研究了一种多路传输且频率可选的波分复用光纤无线系统。该系统可同时传输最多4路频率可选的下行毫米波信号和2~4路上行信号。经仿真实验，通过7×8数字光开关矩阵系统可产生6种倍频因子分别为2、4、6、8、10、12的毫米波信号，且多路不同频的下行毫米波信号在误码率为10-9情况下经50 km单模光纤传输的功率代价范围为1.21 dB~1.71 dB，同时多路上行信号功率代价为1.10 dB~1.24 dB,系统体现了良好的抗色散性和均衡性。

A frequency-selectable and multi-channel wavelength division multiplexing radio-over-fiber system is studied. The system is able to transmit at most 4-channel frequency-selectable downstream millimeter wave (MMW) signals and 2-channel to 4-channel upstream signals. Simulation results show that the proposed system can generate MMW signals with different frequency multiplication factors by 7×8 digital optic switch, such as 2, 4, 6, 8, 10 and 12. After 50 km standard single mode fiber transmission, the power penalty of the downstream MMW signals is from 1.21 dB to 1.71 dB under the bit error rate of 10-9, while the power penalty for upstream signals is from 1.10 dB to 1.24 dB. The proposed system is successfully verified with characteristics of equalization and dispersion mitigation.