极化对消算法的进一步研究  

Intensive Analysis on Polarization Cancellation

作　　者：朱胜利 ZHU Sheng-li(No.10 Institute of CETC,Chengdu Sichuan 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036

出　　处：《通信技术》2020年第12期2908-2914,共7页Communications Technology

摘　　要：针对基于相关函数的极化对消算法在实际工程应用中遇到的问题,对比了该方法在中频和基带实施时的性能,分析了性能存在差异的原因。研究了噪声对消算法性能的影响,给出了存在噪声时,性能损失的具体计算方法。仿真实验结果表明,基于相关函数的极化对消算法在基带实施时更具优势,包括不易受相偏及时延的影响,对隔离度的估计更加准确等。另外,仿真实验结果还说明了当噪声不同源时,该方法的对消性能存在一定的损失,损失多少和隔离度及调制方式等有关。Aiming at the problems encountered in the practical engineering applications of the correlation function-based cross-polar interference canceller,firstly,the algorithm performance is analyzed in the existence of time delay and frequency difference from both baseband and intermediate frequency points of view,then the influence of noise on the method is explored from the perspective of theory and simulation experiments.Simulation results show that the correlation function-based canceller has more advantages in baseband,including less susceptibility to frequency difference and time delay and more accurate degree of isolation,and also show that there will be a certain loss in the performance due to the existence of noise from different sources.

关 键 词：极化隔离度 干扰对消 相关函数 性能损失 

分 类 号：TN911.4[电子电信—通信与信息系统]