时差定位系统测试是系统性能评估的重要组成部分。为了测试时差定位系统复杂电磁信号环境适应性,可以采用半实物仿真测试模式构建多辐射源和多路径信号环境。利用多通道矢量信号源模拟产生某定位场景下各基站的接收信号,用于时差定位系统测试。文中介绍了利用R&S 公司的双通道SMW200A 和两个SGS100A 矢量信号发生器构建四站时差定位测试环境,用于测试四站时差定位系统的时差测量精度、时差定位精度、复杂电磁信号环境适应性等系统性能参数。

The TOA location system testing is the key component of system performance evaluation. In order to test the complicated electromagnetic signal environment adaptability of TOA location system, the semi-physical simulation scheme was used to build the testing multiple signal source and the multipath signal environment. The TOA location base station received signal of determinant location situation was built by the multichannel vector signal generators. In this paper, the four stations TOA location testing environment was built based on the double鄄channel vector signal generators R&S SMW200A and two vector signal generators R&S SGS100A, based on which the system performance parameters such as time difference testing accuracy, TOA location accuracy and complicated electromagnetic signal environment adaptability were tested.

TN957