多目标扩频角度跟踪系统及精度分析

Multiobject Spread Spectrum Angle Tracking System and Its Precision Analysis

扩频角度跟踪系统是实现扩频测控的前提,研究无数据包络情况下的直接扩频角度跟踪系统,在系统建模的基础上进行了数学建模、精度分析和数学仿真。结果表明:扩频角跟踪精度可达到单脉冲信标跟踪的精度;精度不仅受接收机输入端噪声的影响,还受数据自噪声的影响;高信噪比情况下,角误差通道的相移限制跟踪精度,但合理设置参数仍可实现多目标、高精度的扩频角度跟踪。

Spread spectrum angle tracking system is the precondition to implement the spread spectrum tracking,telemetry,and command.On the basis of the modelling of direct sequence spread spectrum angle traking system,we carry out mathematical modeling,precision analysis and simulation.The results indicate that spread spectrum angle tracking system may obtain the same precision as mono pulse beacon tracking system;both receiver noise and data noise all have influence on the precision of the system;and under circumstances of high S/N,the phase shift of angle error channel may restrict precision of the system,but a precise multi-object tracking can still be realized through reasonable setup of parameters.