一种基于二次外差法产生60GHz毫米波方案

60 GHz Millimeter Wave Production Scheme Based on Secondary Heterodyne Method

随着光载无线通信(ROF)的发展,为了得到60 GHz的毫米波信号,提出了一种改进的基于二次外差法八倍频产生毫米波的方案,给出了生成毫米波系统的完整模型,理论分析了系统的可行性及激光器线宽和光纤色散对系统性能的影响。通过Opti System软件,对系统进行仿真,调制解调出60 GHz毫米波,验证了方案的正确性。并仿真得到系统的眼图,得到了激光器线宽对系统误码率的影响曲线,证实了窄激光器线宽有利于降低系统的误码率。

With the development of radio-over-fiber （ROF）, for getting 60 GHz millimeter wave signal, an improved solution based on secondary heterodyne method to produce eight times frequency millimeter wave is pro- posed. And a complete model for producing a millimeter wave system is presented. The feasibility of the system is analyzed theoretically and the influence of the laser line width and optical fiber dispersion on the system performances is analyzed. The system is simulated through OptiSystem software, the 60 GHz millimeter wave is demodulated which verifies the correctness of the scheme. The eye diagram of the system and the influence curve of the laser line width on the system bit error rate are obtained, which verifies that the narrow laser line width is helpful to reduce the system bit error rate.