基于混频偏置合成的高速太赫兹无线通信系统

A high speed terahertz wireless communication system based on mixer and bias power combination

提出一种基于载波抑制混频与载波偏置功率合成的高速太赫兹无线通信方案。发射端利用载波抑制混频器和载波偏置功率合成在140 GHz载波上实现了开关键控(OOK)调制;接收端利用包络检波接收器进行检波接收。分别开展了不同混频本振功率及偏置功率下的检波响应实验、不同基带信号功率及偏置功率下的检波响应实验,以及不同输入功率下的检波响应实验。实验结果对OOK调制器设计,以及OOK类通信系统的优化均具有较好的指导意义。最后,利用优化的系统参数在70 cm距离上实现了140 GHz,16 Gbps的无线通信,系统误码率(BER)优于10^(-5)。

A high speed terahertz wireless communication system based on the combination of carrier suppressive mixer and bias power of the carrier is proposed. In the transmitter, the On-Off Keying(OOK)modulation at 140 GHz is utilized by the combination of carrier suppressive sub-harmonic mixer and bias power of the carrier. An envelope detector is used to detect the signal in the receiver. The detector response experiments under three conditions, which are different local oscillator power and bias power, different base band signal power and bias power, different input signal power, are all carried out. Experiment results will have a guiding significance on the design of OOK modulator, and the optimization of the OOK based communication system. Finally, with the optimized system parameters, the 140 GHz wireless link succeeds in data transmission of 16 Gbps data over 70 cm with Bit Error Rate(BER) less than 10-5.