天地一体波束形成关键算法研究

项目名称： 天地一体波束形成关键算法研究

项目编号： No.61201241

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 邵尉

作者单位： 中国人民解放军理工大学

项目金额： 24万元

中文摘要： 在星地混合移动通信系统中，为降低因星载阵元数量大而导致的卫星功耗、质量、造价和信号处理负担加重，有必要研究天地一体波束形成技术，将全部或部分波束形成任务转至地面信关站完成，同时提高系统的抗上行干扰和防下行截获性能。该技术体系包括地基波束形成和天基-地基混合波束形成两种实现架构，本项目拟针对其中的关键算法开展研究，内容包括：面向天基-地基混合上行波束形成，研究星上降维方法和酉波束空间波束形成算法；为适应馈电链路有限传输带宽，研究码分复用和小波包分复用方法；针对动态传输场景，推导新型类LMS快速上行波束形成算法；设计引入各种误差效应的代价函数，研究基于支持向量机的稳健上行波束形成算法；面向地基下行波束形成，在防截获条件下构建功率控制与波束形成联合优化模型，并依据上行和下行对偶原理推导迭代求解算法。通过研究，力求促进天地一体波束形成技术体系的完善，为我国在该领域的建设事业提供技术支撑。

中文关键词： 天地一体波束形成；星上降维；馈电链路传输多路复用；抗干扰上行波束形成；防截获下行波束形成

英文摘要： In hybrid terrestrial-satellite mobile communication system, in order to decrease the heavy burden of power consumption, weight, cost and signal processing due to the great number of array elements on-board, it's necessary to study space-ground integrated beamforming technology and transfer all or part of beamforming tasks from satellite to gateway on earch. Moreover, the anti-jamming and anti-interception performances are also improved. Two realization structures, the ground-based beamforming (GBBF) and the hybrid on-space/on-ground beamforming (HSGBF), are involved in the space-ground integrated beamforming technology architecture. In this project, some key algorithms will be studied as follows. Firstly, for the uplink HSGBF, a feeder signal dimension reduction method and an unitary beamspace beamforming algorithm will be studied. Secondly, for the efficient utilization of limited transformation band width of feeder link, a code division multiplex method and a wavelet packet division multiplex method will be studied. Thirdly, for the dynamic transformation scenario, a new fast uplink LMS-like beamfroming algorithm will be derived. Fourthly, a cost function with several introduced error effects will be designed and a robust uplink ground-based beamforming algorithm based on Support Vector Machine (SVM) will b

英文关键词： the space-ground integrated beamforming；dimension reduction on-board；feeder link transformation multiplexing；anti-jamming uplink beamforming；anti-interception downlink beamforming