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通过对乌兰韦伯测向系统的研究,将其用圆天线阵等效成一排直线阵进行测向的传统方法改变为等效成两排直线阵,这样可以在测量方位角的同时,利用信号到达两排直线阵的时间差实现仰角估计。由于DSP实现FFT具有较强优势,因此将方位角的计算和时延估计算法交给DSP来实现,通过测试证明该实验系统可以实现乌兰韦伯体制的二维测向,为下一步的单站定位奠定基础。
Through the study of the Ulan Weber direction finding system, the traditional method of finding the direction of a circular antenna array which is equivalent to a linear array is changed to be equivalent to two linear arrays, so that the azimuth angle can be measured at the same time. The time difference between the arrival of two rows of linear array to achieve elevation estimation. Because of the strong advantage of DSP in FFT, the calculation of azimuth and the algorithm of time delay estimation are given to DSP. The test proves that the experimental system can realize the two-dimensional direction finding of Ulan-Weber system and is the next single station Positioning to lay the foundation.