基于互相关的快速角度估计算法

徐成发; 郝宇星; 陆潞; 高梅国

doi:10.11999/JEIT151021

基于互相关的快速角度估计算法

doi: 10.11999/JEIT151021

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出版历程
- 收稿日期: 2015-09-10
- 修回日期: 2016-01-22
- 刊出日期: 2016-06-19

Fast Angle Estimation Algorithm Based on Cross-correlation

摘要

摘要: 在自跟踪接收机中，当输入信噪比较低时，需要通过相参积累来提高信噪比才能获得满意的测角精度。传统提高信噪比的方法为通道内的码捕获算法，需要进行在时间维和多普勒维的2维搜索，必要时还需要进行第3维位跳变的搜索补偿，运算量非常大，无法实现快速测角。该文提出一种基于通道间互相关的相参积累快速测角算法，新算法具有结构简单、运算量低、几乎零延迟的优点，且测角精度可以达到传统相参积累方法的水平，容易满足自跟踪接收机快速测角的要求；理论推导和仿真验证了新算法的有效性。
- 快速角度测量 /
- 互相关 /
- 自跟踪接收机 /
- 干涉仪
Abstract: In the system of auto-tracking receiver, the coherent integration is needed to increase the signal-to-noise ratio so that the angle measuring accuracy can be obtained satisfactorily when signal-to-noise ratio is low. The traditional method to improve the signal-to-noise ratio is the code-acquisition algorithm in channels respectively, which needs to do the two-dimensional searching both in the time and in Doppler dimension. The third dimension bit jump searching is needed when necessary. Therefore, the computation is huge and it can not be used in fast angle estimation cases. In this paper, a kind of coherent integration angle measuring algorithm based on cross- correlation between channels is proposed. The new algorithm has the characteristics of simple structure, low computation, almost zero delay. Meanwhile, the angle measuring accuracy of the new algorithm can be up to the level of the traditional method, and thus can meet the auto-tracking receiver requirement easily. The theoretical derivation and simulation results verify the effectiveness of the new algorithm.
- Fast angle estimation /
- Cross-correlation /
- Auto-tracking receiver /
- Interferometer

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参考文献(28)

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