随机馈相方案的仿真对比及阈值参数C的优化分析  

Simulation Comparison of Randomizing Phase Feeding Methods and Optimization Analysis of Threshold Value C

作　　者：陈枭煜 孙武 CHEN Xiaoyu;SUN Wu(Beijing Institute of Remote Sending Equipment,Beijing 100854,China)

机构地区：[1]北京遥感设备研究所,北京100854

出　　处：《载人航天》2018年第2期267-272,共6页Manned Spaceflight

摘　　要：为减小数字式移相器造成的量化相位误差,需要对每个天线通道的相位进行随机馈相处理。在相控阵雷达波控系统的随机馈相方案中对常见的二可能值法和零相位误差法进行了仿真,结合与天线理想方向图馈相的误差及多次计算得到的方差,得出二可能值法部分随机馈相方案误差较小、算法稳定,之后对部分随机馈相的关键阈值参数C的取值范围进行了讨论,得出不同波束指向下效果较好的阈值区间,最后通过遗传算法优化计算得到了副瓣电平最低时的最佳馈相编码方案。结果表明:在某个波束指向下,通过选取合适的部分随机馈相的阈值参数,能够在不影响天线指向方向的基础上降低副瓣电平;而当波束指向角越大时,阈值参数C的值越小。In order to reduce the quantization phase error caused by the digital phase shifter,it is necessary to perform random feed-phase processing for the phase in each antenna channel.In the random feed scheme of the phased array radar control system,the two-probable value method and the zero-phase error method were simulated.Based on the error of the phase-feed with the ideal an-tenna pattern and the variance obtained by multiple rounds of calculation,it was found that the error of the random feed scheme was small and the algorithm was stable with the two-probable value meth-od.After that,the range of the critical threshold parameter C for some of the random feed phases was discussed,and the better threshold interval under different beam directions was obtained.Final-ly,the algorithm was optimized and the optimal feed phase encoding scheme with the lowest sidelobe level was calculated.The results showed that the sidelobe level could be reduced without affecting the direction of the antenna by selecting the appropriate partial random feed-thresholding parameters under a certain beam direction.When the beam steering angle was larger,the value of the threshold parameter was smaller.

关 键 词：随机馈相 二可能值法 零相位误差法 遗传算法 

分 类 号：TN820.13[电子电信—信息与通信工程]