相控阵测控技术(四):相控阵测控中角误差对测速/测距误差的耦合效应

Phased Array TT&C Technology—Part4:Angle Error on Velocity Measurement/Ranging Error Coupling Effect in Phased Array TT&C

相控阵中,控制各阵元移相值实现角度跟踪的同时也会对合成载波的相位产生影响,而测控中的测速/测距又是通过测量该相位来实现的,这就使得角度跟踪对测速/测距精度产生了影响,这是相控阵应用于测控系统的主要技术问题。研究了这种效应及其产生的机理,分析了各种影响因素,阐述了它的物理意义,推导出了相应的公式,指出了它对测速/测距误差的影响。

Controlling the phase of each element in a phased array will affect the phase of the conflate carrier,however,velocity measurement/ranging is achieved by measuring this phase,so the accuracy of velocity measurement/ranging will be affected during angle tracking,which is the main technical problem of phased array application in TT&C systems.The authors study this effect and its generation mechanism,analyze various Impact factors,elabrate its physical meaning,derive corresponding formulas,and point out its impact on velocity/range measurement errors.