| 基于波束优化设计的宽带相干信号子空间算法 |
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| 引用本文： | 唐建生,孙超.基于波束优化设计的宽带相干信号子空间算法[J].系统工程与电子技术,2006,28(6):837-839. |
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| 作者姓名： | 唐建生 孙超 |
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| 作者单位： | 西北工业大学声学工程研究所,陕西,西安,710072 |
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| 摘 要： | 提高波束域宽带相干信号子空间算法(BCSSM)在低信噪比下的估计性能,并降低其运算量,是BC-SSM在实际系统中得到应用的关键。借助于优化方法,设计具有低旁瓣和恒定束宽特征的时域宽带波束形成器来实现预形成宽带波束,在保证宽带信号无失真接收的同时,能够有效抑制干扰,从而提高了BCSSM在低信噪比下的估计性能。宽带波束形成器采用数字延迟线和FIR滤波器相结合的结构,减少了设计所需FIR滤波器的阶数,显著降低了算法的运算量。设计实例和仿真结果证明了所提方法的有效性。
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| 关 键 词： | 恒定束宽 宽带相干信号 波束优化设计 |
| 文章编号： | 1001-506X(2006)06-0837-03 |
| 修稿时间： | 2005年4月21日 |
Optimum wideband beamformer design for beamspace coherent signal subspace method |
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| TANG Jian-sheng,SUN Chao.Optimum wideband beamformer design for beamspace coherent signal subspace method[J].System Engineering and Electronics,2006,28(6):837-839. |
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| Authors: | TANG Jian-sheng SUN Chao |
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| Abstract: | An optimum wideband beamformer design method is proposed to improve the performance of the BCSSM(beamspace coherent signal subspace method) at low SNR(signal noise ratio) and reduce the computational load.In the method,time-domain wideband beamformers with characteristics of constant beamwidth and low sidelobe are designed to preprocess wideband signals without any distortion and suppress interferences effectively.A combination of FIR(finite impulse response) filters and digital delay lines is used in the beamformer structure to reduce the order of FIR filters.Simulation results show that the proposed method can reduce the computational load and improve the performance of BCSSM at low SNR,compared with conventional;optimum design of beamformer |
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| Keywords: | constant beamwidth beamspace coherent signal optimum design of beamformer |
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