| 引用本文: | 宫二玲,王跃科,杨俊,等.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.[点击复制] |
| GONG Erling,WANG Yueke,YANG Jun,et al.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[点击复制] |
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| 基于软件无线电的DS/SS载频跟踪方法 |
| 宫二玲, 王跃科, 杨俊, 董飞鹏 |
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(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。 |
| 关键词: 直接序列扩频 软件无线电 快速跟踪 匹配滤波 |
| DOI： |
| 投稿日期：2002-09-21 |
| 基金项目: |
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| A Method of Carrier Frequency Tracking for DS/SS Based on Software Radio |
| GONG Erling, WANG Yueke, YANG Jun, DONG Feipeng |
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(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. |
| Keywords: DS/SS software radio fast track matched filter |
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