| 摘要: |
| 为了解决采用On-Off Keying(OOK)调制的环境反向散射通信(Ambient Backscatter Communication,AmBC)系统中接收机接收来自信号源的射频信号对电子标签反射射频信号的干扰，提出了一种基于OOK调制的环境反向散射通信优化系统。优化方案包含接收机正反向检测和电子标签π/2相位偏移重发两个部分。接收机增加正反向检测方案解决接收数据与电子标签传输数据反向问题，电子标签增加π/2相位偏移重发方案解决接收机接收数据中0和1的采样数据无法分辨。MATLAB仿真结果表明，当信噪比为23 dB和载干比为0.1时，在相位差θ∈{0，2π珆的区域内，优化系统最大误码率大于1%的相位差范围由1.26π减小为0，有效解决了来自信号源的射频信号对电子标签反射信号的干扰，提升了环境反向散射通信系统的实用性。 |
| 关键词: 物联网（ToT） 环境反向散射通信（AmBC） 相位偏移 正反向检测 OOK调制 |
| DOI：10.20079/j.issn.1001-893x.240605005 |
|
| 基金项目: |
|
| An Ambient Backscatter Communication Optimization System Based on OOK Modulation |
| WANG Wenbin,CHENG Qingfen,LI Xingwang |
| (1.Hebi Science and Technology Research InstituteHebi Branch of Henan Academy of Sciences,Hebi 458000,China;2.Department of Information Engineering,Jiaozuo Technician College,Jiaozuo 454003,China;3.School of Physics and Electronic Information,Henan Polytechnic University,Jiaozuo 454003,China) |
| Abstract: |
| In order to solve the interference of the receiver receiving the radio frequency(RF) signal from the signal source to the reflected RF signal from the electronic tag in the ambient backscatter communication(AmBC) system using on-off keying(OOK) modulation,an AmBC optimization system based on OOK modulation is proposed.The optimization scheme includes two parts:forward and reverse detection of receiver and the electronic tag of the phase offset π/2 retransmission. In the receiver,a forward and reverse detection scheme is added to solve the problem of reverse data between the received data and the reflected data of the electronic tag. In the electronic tag,the phase offset π/2 retransmission scheme is added to the electronic tag to solve the problem that the sampling data of 0 and 1 can’t be distinguished. Simulation by MATLAB shows rhat when the signal-to-noise ratio is 23 dB,and the carrier-to-interference ratio is 0.1,the phase difference range of the optimized system with a maximum bit-error-rate greater than 1% is reduced from 1.26π to 0 in the region of phase difference θ∈{0，2π珆. It effectively solves the interference of the RF signal from the signal source to the reflected signal from the electronic tag,and improves the practicability of the AmBC system. |
| Key words: Internet of Things(IoT) ambient backscatter communication（AmBC） phase offset forward and reverse detection OOK modulation |
《电讯技术》编辑部 