同步轨道三星时差定位系统定位构型与精度研究

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中图分类号：TN971 文献标志码：A

Abstract： Synchronous orbit satelites have the characteristic of continuous wide area coverage. Three-satellite TDOA positioning is an important satellite based passive positioning system with good positioning performance and low hardware requirements，which can be mainly applied to high-precision positioning of ground communication interference sources. The positioning principle and method of the synchronous orbit three-satelite TDOA positioning system are studied in detail，and the expres sion of the system positioning accuracy（geometric precision factor，GDOP） is derived. Multiple positioning system track configurations are proposed，and the distribution and variation of positioning accuracy in the common view area under diferent configurations are analyzed through simulation. The comprehensive positioning performance under diferent configurations is analyzed and compared， which can provide a basis for optimizing the design of synchronous orbit three-satelite TDOA positioning system.

Key words：three-satelite TDOA positioning; synchronous orbit; positioning accuracy; position ing configuration

0 引言

随着现代社会通信需求的不断增加，对通信系统稳定性与可靠性的要求也在不断提高[1-3]在这样的背景下，卫星通信由于不受地理等因素的制约，很好地补充了地基通信手段覆盖率不足的短板[4-5]，为一些偏远或海上区域的通信保障提供了有利条件，因此已经成为现代通信系统的重要组成部分6]。（剩余7929字）