On the achievable DF accuracy of two kinds of active interferometers
On the achievable DF accuracy of two kinds of active interferometers
复制标题
两种有源干涉仪可达到的测向精度
DOI：
10.1109/7.532277
复制
发表时间：
1996
影响因子：
4.4
通讯作者：
L. Biały
中科院分区：
文献类型：
--
作者：
Hagit Messer;G. Singal;L. Biały
我们比较了两种有源干涉仪在最小配置下的测向性能：一个传统的干涉仪有一个发射器和两个接收器，另一个干涉仪有一个接收器和两个发射器，每个发射器辐射不同的信号。通过研究Cramer-Rao界（CRB）对一个沉默的，nonradiating目标的方位的估计误差，我们发现的条件下，可实现的DF性能的两个干涉仪是等效的。我们表明，在理想情况下，一个充分必要条件是，在后者的干涉仪中的两个传输信号是完全不相关的。在更现实的情况下，两个干涉仪的性能是不一样的，除非提出更严格的要求。仿真结果支持了理论分析结果。
We compare the performance of direction finding (DF) using two kinds of active interferometers in a minimal configuration: a conventional interferometer with one transmitter and two receivers, and an alternative interferometer of one receiver and two transmitters, each one of them radiates a different signal. By studying the Cramer-Rao bound (CRB) on the estimation error of the bearing of a silent, nonradiating target we find conditions under which the achievable DF performance of the two interferometers is equivalent. We show that under an ideal situation, a necessary and sufficient condition is that the two transmitted signals in the latter interferometer are perfectly uncorrelated. In more realistic scenarios the performance of the two interferometers is not the same unless more restrictive requirements are posed. The theoretical results are supported by simulation results.