低成本光载多带正交频分复用超宽带信号的产生和传输研究

项目名称： 低成本光载多带正交频分复用超宽带信号的产生和传输研究

项目编号： No.61307087

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 何晶

作者单位： 湖南大学

项目金额： 24万元

中文摘要： 光载多带正交频分复用超宽带是提供未来吉比特速率无线信号宽带接入极有潜力的方案。可是，目前的相关研究存在系统实现复杂、成本高、传输性能需要提高等问题。基于本项目组已实现60GHz正交频分复用的光纤无线通信系统实验，本项目拟在此基础上探索低成本的光学产生多带正交频分复用超宽带信号的方法，首次将多带正交频分复用超宽带信号在光纤和无线信道中的传输看成一个整体，建立统一的数学模型，系统研究其传输特性并进行优化；提出一种新的信道编码和信道估计算法降低光纤信道的非线性失真和光纤色散对多带正交频分复用超宽带信号的影响；最后通过实验验证提出的方法和算法的性能。本项目所取得的创新性成果对实现超宽带信号与光纤接入技术的融合，促进我国无线宽带接入网的发展具有理论和实际价值。

中文关键词： 光载多带正交频分复用超宽带信号；光纤无线通信系统；信道编码；信道估计算法；

英文摘要： The multi-band orthogonal frequency division multiplexing ultra-wideband singal over radio-over-fiber system is raising great interest since they allow for high data throughput with low power consumption which is very applicable to the digital home requirements. However, there are some problems such as complex, high cost and low transmission performance exist in current related research. And the theory of multi-band orthogonal frequency division multiplexing ultra-wideband singal over radio-over-fiber system and the study on the fiber transmission performance have not been reported. In the project, we propose and experiment a cost-effective method of optical multi-band orthogonal frequency division multiplexing ultra-wideband signal generation. In order to investigate the transmission performance of ultra-wideband signal over radio-over-fiber system, we develop mathematical models for optical and wireless components such as laser diode, external modulator, single mode fiber, air interface. Using these models, we evaluate the transmission performance of ultra-wideband signals over single mode fiber and wireless transmission. Meanwhile channel coding and channel estimation algorithm are proposed to improve the transmission performance of multi-band orthogonal frequency division multiplexing ultra-wideband signal

英文关键词： optical multi-band OFDM ultra-wideband signal；radio-over-fiber system；channel coding；channel estimation algorithm；