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城市街道下场景IRS辅助D2D通信系统波束成形设计

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针对城市街道场景下蜂窝用户和D2D通信用户共享频谱以及城市街道下无线信道特性,该文提出一种IRS辅助的联合波束成形设计方法.在D2D链路信号与干扰加噪声比的约束下,以最大化蜂窝用户容量为目标,设计了最优的波束形成向量、相移矩阵和D2D链路发射功率.引入松弛变量将非凸且变量耦合的优化问题转换为解耦后的凸优化问题和二分法搜索功率分配,采用黎曼共轭梯度算法对反射相移矩阵进行优化.仿真结果表明,所提算法收敛性较好,且与基准方案相比能有效地提升用户信道容量.
Beamforming Design for IRS-assisted D2D Communication System Under Urban Street Scenarios
Considering the spectrum sharing between cellular users and D2D users,and the wireless channel characteristic of urban streets,an Intelligent Reflecting Surface(IRS)-assisted joint beamforming method is proposed.Under the constraints of signal to interference plus noise ratio for D2D link,the parameter including optimal beamforming vectors and phase-shift matrices and D2D transmitting powers are designed with the objective of maximizing cellular user capacity.The nonconvex coupling variable optimization problem is transformed into the convex decoupling variable optimization problem and binary search power allocation by introducing slack variables,and the reflection phase-shift matrices are also optimized with Riemann conjugate gradient algorithms.Simulation results show that the proposed algorithm has perfect convergence and higher user channel capacity comparing with the baseline schemes.

Intelligent Reflecting Surface(IRS)D2DBeamformingAlternating optimization

张祖凡、刘建、张晨璐

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重庆邮电大学通信与信息工程学院 重庆 400065

维沃移动通信有限公司 深圳 518049

智能反射面 D2D 波束成形 交替优化

2024

电子与信息学报
中国科学院电子学研究所 国家自然科学基金委员会信息科学部

电子与信息学报

CSTPCD北大核心
影响因子:1.302
ISSN:1009-5896
年,卷(期):2024.46(9)