| 时延-多普勒频移对伪码捕获影响的性能分析 |
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| 引用本文： | 王立冬,胡卫东,郁文贤. 时延-多普勒频移对伪码捕获影响的性能分析[J]. 系统工程与电子技术, 2001, 23(6): 79-81 |
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| 作者姓名： | 王立冬 胡卫东 郁文贤 |
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| 作者单位： | 国防科技大学 |
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| 摘 要： | 在扩频信号处理中，伪码的捕获一般通过相关来实现。以m序列为研究对象，首先针对一种典型的相关过程分析了其时延、多普勒频移对相关的联合影响，结论表明两者耦合影响非常小，几乎可忽略不计。在此基础上提出另一种利用FFT进行能量积累的伪码捕获方法，该方法相对一般相关可对多普勒进行补偿，并可得到时延-多普勒频移的联合二维估计。
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| 关 键 词： | 信号处理 时延 多普勒雷达 补偿 |
| 文章编号： | 1001-506X(2001)06-0079-03 |
| 修稿时间： | 2000-07-07 |
Performance Analysis ofDelay-Doppler Effect in Acquisition of PN Code |
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| Wang Lidong,HU Weidong,YU Wenxian. Performance Analysis ofDelay-Doppler Effect in Acquisition of PN Code[J]. System Engineering and Electronics, 2001, 23(6): 79-81 |
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| Authors: | Wang Lidong HU Weidong YU Wenxian |
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| Affiliation: | Wang Lidong Hu Weidong Yu Wenxian ATR Key Lab.,National University of Defense Technology,Changsha 410073 |
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| Abstract: | In spread-spectrum signal processing,acquisition of pseudonoise(PN)code is commonly implemented by correlation of PN code. In this paper,the effect of time-delay and Doppler frequency in acquisition of PN code is analyzed, using maximal-length shift register sequence as research object. It is shown that delay-Doppler cross effect is neglectable in most cases. Furthermore, an acquisition method of PN code using FFT to accumulate energy is presented. The method can compensate Doppler frequency,and two-dimensional joint estimate of delay-Doppler can be obtained. |
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| Keywords: | Signal processing Time delay Doppler radar Compensation |
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