为了充分利用超宽带的特点，对数字光载无线系统进行了改进，并给出了系统模型。
To utilize the properties of ultra-wide bandwidth, the structure of ultra-wide bandwidth digital radio-on-fiber system was modified, and the system model was illustrated.
急速增长的网络带宽需求和更加便利的接入条件是光载无线技术研究和应用的两个重要推动力。
The rapid increase of network bandwidth demand and more convenient access environment are two driving forces for radio over fiber research and development.
通过在光纤中传输射频信号，研究既能利用光纤巨大带宽，又能发挥无线通信灵活方便等优势的光载无线技术得到了世界范围内的广泛关注。
Under this background, the research of radio over fiber which combines both advantages of wireless access and wired access is attracting attentions both from academia and industry all over the world.
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