基于柔性天线阵列的通信感知一体化系统性能优化  

Performance Optimization of Integrated Sensing Communication Systems Based on Flexible Antenna Arrays

作　　者：吴磊 胡浪涛 谭镇坤 荆兆辰 杨一昊 WU Lei;HU Langtao;TAN Zhenkun;JING Zhaochen;YANG Yihao(School of Electronic Engineering and Intelligent Manufacturing,Anqing Normal University,Anqing 236133,China)

机构地区：[1]安庆师范大学电子工程与智能制造学院,安徽安庆246133

出　　处：《无线电工程》2025年第4期800-807,共8页Radio Engineering

摘　　要：柔性天线阵列(Flexible Antenna Arrays,FAA)具有可旋转、可弯曲和可折叠的特点,广泛应用于柔性无线电系统,以实现定制化的辐射模式。旨在说明能够动态调整表面形状的FAA可提升全向和定向天线模式的通信性能,并优化信道角度的克拉美罗界限(Cramér-Rao Bound,CRB)。为此,提出一个数学模型,分析了天线位置和方向的变化对阵列从平面状态转变为旋转状态的影响,提出了一种功率约束下联合优化通信波束赋形器和雷达信号协方差矩阵的算法。该算法旨在最小化信道角度估计的CRB,同时确保通信用户满足预定义的速率要求。仿真结果表明,在低发射功率下,定向模式相较于均匀线性阵列的性能提升最大,约为40%;在高功率下,定向模式和全向模式的性能提升分别为23%和15%。Flexible Antenna Arrays(FAA) exhibit characteristics such as rotatability,bendability,and foldability,making them widely applied in flexible radio systems to achieve customized radiation patterns.It is illustrated that FAA with dynamically adjustable surface configurations can improve the communication performance of omnidirectional and directional antenna patterns as well as the Cramér-Rao Bound(CRB) of the channel angle.To this end,a mathematical model is proposed to analyze the impact of changes in antenna positions and orientations on the transition of the array from a planar to a rotational state.Furthermore,an algorithm is developed to jointly optimize the communication beamformer and the radar signal covariance matrix under power constraints.The objective of this algorithm is to minimize the CRB of channel angle estimation while ensuring that communication users meet predefined rate requirements.Simulation results indicate that,at low transmission power,the directional mode achieves the most significant performance improvement compared to a uniform linear array,with an enhancement of approximately 40%.Under high power conditions,the performance improvements of the directional and omnidirectional modes are 23% and 15%,respectively.

关 键 词：通信感知一体化 柔性天线阵列 波束赋形设计 

分 类 号：TN928.5[电子电信—通信与信息系统]