基于类单边带时间调制阵列宽带通信的优化方法  

Optimization method of wideband communication based on single-sideband time-modulated array

作　　者：刘冬平 杨柳 夏雨 陈靖峰[1] 金荣洪[1] LIU Dongping;YANG Liu;XIA Yu;CHEN Jingfeng;JIN Ronghong(Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《电波科学学报》2022年第6期984-991,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(62001291);上海市“科技创新行动计划”高新技术领域项目(20511106600);上海交通大学−西安电子科技大学教育部重点实验室联合基金(LHJJ/2021-09)。

摘　　要：提出了一种基于类单边带时间调制阵列的宽带通信方法:通过优化调制时序,大幅度降低主波束范围内的多阶谐波信号的边带电平,从而有效降低谐波引入的带内混叠干扰,提高可用带宽.进一步地,以实际器件最短切换时长为基准,优化单位周期内调制时序最小占空比长度,提高系统实际可传输带宽.仿真和实验结果验证了该方法在宽带通信中的有效性,时间调制技术在宽带系统中的应用范围得以扩展.A wideband communication method based on single-sideband time-modulated array(TMA)is proposed in this paper.This method greatly reduces the sideband level of multi-order harmonic signals within the main beam range by optimizing modulation timing sequence,thus effectively reducing the interference of in-band aliasing introduced by harmonics,and improving available bandwidth.Furthermore,based on the actual shortest switching time of the device,the minimum duty cycle length of the modulation sequence within a unit cycle is optimized to effectively improve the actual transmission bandwidth of the system.The simulation and experiment results verify the effectiveness of the proposed method in wideband communication,and the application range of time modulation technology in wideband systems is improved.

关 键 词：时间调制阵列 谐波 时序优化 宽带通信 差分进化法 

分 类 号：TN821.8[电子电信—信息与通信工程]