| Time-domain programmable digital multi-beamforming system |
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| 引用本文： | SUN Changyu, LI Qihu, SUN Zeng, QIAO Jun and LIU Zhengyuan(Institute of Acoustics,Academia Sinica,Beijing 100080). Time-domain programmable digital multi-beamforming system[J]. 声学学报：英文版, 1996, 0(3) |
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| 作者姓名： | SUN Changyu LI Qihu SUN Zeng QIAO Jun and LIU Zhengyuan(Institute of Acoustics Academia Sinica Beijing 100080) |
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| 作者单位： | Institute of Acoustics，Academia Sinica，Beijing 100080 |
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| 摘 要： | I.lntroductionltiswellknownthatthebeamformingisakeylinkinthesignalprocessingsystemofsonar,radar,exPlorationofundergroundresouxces,monitoringofseismicwaveandsoonref.[1-4].owingtotheofthelimitedspace,thispapermainlydiscussesthebeamforminginvolvedinsonarsystem.Regardlessofthepassiveoractivesonar,analogordigitalsonar,theremustbeabeamformingsystem,thepurposeistoacquirethehigherspatialgain,andinthemeantime,toobtaintheresolutionwithhigherprecisionforthesystem.So,thebeamformingsystemisa8igIilficanfact…
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Time-domain programmable digital multi-beamforming system |
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| SUN Changyu, LI Qihu, SUN Zeng, QIAO Jun and LIU Zhengyuan. Time-domain programmable digital multi-beamforming system[J]. Chinese Journal of Acoustics, 1996, 0(3) |
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| Authors: | SUN Changyu LI Qihu SUN Zeng QIAO Jun LIU Zhengyuan |
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| Abstract: | A new beamforming method in time-domain is described in this paper. Based on the pipe line architecture, the variable digital filtering algorithm, rising sampling rate (interpolation), down-sampling rate (decimation), and optimum weighting are combined. The high accuracy time-delay compensation for multi-beam signal processing system is designed by high speed RAM (Random Access Memory) and VLSI (Very Large Scale Integrated) DSP (Digital Signal Processing) chips. Comparing with the traditional beamforming method, the new method presented in this paper is highly accurate, less complex in computation, easy progranunable and have compact hardware architecture. The design philosophy of time-domain RAM-dynamic bearnforming method and hardware implementation is given. |
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| Keywords: | Time-domain multi-beamforming Variable digital filter Interpolation Decimation Timedelay compensation |
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