太赫兹波通信系统中调制技术的研究

Research on Modulation Techniques of Terahertz Communication

分析了近年来可用于太赫兹通信的调制技术,从内调制、外调制以及电混频、光调制方式等角度研究了各种调制方式的发展情况、技术特点以及研究前景.研究发现,受技术发展水平的限制,目前,采用太赫兹辐射源直接调制与外加调制器的调制方式普遍存在带宽不足的缺点.而太赫兹波段作为载波而言,10Gbps以上的调制速率才真正能够发挥太赫兹通信的宽带优势,具有实际应用价值和研究意义.采用电混频与光调制方式的太赫兹通信技术由于采用了微波通信与光通信的技术优势,目前在调制速率方面远远超过了前两种调制方式.

This paper analyzes the modulation techniques of terahertz communication in recent years,introduces their development,technical characteristics and prospects intra-modulation,external modulation,electric mixing and optical modulation. Study found that there are widespread shortcomings in bandwidth by using Terahertz radiation sources directly modulated and external modulation due to restriction of technological development level. However, as carrier,THz wave working wave really play to its bandwidth advantages and has practical application value and research significance only if modulation rate more than 10Gbps. At present electric mixer and optical modulation in THz communication modulation is far more than the first two modulation methods because of using the advantages of microwave communication and optical communication technology.