| 基于软件无线电的DS/SS载频跟踪方法 |
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| 引用本文： | 宫二玲,王跃科,杨俊,董飞鹏. 基于软件无线电的DS/SS载频跟踪方法[J]. 国防科技大学学报, 2003, 25(1): 68-71 |
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| 作者姓名： | 宫二玲 王跃科 杨俊 董飞鹏 |
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| 作者单位： | 国防科技大学机电工程与自动化学院,湖南,长沙,410073 |
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| 摘 要： | 扩频序列的精确同步是接收机正确解扩的关键问题。提出一种基于软件无线电技术,对DS/SS载频偏移量实现快速跟踪的数值算法,并讨论了实现步骤及估计性能。该算法具有三个优点:(1)可消除载频初始相位的影响。(2)适于极低信噪比条件下的载波跟踪。(3)算法简便,易于实现。仿真及实验均验证了此算法的可行性。
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| 关 键 词： | 直接序列扩频 软件无线电 快速跟踪 匹配滤波 |
| 文章编号： | 1001-2486(2003)01-0068-04 |
| 收稿时间： | 2002-09-21 |
| 修稿时间： | 2002-09-21 |
A Method of Carrier Frequency Tracking for DS/SS Based on Software Radio |
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| GONG Erling,WANG Yueke,YANG Jun and DONG Feipeng. A Method of Carrier Frequency Tracking for DS/SS Based on Software Radio[J]. Journal of National University of Defense Technology, 2003, 25(1): 68-71 |
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| Authors: | GONG Erling WANG Yueke YANG Jun DONG Feipeng |
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| Affiliation: | College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China;College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China;College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China;College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | The accurate synchronization is a key technique for the receiver to despread correctly. A new algorithm based on software radio is proposed to track the carrier frequency offset fast. Its realization steps and estimation performance are also discussed. This algorithm gains three advantages: (1) The influence of carrier frequency's initial phase is dismissed. (2) It can be used in signals with very low signal-to-noise ratio. (3) It is easy to implement because of its simple structure. The results of the simulation and test show the feasibility of the algorithm. |
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| Keywords: | DS/SS software radio fast track matched filter |
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