New Antenna Array Beamforming Techniques Based on Hybrid Convolution/Genetic Algorithm for 5G and Beyond Communications  

作　　者：Shimaa M.Amer Ashraf A.M.Khalaf Amr H.Hussein Salman A.Alqahtani Mostafa H.Dahshan Hossam M.Kassem 

机构地区：[1]Electronics and Communications Engineering Department,Higher Institute of Engineering and Technology,Kafr Elsheikh,Egypt [2]Electronics and Electrical Communications Engineering Department,Faculty of Engineering,Minia University,Minia,Egypt [3]Electronics and Electrical Communications Engineering Department,Faculty of Engineering,Tanta University,Tanta,Egypt [4]Electronics and Electrical Communications Engineering Department,Faculty of Engineering,Horus University Egypt,New Damietta,Egypt [5]Department of Computer Engineering,College of computer and Information Sciences,King Saud University,Riyadh,11543,Saudi Arabia [6]School of Computing,Mathematics and Engineering,Charles Sturt University,Bathurst,NSW,2795,Australia

出　　处：《Computer Modeling in Engineering & Sciences》2024年第3期2749-2767,共19页工程与科学中的计算机建模（英文）

基　　金：Research Supporting Project Number(RSPD2023R 585),King Saud University,Riyadh,Saudi Arabia.

摘　　要：Side lobe level reduction(SLL)of antenna arrays significantly enhances the signal-to-interference ratio and improves the quality of service(QOS)in recent and future wireless communication systems starting from 5G up to 7G.Furthermore,it improves the array gain and directivity,increasing the detection range and angular resolution of radar systems.This study proposes two highly efficient SLL reduction techniques.These techniques are based on the hybridization between either the single convolution or the double convolution algorithms and the genetic algorithm(GA)to develop the Conv/GA andDConv/GA,respectively.The convolution process determines the element’s excitations while the GA optimizes the element spacing.For M elements linear antenna array(LAA),the convolution of the excitation coefficients vector by itself provides a new vector of excitations of length N=(2M−1).This new vector is divided into three different sets of excitations including the odd excitations,even excitations,and middle excitations of lengths M,M−1,andM,respectively.When the same element spacing as the original LAA is used,it is noticed that the odd and even excitations provide a much lower SLL than that of the LAA but with amuch wider half-power beamwidth(HPBW).While the middle excitations give the same HPBWas the original LAA with a relatively higher SLL.Tomitigate the increased HPBWof the odd and even excitations,the element spacing is optimized using the GA.Thereby,the synthesized arrays have the same HPBW as the original LAA with a two-fold reduction in the SLL.Furthermore,for extreme SLL reduction,the DConv/GA is introduced.In this technique,the same procedure of the aforementioned Conv/GA technique is performed on the resultant even and odd excitation vectors.It provides a relatively wider HPBWthan the original LAA with about quad-fold reduction in the SLL.

关 键 词：Array synthesis convolution process genetic algorithm(GA) half power beamwidth(HPBW) linear antenna array(LAA) side lobe level(SLL) quality of service(QOS) 

分 类 号：TN82[电子电信—信息与通信工程]