提出了一种在正交频分复用-光载无线(OFDM-RoF)接收系统中符号定时同步算法的设计方案,阐述了该算法在现场可编程门阵列(FPGA)上的实现过程,分析了该设计方案的优势。设计完成后,运用Modelsim SE 10.1c对该算法进行仿真测试并对实验结...提出了一种在正交频分复用-光载无线(OFDM-RoF)接收系统中符号定时同步算法的设计方案,阐述了该算法在现场可编程门阵列(FPGA)上的实现过程,分析了该设计方案的优势。设计完成后,运用Modelsim SE 10.1c对该算法进行仿真测试并对实验结果进行分析。展开更多
文章采用由分步傅里叶变换求解薛定谔方程的方法研究了一套应用于基于正交频分复用(Orthogonal Frequency-Divi-sion Multiplexing,OFDM)技术的光纤无线通信(Radio over Fiber,ROF)传输系统模型,对其光学传输性能进行了仿真模拟计算。...文章采用由分步傅里叶变换求解薛定谔方程的方法研究了一套应用于基于正交频分复用(Orthogonal Frequency-Divi-sion Multiplexing,OFDM)技术的光纤无线通信(Radio over Fiber,ROF)传输系统模型,对其光学传输性能进行了仿真模拟计算。分析了光纤信道中色散和非线性参数对信号传输质量的影响,指出只有进行脉冲压缩才能在光纤中传输OFDM-ROF信号。展开更多
正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)与光载无线电ROF(Radio Over Fiber)技术结合为实现低成本、高速数据传输的无线网络提供了可能。但RoF链路的非线性降低了系统性能。文中在分析Mach-Zehnder调制器的静态...正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)与光载无线电ROF(Radio Over Fiber)技术结合为实现低成本、高速数据传输的无线网络提供了可能。但RoF链路的非线性降低了系统性能。文中在分析Mach-Zehnder调制器的静态模型基础上,提出用Volterra级数与冲击响应分析模型相结合模型化RoF非线性系统。在此模型基础上分析Mach-Zehnder调制器以及射频放大器非线性对OFDM信号的影响。仿真分析显示非线性会使OFDM信号频谱展宽,降低信号幅度,并且随着光调制指数的增加误差矢量,带外干扰增加。为OFDM-RoF系统的线性化处理以及系统光调制器调制指数的选择提供了理论依据。展开更多
The combination of radio over fiber (RoF) and orthogonal frequency division multiplexing (OFDM) techniques has resulted in a high-data-rate at lower cost in the last mile of wireless networks. This paper investigates ...The combination of radio over fiber (RoF) and orthogonal frequency division multiplexing (OFDM) techniques has resulted in a high-data-rate at lower cost in the last mile of wireless networks. This paper investigates the use of the OFDM as a modulation technique for radio over fiber (RoF) in passive optical network (PON). A laser source of 1550 nm wavelength was used with 100 km, 140 km and 288 km single mode fiber. In the OFDM-PON a passive optical splitter of ratio 1:2 is used to connect two optical network units (ONUs). A 10 Gbits/sec transmission bit rate is used to simulate the RoF-OFDM-PON system. The proposed system can provide a flexible, cost effective and significant high data rate.展开更多
文摘文章采用由分步傅里叶变换求解薛定谔方程的方法研究了一套应用于基于正交频分复用(Orthogonal Frequency-Divi-sion Multiplexing,OFDM)技术的光纤无线通信(Radio over Fiber,ROF)传输系统模型,对其光学传输性能进行了仿真模拟计算。分析了光纤信道中色散和非线性参数对信号传输质量的影响,指出只有进行脉冲压缩才能在光纤中传输OFDM-ROF信号。
文摘正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)与光载无线电ROF(Radio Over Fiber)技术结合为实现低成本、高速数据传输的无线网络提供了可能。但RoF链路的非线性降低了系统性能。文中在分析Mach-Zehnder调制器的静态模型基础上,提出用Volterra级数与冲击响应分析模型相结合模型化RoF非线性系统。在此模型基础上分析Mach-Zehnder调制器以及射频放大器非线性对OFDM信号的影响。仿真分析显示非线性会使OFDM信号频谱展宽,降低信号幅度,并且随着光调制指数的增加误差矢量,带外干扰增加。为OFDM-RoF系统的线性化处理以及系统光调制器调制指数的选择提供了理论依据。
文摘The combination of radio over fiber (RoF) and orthogonal frequency division multiplexing (OFDM) techniques has resulted in a high-data-rate at lower cost in the last mile of wireless networks. This paper investigates the use of the OFDM as a modulation technique for radio over fiber (RoF) in passive optical network (PON). A laser source of 1550 nm wavelength was used with 100 km, 140 km and 288 km single mode fiber. In the OFDM-PON a passive optical splitter of ratio 1:2 is used to connect two optical network units (ONUs). A 10 Gbits/sec transmission bit rate is used to simulate the RoF-OFDM-PON system. The proposed system can provide a flexible, cost effective and significant high data rate.
