Study on Optic-Radio Boundary Communication System

本课题的研究目标是在光-无线电边界通信系统中提出光纤微蜂窝个人通信系统，以实现灵活、通用、高功能的个人无线电通信的信号处理优化。1993年，我们建立了光纤和无线电通信链路的理论模型，并建立了信号传输模拟器，考虑了链路中的噪声、衰落、非线性等多种干扰因素。此外，从理论上分析了SCM无线电信号在IM/DD光链路中的信号传输性能。(2)提出了三种新的信号处理方法，即基于LD的非线性抑制IM3的自适应射频分配方法、小区间分集方案、分组FM…方案1994年，我们从理论上研究了会议光通信方案、总线型小区间光纤连接、小区间分集和容量控制调制在光纤微蜂窝通信系统中的应用。发现了以下结果；(1)光纤无线高速路网的建议，系统可以向任何远程控制站开放任何小区的无线空闲空间，并可以根据移动用户或服务提供商的需求即时切换无线空闲空间。(2)提出一种新型的TDM光纤无线信号传输方法，采用带通采样，为无线电信号的调制格式、数据速率和频率提供高度的灵活性和通用性。(3)采用射频-光纤直接转换方案的大容量无线高速公路网的建议。(4)采用新的多载波调制的小区间分集的建议。(5)自适应、调制和信道-信源综合编码方案。较少

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