论文部分内容阅读
随着高速数据通信业务需求的不断增长,未来通信将逐渐走向高频化、宽带化。正交频分复用OFDM技术作为第四代移动通信系统中的关键技术之一,能够极大改善无线通信的频谱效率,克服码间干扰。光纤无线传输ROF系统充分结合了光纤和高频无线电波传输的特点,能实现大容量、低成本的无线信号的有线传输和宽带无线接入。两者的结合成为近年来光通信研究的热点。本文主要介绍了OFDM-ROF系统模型,分析了光纤信道特性,根据影响OFDM信号传输的因素,提出了基于OFDM技术的ROF系统通信系统实现方案。
With the increasing demand for high-speed data communications services, the future of communications will gradually move towards high frequency and broadband. As one of the key technologies in the fourth generation mobile communication system, Orthogonal Frequency Division Multiplexing OFDM technology can greatly improve the spectrum efficiency of wireless communication and overcome the intersymbol interference. Optical fiber wireless transmission ROF system fully combines the characteristics of optical fiber and high frequency radio wave transmission, enabling high-capacity, low-cost wireless signal transmission of wired and broadband wireless access. The combination of the two has become a hot spot in optical communications research in recent years. This paper mainly introduces the OFDM-ROF system model, analyzes the characteristics of the fiber channel, and puts forward the scheme of the ROF system communication system based on the OFDM technology according to the factors affecting the OFDM signal transmission.