposed method avoids the hardness of delays control in time domain, and can obtain the uniform frequency invariant array response in such a wideband for UWB signals. The way of realizing the multi-rate filtering is analyzed in detail, and it proves to be of easy design. Moreover, its computational cost is independent of the number of subbands. Additionally, the discontinuity of UWB pulse signals makes it possible to employ a relatively simple interpolation algorithm in time domain. The simulation results verified the feasibility and the effectiveness of this presented method.

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Hussain M G M. Principles of space-time array processing for ultrawide-band impulse radar and radio communications[J].IEEE Trans. on Vehicular Technology.2002, 51(3):393-403[2]Converse M, Bond E J, Hagness S C. Ultrawide-band microwave space-time beamforming for hyperthermia treatment of breast cancer: A computational feasibility study[J].IEEE Trans. on Microwave Theory and Techniques.2004, 52(8):1876-1889[3]Anderson F, Christensen W, Fullerton L. Ultra-wideband beamforming in sparse arrays, IEE Proc[J].- Microwaves, Antennas and Propagation.1991, 138(4):342-346[4]Collins S A, Anderson B L, Liddle C. True time delay with binarytime delay control for large arrays. in Proc.22nd Annu.. Antenna Applications Symp., Urbana, Sept. 1998: 845-849.[5]Foo S, Kashyap S. Time-domain array factor for UWB antenna array[J].Electronics Letters.2003, 39(18):561-562[6]Dotlic I D. Minimax frequency invariant beamforming[J].Electronics Letters.2004, 40(19):1230-1231[7]Ward D B, Kennedy R A, Williamson R C. Theory and design of broadband sensor arrays with frequency invariant far-field beam patterns[J].J. Acoust. Soc. Amer.1995, 97(5):1023-1034[8]Nordholm S E, Claesson I, Grbic N. Performance limits in subband beamforming[J].IEEE Trans. on Speech and Audio Processing.2003, 11(3):193-203[9]Kennedy R A, Abhayapala T D, Ward D B. Broadband nearfield beamforming using a radial beampattern transformation[J].IEEE Trans. on Signal Processing.1998, 46(8):2147-2156[10]朱维杰, 孙进才. 基于阵列接收数据重采样的频率不变波束形成器. 自然科学进展, 2002, 12(6): 669-672.[11]Tuan-Do-Hong, Russer P. Signal processing for wideband smart antenna array applications[J].IEEE Microwave Magazine.2004, 5(1):57-67[12]陈怀琛. 数字信号处理教程MATLAB释义与实现. 北京:[13]电子工业出版社，2004：250-252.

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