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基于无线电测向的台站定位 总被引:7,自引:2,他引:5
无线电定位技术有看广泛的应用前景,基于无线电测向的台站定位,推导出了平面和球面双站定位算法,给出了多站定位算法,并对以上算法进行了实例计算,验证了算法的正确性。平面和球面台站定位算法对于台站定位有很好的实用性,尤其是球面定位算法对于提高定位精度有很大的作用。 相似文献
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Traditional approaches of spatial spectral estimation are usually based on the second-order statistics. The higher-order cumulants and the poly-spectrum contain more information and are capable of reducing the Gaussian noise. In this paper, we present a new spectrum estimation method for direction-finding, the FOMUSIC algorithm, which is based on the eigen-structure analysis of the fourth-order cumulants. The derivation of the algorithm is given in detail and its performance is illustrated by both the computer simulations and the experiments of a direction-finding system. The obtained results demonstrate that the fourth-order cumulants based method outperforms the traditional methods, especially when the noise is an unknown colored one. 相似文献
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在日益复杂的空间电磁环境下,如何解决在频谱监测任务中遇到的新问题?本文重点介绍在复杂电磁环境下无线电监测任务中遇到的新挑战以及相应的解决方案,例如,可以实现同频信号分离的空间谱估计测向技术、时差定位技术以及利用室外小型监测站构建分布式监测网等。 相似文献
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基于四阶累积过的阵列扩展 总被引:10,自引:1,他引:9
在阵列测向问题中应用高阶累积量除了信息利用更充分和抑制高斯噪声等优点之外还具有阵列扩展的功能.本文推导了基于四阶累积量的阵列扩展方法,研究了虚拟阵的结构.放宽了协方差方法对信源数目的限制.但该方法在窄带多信号方向估计应用中存在局限.本文还推导了四阶相干问题和阵列扩展的限制条件.最后给出了实验举例. 相似文献
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Most of the descent methods developed so far suffer from the computational burden due to a sequence of constrained quadratic subproblems which are needed to obtain a descent direction. In this paper we present a class of proximal-type descent methods with a new direction-finding subproblem. Especially, two of them have a linear programming subproblem instead of a quadratic subproblem. Computational experience of these two methods has been performed on two well-known test problems. The results show that these methods are another very promising approach for nondifferentiable convex optimization. 相似文献
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在空间谱估计测向系统中,各接收通道中的幅相失配和天线阵元间的互耦是导致测向精度和分辨率下降的主要原因。本文分析了这两种因素影响测向系统性能的机制,提出了一种可一次性补偿接收通道的幅相失配和阵元间互耦的有效方案。 相似文献
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