摘要
在基于TDOA(到达时间差)的定位算法中,Chan方法由于其独特的优势得到广泛应用,但如何估计Chan定位算法所需的时延估计精度暂时没有明确的函数表达式。针对Chan定位算法,推导了该算法定位估计误差与定位参数(TDOA)估计精度之间的函数关系。给出了推导的具体步骤和函数关系的表达式,分析了该表达式所具有的物理意义。在移动台无线定位系统的设计过程中,根据所需的定位精度,通过该表达式可以直接计算出系统所必须的最小时延估计精度。
Chan method,for its unique advantages,is widely applied in TDOA （Time Difference of Arrival） positioning algorithm.However,there is now no explicit function expression on how to estimate the time-delay estimation accuracy required by Chan location algorithm.In this paper,the relation function between estimation errors of Chan location algorithm and the estimation accuracy of location parameter （TDOA） is deduced.The detailed deduction and the expression of the relation function are given and the physical meanings of the relation function also analyzed.In the design of MS （Mobile Station） radio location system,the least time delay estimation accuracy could be directly computed by this relation function according to the location accuracy required by the location system.
出处
《通信技术》
2010年第3期134-136,共3页
Communications Technology
