| 消除相位翻转影响的扩频信号捕获方法 |
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| 作者姓名： | 王磊 |
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| 作者单位： | 中国民航大学 智能信号与图像处理天津市重点实验室, 天津 300300 |
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| 基金项目： | 国家自然科学基金(61172112,61179064)、中央高校科研基金(ZXH2012M006)和中国民航大学科研启动基金(07QD03X)资助 |
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| 摘 要： | 分析相位翻转在直接序列扩频(DSSS)系统信号捕获过程中的影响,分别给出相位翻转对码相位和载波多普勒频率估计影响的数学分析,提出2种能够消除相位翻转影响的DSSS信号捕获算法.与部分相关累加方法相比,延迟共轭相乘方法的捕获性能更加稳定.2种方法均适用于需要考虑相位翻转问题的DSSS系统.
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| 关 键 词： | 捕获 相位翻转 扩频 |
| 收稿时间： | 2014-02-20 |
| 修稿时间： | 2014-04-24 |
A DSSS signal acquisition algorithm in presence of phase shift |
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| Authors: | WANG Lei |
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| Institution: | Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China |
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| Abstract: | The problem of DSSS signal acquisition in presence of phase shift is analyzed and discussed. Firstly, our work focuses on the impact of the code phase and Doppler frequency estimation due to the modulated data. Then, two acquisition methods are discussed, and they can be used to overcome the impact of the phase shift. Compared to the sectional correlative accumulation algorithm, the approach of the delay and conjugate multiplication provides more stable performance. Simulation results show that the algorithms proposed here are able to capture the DSSS signal when the conventional algorithms fail due to the modulated data. |
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| Keywords: | acquisition phase shift spread spectrum |
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