Study on Optic-Radio Boundary Communication System

本课题的研究目标是在光-无线边界通信系统中提出光纤微蜂窝个人通信系统，实现灵活、通用、高功能的个人无线通信的最佳信号处理。我们建立了光学的理论模型，光纤和无线电通信链路，并考虑到链路中的噪声，衰落，并从理论上分析了SCM无线信号在IM/DD光链路中的传输性能。研究结果如下：（1）阐明了最优M进制调制格式与链路总容量之间的关系。(2)我们已经提出了三种新的信号处理类型，即，抑制LD非线性引起的IM 3的自适应射频分配方法、小区间分集方案、分组FM方案、 ...更多信息 1994年，我们从理论上研究了光纤通信系统中的光纤通信方案、总线型小区间光纤连接、小区间分集和容量控制调制等问题。（1）提出了光纤无线高速公路网络，该网络系统可以向任意远程控制站开放任意小区的无线自由空间，并可以根据移动的用户或服务提供商的需求即时切换无线自由空间。(2)提出了一种新型的无线信号时分复用光纤传输方法，采用带通采样技术，为无线信号的调制格式、数据速率和频率提供了高度的灵活性和通用性。（3）提出了采用射频-光直接转换方案的大容量无线高速公路网。(4)提出了一种新的多载波调制的小区间分集。(5)提出了自适应调制和信源信道综合编码方案。少

The object of our study has been oriented to the proposal of fiber-optic microcellular personal communication system in Optic-Radio boundary communication systems and the realization of optimal signal processing for flexible, universal and high-functional personal radio communications.In 1993, we constructed the theoretical model of optic-fiber and radio communication links and conposed the signal transmission simulator taking into account several immunity factors in the links such as noises, fading, nonlinearity and so on. Furthermore, we have analyzed the signal transmission performance of SCM radio signals in IM/DD optical links, theoretically. The results are as follows :(1) The relationship betweem the optimal M-ary modulation format and the total link capacity is clarified.(2) We have proposed three new types of signal processing, i.e., the adaptive radio frequency allocating method to reject the IM3 due to the nonlinearity of LD,the intercell diversity scheme, the group FM schem … More e for the fiber optic transmission of the SCM signal.In 1994, we have studied on the applicaion of conferent optical communication scheme, bus type intercell fiber optic connection, intercell diversity and capacity controlled modulations for the fiber-optic microcellular communication system, theoretically. The following results have been found ;(1) The proposal of fiber-optic radio highway networks where the system can open the radio free space of any cells to any remote control station, and can switch the radio free space instantaneously according to the demands of the mobile users or service provider.(2) The proposal of a new type of TDM fiber transmission method for radio signals using bandpass sampling to offer the high flexibility and nuiversality for the modulation format, data rate and frequency of the radio signal(3) The proposal of high capacity radio highway networks using RF-Optic direct conversion scheme.(4) The proposal of the intercell diversity using a new multicarrier modulation.(5) The proposal of adaptive, modulation and the channel-and-source integrated coding scheme. Less