Optimization Design and Application of Positioning Search Technology Based on Satellite Navigation System

Abstract

In order to realize the target positioning and search without mobile network in aviation, aerospace and other fields, a highly reliable wireless positioning and search system is proposed in this paper. The system includes positioning device and ground search device, avoids the risk of single point failure of communication by means of BeiDou Navigation Satellite System (BDS) / Global Positioning System (GPS) dual-mode Satellite positioning communication, proposes an innovative design of positioning device combined with microwave network, which expands a single group of antennas into an array antenna system, and improves the antenna transmission direction dimension to 360°at the expense of controllable signal transmission power. The system transmits target location information and equipment status through BDS short message service, and adopts time-sharing multiplexing and redundant framing technology to improve the comprehensive positioning frequency, which is more than 5 times of the original mode. In the actual test application, the average acquisition frequency of short message positioning information is less than 6s, and the measured average positioning error is about 5m.