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| 5G通信自适应空频盲波束成形抗干扰算法 |
| 高柳明,周立福,崔志文,穆鹏程,贾彦根,伍国兴,杨振宝,谷斌 |
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| (1.中国南方电网责任有限公司深圳供电局有限公司，广东 深圳 518000;2.西安交通大学 信息与通信工程学院，西安 710049) |
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| 摘要: |
| 为对抗5G通信环境中的宽带强干扰，针对下行恒模信号的接收，设计了一种基于多天线阵列的自适应空频盲波束成形抗干扰方法。采用空频复合域抗干扰模型，将信号在频域划分多个子带，每个子带内进行空域盲波束成形抗干扰，并共用一组抗干扰权系数。子带内信号首先进行白化预处理，将信干比与信噪比降至0 dB左右，然后基于信号的恒模特性，利用最小二乘恒模算法(Least Squares Constant Modulus Algorithm,LSCMA)迭代求解空域抗干扰权系数矢量。仿真实验表明，所设计算法能够兼顾对抗强干扰与弱干扰，能够抵抗最高25 dB的干扰，相较于传统LSCMA算法仅能抵抗0 dB左右干扰，抗干扰性能有明显提升。 |
| 关键词: 5G通信 空频自适应处理 盲波束成形 恒模信号 抗干扰 |
| DOI：10.20079/j.issn.1001-893x.240312003 |
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| 基金项目: |
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| An Adaptive Space-Frequency Blind Beamforming Algorithm for 5G Communication |
| GAO Liuming,ZHOU Lifu,CUI Zhiwen,MU Pengcheng,JIA Yangen,WU Guoxing,YANG Zhenbao,GU Bin |
| (1.Shenzhen Power Supply Bureau,China Southern Power Grid,Shenzhen 518000,China;2.School of Information and Communication Engineering,Xi’an Jiaotong University,Xi’an 710049,China) |
| Abstract: |
| In order to combat broadband strong interference in 5G communication environment,an adaptive space-frequency blind beamforming method based on multi-antenna array is designed for downlink constant mode signal reception.The signal is divided into multiple subbands in the frequency domain by using the space-frequency complex domain anti-jamming model,and the spatial blind beamforming anti-jamming is performed in each subband,and a set of anti-jamming weight coefficients are shared.The signal in subband is first whitenized and the signal-to-interference ratio and signal-to-noise ratio are reduced to about 0 dB.Then,according to the constant model property of the signal,the least squares constant modulus algorithm(LSCMA) is used to iteratively solve the spatial interference weight vector.Simulation experiments show that the proposed algorithm can resist both strong and weak interference,and can resist up to 25 dB interference.Compared with that of the traditional LSCMA which can only resist about 0 dB interference,the anti-interference performance is significantly improved. |
| Key words: 5G communication space-frequency adaptive processing blind beamforming constant mode signal anti-interference |
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