天线振颤对GMR-1系统波束选择的影响分析及抑制  

Analysis and suppression of influence on spotbeam selection of GMR-1 system under antenna oscillation

作　　者：林晓旭[1] 刘乃金[2] 钱晋希 赵旦峰[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]中国空间技术研究院通信卫星事业部,北京100094

出　　处：《计算机应用》2014年第2期346-350,共5页journal of Computer Applications

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCF130802)

摘　　要：针对卫星天线振颤的现象,分析了天线振颤对地球同步轨道移动无线接口(GMR-1)系统波束选择性能的影响,并提出了一种抑制这种影响的改进型波束选择算法。改进算法根据移动地面站(MES)与其所在波束中的网关(GS)的距离动态设置滞后余量。利用OPNET软件搭建系统模型进行仿真验证,结果表明:天线振颤对不同地理位置的MES的波束选择过程有不同程度的影响;传统波束选择过程中,波束选择错误次数随滞后余量和天线最大振颤幅度的增加而增加;改进算法能够显著减少波束选择错误次数,有效抑制天线振颤对波束选择性能的影响。Considering the antenna oscillation phenomenon, the performance of spotbeam selection in Geostationary Earth Orbit Mobile Radio Interface （GMR-1） system under antenna oscillation was analyzed and an improved spotbeam selection algorithm was proposed. The improved algorithm could dynamically set hysteresis using the distance between the Mobile Earth Station （MES） and its Gateway Station （GS）. A simulation model was implemented using OPNET. The simulation results show that the MES at different location is influenced by antenna oscillation to different extent. Besides, the wrong times of spotbeam selection increases with the increase of hysteresis and the maximum amplitude in the traditional algorithm. Finally, the improved algorithm can reduce the wrong times of spotbeam selection and restrain the influence on spotbeam selection under antenna oscillation efficiently.

关 键 词：卫星通信 地球同步轨道移动无线接口 波束选择 滞后余量 OPNET 

分 类 号：TN927.23[电子电信—通信与信息系统]