The merging of optical communication and wireless communication is a tendency in the development of future communication.Orthogonal Frequency Division Multiplexing (OFDM) technology is becoming a core technology in th...The merging of optical communication and wireless communication is a tendency in the development of future communication.Orthogonal Frequency Division Multiplexing (OFDM) technology is becoming a core technology in the physical layer of next generation wireless communication system.Taking advantages of both wireless communication and optical communication,OFDM Radio over Fiber (OFDM-RoF) system is characterized by high speed,large capacity and high spectral efficiency.However,it still has some problems to be addressed,including dispersion and nonlinearity effects.The nonlinearity effect of fiber and modulator can be mitigated by PAPR reduction algorithms,the dispersion effect can be eliminated using Cyclic Prefix (CP) and channel estimation,and the fiber nonlinearity can be reduced by techniques such as digital phase conjugation,Partial Carrier Filling (PCF),nonlinearity precompensation and serial correlation reduction.展开更多
光载无线通信(radio-over-fiber,RoF)技术是为适应高速大容量无线通信而发展起来的,是将光纤通信和无线通信结合起来的无线接入技术。在RoF中使用传统的无线调制技术会导致系统传输效率低,无法满足用户高速、宽带、高效的数据传输需求...光载无线通信(radio-over-fiber,RoF)技术是为适应高速大容量无线通信而发展起来的,是将光纤通信和无线通信结合起来的无线接入技术。在RoF中使用传统的无线调制技术会导致系统传输效率低,无法满足用户高速、宽带、高效的数据传输需求。把正交频分复用技术(Orthogonal Frequency Division Multiplexing,OFDM)应用于RoF系统,可以解决RoF系统传输效率低、数据速率低的缺陷,同时,还提高了系统的抗干扰能力。论文搭建了基于OFDM的RoF系统,并仿真验证了OFDM技术在RoF系统中的数据速率高、信道利用率高和抗干扰的特性,论证了将用户端光有线信号接入到OFDM方案的可行性,实现了有线、无线灵活接入用户的目标。展开更多
基金funded by the National Natural Science Foundation of China under Grant No.60877052by the National High Technology Research and Development Program of China("863" program)under Grant No.2009AA01Z220
文摘The merging of optical communication and wireless communication is a tendency in the development of future communication.Orthogonal Frequency Division Multiplexing (OFDM) technology is becoming a core technology in the physical layer of next generation wireless communication system.Taking advantages of both wireless communication and optical communication,OFDM Radio over Fiber (OFDM-RoF) system is characterized by high speed,large capacity and high spectral efficiency.However,it still has some problems to be addressed,including dispersion and nonlinearity effects.The nonlinearity effect of fiber and modulator can be mitigated by PAPR reduction algorithms,the dispersion effect can be eliminated using Cyclic Prefix (CP) and channel estimation,and the fiber nonlinearity can be reduced by techniques such as digital phase conjugation,Partial Carrier Filling (PCF),nonlinearity precompensation and serial correlation reduction.
文摘光载无线通信(radio-over-fiber,RoF)技术是为适应高速大容量无线通信而发展起来的,是将光纤通信和无线通信结合起来的无线接入技术。在RoF中使用传统的无线调制技术会导致系统传输效率低,无法满足用户高速、宽带、高效的数据传输需求。把正交频分复用技术(Orthogonal Frequency Division Multiplexing,OFDM)应用于RoF系统,可以解决RoF系统传输效率低、数据速率低的缺陷,同时,还提高了系统的抗干扰能力。论文搭建了基于OFDM的RoF系统,并仿真验证了OFDM技术在RoF系统中的数据速率高、信道利用率高和抗干扰的特性,论证了将用户端光有线信号接入到OFDM方案的可行性,实现了有线、无线灵活接入用户的目标。
