| The receiving of chirp signals with frequency invariant beam response |
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| 作者姓名： | GUO Yuan-xi WANG Ji-sheng SANG En-fang |
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| 作者单位： | GUO Yuan-xi，WANG Ji-sheng，and SANG En-fang School of Underwater Acoustic Engineering，Harbin Engineering University，Harbin 150001，China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 1 Introduction1 The sensor array and the correlative signal processing methods have been adopted for the ability improvement of detection and orientation in modern sonar systems, and beamforming is a widely used tool in sensor array signal processing for …
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| 关 键 词： | 脉冲 数字信号处理 变量 计算机 |
| 文章编号： | 1671-9433（2006）04-0054-04 |
| 收稿时间： | 2006-03-31 |
The receiving of chirp signals with frequency invariant beam response |
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| GUO Yuan-xi WANG Ji-sheng SANG En-fang.The receiving of chirp signals with frequency invariant beam response[J].Journal of Marine Science and Application,2006,5(4):54-57. |
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| Authors: | Yuan-xi Guo Ji-sheng Wang En-fang Sang |
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| Institution: | (1) School of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, 150001, China |
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| Abstract: | A frequency invariant response algorithm is proposed for getting over the signal distortion in high frequency when the beamformer receives the broadband signals. In this method, the weight vector of the reference beam pattern is designed firstly, then the weight vectors when the beam response in the frequency sub-bands approaching the reference response mostly are computed by optimized method or adaptive method. By this method, the beam pattern in each sub-band can be almost kept invariable. As a result, the receiving chirp signal can be improved. Owing to the adoption of the adaptive method to approach the optimized vectors, it has no restricting of the array format and the element directivity, and the method can be used widely. |
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| Keywords: | beamforming broadband signal processing frequency invariant beam response chirp sonar |
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