一种星载数模混合阵列结构及波束形成算法  

An Onboard Hybrid Digital-Analog Array Structure and Beamforming Algorithm

作　　者：胡迪轩 朱立东[1] 张勇[1] 谢文轩 金世超[2] 杨钰茜 费春娇 HU Dixuan;ZHU Lidong;ZHANG Yong;XIE Wenxuan;JIN Shichao;YANG Yuqian;FEI Chunjiao(National Key Laboratory of Wireless Communications of UESTC,Chengdu 611731,China;State Key Laboratory of Space-Ground Integrated Information Technology of Space Star Technology Co.,Ltd.,Beijing 100094,China)

机构地区：[1]电子科技大学通信抗干扰全国重点实验室,四川成都611731 [2]中国空间技术研究院天地一体化信息技术国家重点实验室,北京100094

出　　处：《移动通信》2024年第1期111-117,共7页Mobile Communications

基　　金：国家重点研发计划项目“Q/V频段宽带星载相控阵多波束天线技术”(2021YFB2900404);国家自然科学基金“卫星通信弹性抗干扰传输理论与方法研究”(62371098)。

摘　　要：6G星地融合网络对卫星通信系统提出了高速率低时延低能耗的要求,由于星地链路信道环境复杂多变且容易受到干扰,需要研究干扰场景下的低成本可实现阵列架构及算法。针对这一问题,设计了一种数模混合阵列结构,子阵采用50%稀疏馈电以及最小二乘波束形成算法,超阵采用最小二乘与线性约束最小方差波束形成算法,并理论分析了阵列结构的可行性,证明子阵的零点能够抑制超阵的栅瓣。仿真结果表明,该结构以更低的复杂度实现了大规模阵列的效果,波束方向图指向明确且零陷深度足够,对干扰的抑制明显,获得了接近理想阵列增益的BER性能。The 6G satellite-ground integrated network poses demands for high data rates,low latency,and low energy consumption in satellite communication systems.Due to the complex and variable channel environment of satellite-ground links and their susceptibility to interference,it is necessary to research cost-effective and feasible array architectures and algorithms under interference scenarios.To address this issue,a hybrid digital and analog array structure is designed.The sub-array uses a 50%sparse feed and a least squares beamforming algorithm,while the super-array employs a combination of least squares and linearly constrained minimum variance beamforming algorithms.The feasibility of the array structure is theoretically analyzed,demonstrating that the nulls of the sub-array can suppress the grating lobes of the super-array.Simulation results indicate that this structure achieves the effect of large-scale arrays with lower complexity.The beam pattern is well-defined with sufficient null depth,providing significant interference suppression and achieving near-ideal array gain in terms of BER performance.

关 键 词：星地融合 卫星通信 数模混合波束形成 干扰抑制 

分 类 号：TN927[电子电信—通信与信息系统]