基于MIMO阵列的综合射频系统鲁棒波形设计算法研究  

Robust Waveform Design Based on MIMO Multi-Function Radio Frequency Systems under Angle Uncertainties

作　　者：唐波[1] 吴文俊 史英春 王旭阳 李达 TANG Bo;WU Wenjun;SHI Yingchun;WANG Xuyang;LI Da(College of Electronic Engineering,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院,合肥230037

出　　处：《电子与信息学报》2023年第11期3918-3926,共9页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(62171450,61671453);安徽省杰出青年科学基金(2108085J30)。

摘　　要：基于多输入多输出(MIMO)阵列的综合射频(MFRF)系统通过优化多波形,可以在不同角度辐射不同的信号,进而同时实现多种功能。然而,当存在角度误差时,综合射频系统所合成的信号会出现畸变,这将导致系统性能下降。该文主要考虑存在角度误差时,对综合射频系统鲁棒波形设计算法进行研究。首先,提出基于最小最大化(Min-Max)框架的MIMO阵列多波形优化问题。同时,为减少非线性功放引起的波形失真,对发射波形施加了峰均比(PAPR)约束。为求解此问题,该文提出了基于交替方向乘子法(ADMM)和Majorization-Minimization(MM)方法的波形优化算法。仿真实验结果表明,当存在角度误差时,所提算法能够获得更好的性能。Multi-Function Radio Frequency(MFRF)systems based on Multiple-Input-Multiple-Output(MIMO)array can synthesize different signals that can realize multiple functions at different angles via waveform optimization.However,due to the angle uncertainties,the waveforms synthesized by MFRF systems might be distorted and the performance of the systems might degrade as well.The robust waveform design algorithm for MFRF systems under angle uncertainties is studied in this paper.Firstly,a waveform optimization based on Min-Max framework is proposed.Additionally,the Peak-to-Average-Power-Ratio(PAPR)constraint is enforced to reduce the waveform distortion caused by nonlinearity of the power amplifiers.To tackle this problem,an algorithm based on the Alternating Direction Method of Multipliers(ADMM)and Majorization-Minimization(MM)algorithm is derived.Simulation results show that the proposed algorithm can produce signals with different functions in different regions even with angle uncertainties.

关 键 词：综合射频系统 MIMO阵列 鲁棒波形设计 交替方向乘子法 

分 类 号：TN959.1[电子电信—信号与信息处理]