短波单站一维定位性能分析及验证

doi:10.11959/j.issn.1000-0801.2018228

摘要/Abstract

摘要：

针对波束域算法分辨率低和高分辨空间谱估计算法对噪声敏感而导致的复杂电磁环境下定位精度低的问题，提出一种Capon和Root-MUSIC的联合算法（CRMU），用于短波单站一维定位技术的研究。该算法不仅能避免谱峰搜索带来的高运算量，还能在实际探测中，抑制噪声对信号的影响，从而降低方位角估计均方根误差。在仿真模型中，CRMU算法的输出方位角角度估计的均方根误差至少比Root-MUSIC算法小0.2°。在短波单站一维定位实际应用中，CRMU算法的定位误差均在3%以下，满足了定位误差5%以内的实际工程需求。

关键词: 定位技术, 短波单站定位, 空间谱估计, 波达方向估计

Abstract:

With the low sensitivity of beam field and noise-sensitive of high resolution spatial spectrum algorithm,the low location precision under the complex electromagnetic environment becomes a severe problem.The Capon and Root-MUSIC (CRMU) joint algorithm was proposed to research the one-dimensional location technology.The proposed algorithm could not only avoid the high operation caused by the peak search but also suppress the noise,which contributed to reduce the root mean square error (RMSE) of azimuth.Then,the simulation results demonstrate that the RMSE of the proposed algorithm is at least 0.2 degrees less than that of the Root-MUSIC algorithm.In addition,the location error of the proposed algorithm is less than 3% in the practical application of one-dimensional location of shortwave single station,which satisfies the demand that the location error should be below 5%.

Key words: location technology, short wave single station location, spatial spectrum estimation, DOA estimation

李婷. 短波单站一维定位性能分析及验证[J]. 电信科学, 2018, 34(9): 111-117.

Ting LI. Analysis and verification on one-dimensional location performance of shortwave single station[J]. Telecommunications Science, 2018, 34(9): 111-117.

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地点	经纬度	频率/MHz	大圆距离/km	方位
河北石家庄	东经：114^°28′，北纬：38^°04′	9.5	933	323°
北京	东经：116^°27′，北纬：39^°57′	15.5	1 016	338°
陕西蒲城	东经：109^°33′，北纬：34^°57′	10	1 130	293°

地点	频率/MHz	PE_Root MUSIC	PE_CRMU
河北石家庄	9.5	5.29%	2.6%
北京	15.5	4.87%	1.9%
陕西蒲城	10	6.39%	2.9%