针对低压电力线的噪声影响数据通信的问题,在分析了低压电力线的噪声特性和频谱特征的基础上,提出采用240 k Hz为载波中心频率,传输速率9600 bps的BFSK调制方式,给出了BFSK解调算法,分析了BFSK接收性能。仿真和实测结果表明,在信噪比-10...针对低压电力线的噪声影响数据通信的问题,在分析了低压电力线的噪声特性和频谱特征的基础上,提出采用240 k Hz为载波中心频率,传输速率9600 bps的BFSK调制方式,给出了BFSK解调算法,分析了BFSK接收性能。仿真和实测结果表明,在信噪比-10 d B时,设计的BFSK调制解调器的误码率约为0.3%。展开更多
A novel method to generate binary frequency shift-keying(BFSK) radio frequency(RF) signals in optical domain is proposed.In the proposed system,an optical short pulse train is converted into super-Gaussian RF pulses w...A novel method to generate binary frequency shift-keying(BFSK) radio frequency(RF) signals in optical domain is proposed.In the proposed system,an optical short pulse train is converted into super-Gaussian RF pulses with high frequency based on optical pulse shaping by two Mach-Zehnder fiber interferometers(MZIs).And the generated RF signals are coded using a fast electro-optic switch.By properly designing the MZIs,BFSK RF signals with desired code pattern and modulation index can be generated.A theoretical model for describing the system is developed,and the generation of BFSK RF signals in millimeter-wave regime is demonstrated via simulations.展开更多
文摘针对低压电力线的噪声影响数据通信的问题,在分析了低压电力线的噪声特性和频谱特征的基础上,提出采用240 k Hz为载波中心频率,传输速率9600 bps的BFSK调制方式,给出了BFSK解调算法,分析了BFSK接收性能。仿真和实测结果表明,在信噪比-10 d B时,设计的BFSK调制解调器的误码率约为0.3%。
基金supported by the National Natural Science Foundation of China (No. 61032005)the Postdoctoral Science Foundation under Grant of China (No.2012M510442)
文摘A novel method to generate binary frequency shift-keying(BFSK) radio frequency(RF) signals in optical domain is proposed.In the proposed system,an optical short pulse train is converted into super-Gaussian RF pulses with high frequency based on optical pulse shaping by two Mach-Zehnder fiber interferometers(MZIs).And the generated RF signals are coded using a fast electro-optic switch.By properly designing the MZIs,BFSK RF signals with desired code pattern and modulation index can be generated.A theoretical model for describing the system is developed,and the generation of BFSK RF signals in millimeter-wave regime is demonstrated via simulations.
