基于时间调制技术的可重构后向散射通信系统
Reconfigurable Backscattering Communication System Based on Time Modulation Technique
倪刚 1陈瑞华 1贺冲 1金荣洪1
作者信息
- 1. 上海交通大学电子信息与电气工程学院 上海 200240
- 折叠
摘要
近年来,时间调制阵列因其优越的矢量调控性能受到广泛关注.基于时间调制方法,该文提出一种可重构后向散射通信系统.该系统中后向散射节点将多类数字调制符号映射至控制信号波形的谐波分量中,以该波形控制后向散射节点对基站端来波的散射与吸收态;接收机采样后向散射信号并提取控制信号波形后,通过傅里叶变换计算谐波分量并恢复后向散射节点发射的数字调制符号.仿真结果验证了几种谐波解调方法的性能及与理论值的一致性.基于幅度、相位键控及正交振幅调制的可重构后向散射传输实验验证了所提系统和方法的可行性.相比较而言,该后向散射通信系统具有功耗低、结构简单、多类数字调制方式可重构的特点.
Abstract
In recent years,time-modulated array has aroused much attention due to its superior performance on vector control.Based on the time modulation method,a type of reconfigurable backscattering communication system based on time modulation technique is proposed in this paper.In backscattering node of the proposed system,multiple digital modulation symbols are mapped into the harmonic component of the control waveforms.The scattering or absorbing states of the incoming wave from the base station are then controlled by the designed waveforms.After the receiver samples the backscattering signal and extracts the control waveforms,the digital modulation symbols transmitted from the backscattering node can be recovered from the harmonic component with the Fourier transform.Simulation results demonstrate the performance of the harmonic demodulation methods and consistency with the theoretical values.Meanwhile,the reconfigurable backscattering transmitting experiments based on amplitude,phase shift keying and quadrature amplitude modulation demonstrate the feasibility of the proposed system and methods.In comparison,the proposed system has the characteristics of low power consumption,simple structure and reconfigurable digital modulation.
关键词
时间调制/后向散射/可重构数字调制/谐波分量/傅里叶变换Key words
Time modulation/Backscattering/Reconfigurable digital modulation/Harmonic component/Fourier transform引用本文复制引用
基金项目
国家科技创新2030行动计划(2022ZD0208601)
出版年
2024
NETL
NSTL
万方数据