| 利用帧头消除测距时标整周期滑动的方法 |
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| 引用本文： | 党群,姚通,张炳军.利用帧头消除测距时标整周期滑动的方法[J].信息安全与通信保密,2011(3):47-48,51. |
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| 作者姓名： | 党群 姚通 张炳军 |
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| 作者单位： | 1. 西北工业大学365研究所,陕西,西安,710072
2. 中国石油技术开发公司,北京,100009 |
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| 基金项目： | 陕西省2010年度工业攻关项目资助 |
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| 摘 要： | 在弹载扩频脉冲应答式测距系统中,应答机直接利用捕获脉冲作为时标信号进行测距。此法在高信噪比时测距精度较高,但在低信噪比时,伪码同步脉冲的抖动较大,同时捕获脉冲会产生整数个伪码周期地滑动,导致测距误差较大。为了提高测距精度,提出了一种利用帧头消除脉冲应答式测距时标整周期滑动并降低时钟抖动的方法。在获得伪码捕获脉冲并检测到帧头后,应答机才启动应答信号,可有效降低低信噪比时的测距误差。
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| 关 键 词： | 测距时标 整周期滑动 时钟抖动 |
The Elimination of Integer-period Ranging Timescale Slidingby Using Frame Head and Reducing Jitter Clock |
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| DANG Oun,YAO Tong,ZHANG Bing-jun.The Elimination of Integer-period Ranging Timescale Slidingby Using Frame Head and Reducing Jitter Clock[J].China Information Security,2011(3):47-48,51. |
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| Authors: | DANG Oun YAO Tong ZHANG Bing-jun |
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| Institution: | DANG Qun1,YAO Tong1,ZHANG Bing-jun2(1No.365 Institute,Northwest Polytechnical University,Xi'an Shaanxi 710072,China,2China Petroleum Technology & Development Corporation,Beijing 100009,China) |
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| Abstract: | In missile-borne spread spectrum pulse transponder distance measurement system,transponder measures distance by using the acquisition pulse as timescale.It could achieve high accuracy of distance measurement at high SNR.But at low SNR,with the pseudo-code synchronous pulse jitters and the capture pulse produces an integer number of PN code cycle slide,the distance measurement would result in large ranging error.A method is proposed,thus to eliminate the integerperiod ranging timescale sliding by using frame... |
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| Keywords: | ranging timescale integer-period sliding clock jitter |
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