幅相不一致对沃森-瓦特测向的影响及解决方法  

Effects of amplitude and phase errors on Watson-Watt direction finder and the solution method

作　　者：杜政东[1,2] 魏平[1] 尹文禄[2] 张政[2] 孙亦平[2] 

机构地区：[1]电子科技大学,成都610054 [2]西南电子电信技术研究所,成都610041

出　　处：《电波科学学报》2015年第5期959-966,共8页Chinese Journal of Radio Science

摘　　要：针对沃森-瓦特测向处理中幅相不一致对定单向及测向准确度的影响问题,分析了定单向法则失效的原因,提出了针对参考通道输出信号的全相位校正方法.利用该方法获取的最优相位修正量对参考通道输出信号进行移相处理,使测向通道与参考通道输出信号之间的相位关系满足定单向法则的要求,提高了定单向方法的稳健性.通过对测向误差特性的分析,给出了因测向通道间幅相误差导致的测向误差表达式,提出了利用最小二乘法计算误差曲线的拟合参数,从而可实现利用有限区域内的测向误差测量数据对全方位测向误差的估计,提高测向的准确度.通过仿真验证了提出方法的有效性.For the effect of de-ambiguity and accuracy due on amplitude-phase errors in Watson-Watt direction finder,the invalidity reason of de-ambiguity rule is analyzed.A method called all phase calibration for the output of reference channel is proposed.By this method,optimal phase correction value is gained which is used to process phase shift for the output of reference channel.Thus,the phase relationship between the output of direction finding channels and reference channel meets the requirement of the rule of de-ambiguity.The robust of de-ambiguity is improved.Through the analysis of characteristics of direction finding errors,errors express for phase errors between direction finding channels is given.Then,the fitting coefficients of errors curve can be estimated by least square method.Omnibearing errors calibration can be realized by error measured data in a given area by this method and direction finding accuracy can be improved.Simulation results prove the validity of the proposed method.

关 键 词：沃森-瓦特 测向 象限模糊 误差 校正 

分 类 号：TN931.3[电子电信—信号与信息处理]