1.6 - Research on the Realization of Passive TDOA in PCM/FM System
- etc2016 - 36. European Telemetry and Test Conference
2016-05-10 - 2016-05-12
- 1. Positioning & Timing
- T. Dai, N. Xie, L. Feng, Y. Wang - Institute of Electronic Engineering, China Academy Engineering Physics, Mianyang (China)
- 47 - 50
A kind of PCM/FM telemetry system which can realize the passive time difference of arrival (TDOA) position is introduced in this paper. The positioning principle is hyperbolic algorithm based on least squares method, and the method of system time-measurement is a timing synchronization algorithm based on data transformation tracking loop (DTTL). In this paper, the structure and hardware implementation platform of the positioning system are introduced, and the random error of the system is analyzed. In order to improve the positioning accuracy, the pre filtering method is adopted to reduce the random error caused by noise. The test results show that the positioning error is 18 meter when the SNR is 8.5dB and the source rate is 2Mbps. Therefore, this system can realize the precise positioning of the target signal in PCM/FM system.