光纤无线电系统中的新型探测法研究

摘要

Radio over fiber systems,in which millimeter-wave signals on optical carriers are up-and down-linked between central stations and base antenna stations,are expected to support high-capacity wireless access networks in the future.Two beams of phase approximately equal coherent light are reflected from the tunable laser by the fiber Bragg grating,the millimeter wave signal is produced by photoelectric detector with the principle of balanced detection and the effect made by the phase noise and intensity noise are reduced.%光纤无线电系统利用光载波携带毫米波信号在中心站和基站之间构成上行和下行传输链路,能够满足宽带无线接入系统的需求.利用光外差的方法产生毫米波信号是光载毫米波最简单和直接的方式.分析了在光纤无线电系统中利用光纤布拉格光栅从可调谐激光器中反射出两束相位近似相等的相干光,采用平衡探测产生了毫米波信号,降低了相位噪声和强度噪声对产生的毫米波信号的影响.