| 星用DS/PM双模应答机的设计与实现 |
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| 引用本文： | 郑林华,袁继兵,李星.星用DS/PM双模应答机的设计与实现[J].国防科技大学学报,2004,26(4):31-36. |
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| 作者姓名： | 郑林华 袁继兵 李星 |
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| 作者单位： | 国防科技大学电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 介绍了星用直扩/调相(DS/PM)双模应答机的组成、功?原理及主要技术指标.提出了一种PM模式精确解调相位的处理方法,大大地提高了PM模式的处理精度和载波的捕获带宽.解决了扩频模式下高动态、低信噪比环境下伪码的初相位捕获和大多谱勒频移环境下的载波同步的实现等关键技术.这些思路和方法对促进航天技术的发展有很好的参考价值.
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| 关 键 词： | 应答机 双模式 扩频 调相 |
| 文章编号： | 1001-2486(2004)04-0031-06 |
| 收稿时间： | 3/5/2004 12:00:00 AM |
| 修稿时间： | 2004年3月5日 |
Design and Implementation of Satellite-based DS/PM Dual-mode Transponder |
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| ZHENG Linhu,YUAN Jibing and LI Xing.Design and Implementation of Satellite-based DS/PM Dual-mode Transponder[J].Journal of National University of Defense Technology,2004,26(4):31-36. |
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| Authors: | ZHENG Linhu YUAN Jibing and LI Xing |
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| Abstract: | The paper introduces the configuration, function, principles and main technical index of the satellite-based direct sequence spread spectrum/phase modulation(DS/PM)dual-mode transponder. An accurate demodulation phase method is presented in PM mode. Obviously the processing precision in PM mode is improved and the capturing bandwidth widened by this means. Some key means are also developed such as capturing the initial phase of Pseudo Noise Code in spread-spectrum mode in the environment of dynamic changes and low SNR, and synchronizing the carrier wave with large Doppler frequency shift. All these ideas and methods are very valuable in developing space technology. |
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| Keywords: | transponder dual-mode spread-spectrum phase modulation |
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