基于CDMA容量的星载多波束天线赋形分析  

Analysis of Beam-forming Scheme Based on CDMA System Capacity

作　　者：徐非[1,2] 梁广[1,2] 姜兴龙[1,2] 龚文斌[1,2] 

机构地区：[1]中科院上海微系统与信息技术研究所,上海200050 [2]上海微小卫星工程中心,上海200050

出　　处：《遥测遥控》2011年第4期19-24,共6页Journal of Telemetry,Tracking and Command

基　　金：中科院创新基金项目(CXJJ_**_*107);上海市自然科学基金(09ZR1430400)

摘　　要：建立LEO-CDMA通信系统容量分析模型,给出系统容量的计算方法,从系统容量的角度出发对比分析运用遗传算法赋形得到的波束增益模型和基于二阶锥形模型的波束增益模型的系统容量。结果表明,基于二阶锥形增益模型的系统容量约为基于赋形增益模型系统容量的两倍。分析结果为多波束接收天线的系统设计及赋形方案设计提供了理论依据。Through the establishment of capacity analysis model of LEO-CDMA communication system,a method to calculate the system capacity is presented.Considering the two different gain models,one formed with genetic algorithm and another based on second-order cone gain model,a comparison of capacities between the two models is presented.The analysis shows that the capacity of system based on the second-order cone gain model is about twice of the capacity calculated by using the formed gain model.The conclusion of this paper can be used as a theoretical foundation in the design of multi-beam receiving antenna.

关 键 词：多波束赋形 星地通信 功率控制 系统容量 

分 类 号：TN929.533[电子电信—通信与信息系统]