D波段超外差高速无线通信系统

D-band superheterodyne high-speed wireless communication system

摘要:

太赫兹通信是6G时代无线移动通信重要发展方向之一，具有大带宽、低延时的特点，适用于高速无线回传、卫星通信等多种应用场景。本文设计了一款基于中频频率合成的D波段(110~170 GHz)无线通信系统，通过合成n路带宽为2 GHz的中频频率，实现总带宽为(n×2) GHz的D波段宽带无线通信，从而实现超过100 Gbps的传输速率。为验证系统可行性，对所设计的n路通信系统进行了1/n缩比验证，结果表明，利用2 GHz的D波段信道带宽，可实现最高128正交幅度调制(QAM)下11.2 Gbps的空口传输速率以及9.4 Gbps业务传输速率，证明了仅使用一套D波段射频前端的n路中频频率合成系统架构能够低成本地实现D波段宽带高速无线通信。

Abstract:

Terahertz communication is one of the important development directions for wireless mobile communication in the 6G era, characterized by large bandwidth and low latency, suitable for various application scenarios such as high-speed wireless backhaul and satellite communication. This paper designs a D-band (110~170 GHz) wireless communication system based on intermediate frequency synthesis, achieving D-band broadband wireless communication with a total bandwidth of (n×2) GHz by synthesizing n intermediate frequencies with a bandwidth of 2 GHz each, thereby achieving a transmission rate of over 100 Gbps. To verify the feasibility of the system, a 1/n scale-down verification was conducted on the designed n-path communication system. The results show that using a 2 GHz D-band channel bandwidth, a maximum of 11.2 Gbps air interface transmission rate and 9.4 Gbps service transmission rate can be achieved with 128-QAM(Quadrature Amplitude Modulation), proving that the n-path intermediate frequency synthesis system architecture using only one set of D-band RF front ends can achieve low-cost D-band broadband high-speed wireless communication.