数据采集与处理2026，Vol.41Issue(1)：272-286,15.DOI:10.16337/j.1004-9037.2026.01.019
UCCA-OAM通信系统中的双模块干扰消除方案
Dual-module Interference Cancellation Scheme for UCCA-OAM Communication System
摘要
Abstract
Orbital angular momentum(OAM)is a technique that provides additional degrees of freedom to improve the spectral efficiency of wireless communication.However,its application typically requires strict alignment between the transmitting and receiving antennas to maintain modal orthogonality.Considering that when using misaligned concentric circle UCA to generate and receive OAM beams,there is not only modal interference caused by misaligned single-ring UCA,but also array interference among different UCAs in the concentric circle,this paper combines the OAM multiplexing generated by uniform circular array(UCA)antennas with multiple-input multiple-output(MIMO)technology to form a uniform concentric circular array orbital angular momentum(UCCA-OAM)communication system.In order to further improve the performance of the OAM communication system,this paper proposes a uniform concentric circular array orbital angular momentum(UCCA-OAM)multiplexing transmission system in the case of unaligned.This system uses multiple concentric circles UCA as the transmitting and receiving ends,and at the same time takes advantage of the benefits of OAM multiplexing to achieve signal multiplexing through discrete Fourier transform processing.In the unaligned UCCA-OAM communication system,when transmitting OAM beams,there exists not only inter-modal interference of single-ring UCA,but also inter-array interference of multi-ring UCA.Based on this,this paper proposes a dual-module interference cancellation scheme to approximately eliminate modal interference and array interference.Firstly,the modal interference caused by the misalignment of single-ring UCA is approximately eliminated through the beam control scheme based on phase compensation.Then,according to the inverse operation of the four-block matrix,a progressive block matrix inverse operation is proposed to eliminate the array interference caused by multi-ring UCA,thereby completing the dual-module interference elimination scheme based on the progressive block matrix inverse operation.Experimental results demonstrate that the proposed dual-module interference cancellation scheme effectively suppresses both modal and array interference,thereby improving the communication performance of the UCCA-OAM system.关键词
轨道角动量/多输入多输出系统/模态干扰消除/阵列干扰消除/分块矩阵逆运算Key words
orbital angular momentum(OAM)/multiple-input multiple-output(MIMO)system/modal interference cancellation/array interference cancellation/block matrix inversion分类
信息技术与安全科学引用本文复制引用
李汀,沈铭宇,张春洁,解培中..UCCA-OAM通信系统中的双模块干扰消除方案[J].数据采集与处理,2026,41(1):272-286,15.基金项目
国家自然科学基金(62271265). National Natural Science Foundation of China(No.62271265). （62271265）
