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(1)RadioTransmission Interface of The Digital Pan European Mobile System泛欧数字移动通信系统无线电发射接口引言The paper describes the radio interface format of the system, which was selected after comparing hardware experimental equipment, based on different radio access techniques (FDMA, TDMA, ...) as well as different modulation and coding schemes. After presenting the selection process, a description of the radio interface specification is made, together with a presentation of the expected performance in terms of frequency reuse. Hardware results from measurements of a validation system built in France according to this specification are a1so presented.本文描述的系统的无线电接口格式，这是比较硬的实验设备选中后，根据不同的无线电接入技术（FDMA，TDMA，...），以及不同的调制和编码方案。
呈现所述选择过程之后，无线接口规范的描述是，在频率复用的术语介绍的预期性能的一起。
从按照本说明书在法国建造一个验证系统的硬件的测量结果a1so呈现。
(2)The Wireless Revolution无线革命AbstractCurrent demand for and recent developments in wireless communication are described. Funding for wireless worldwide is examined. Tools and techniques used to characterize radio propagation are discussed, and some research results are presented对于目前的需求和近期发展无线通信的描述。
收音机电路的设计(总9页)--本页仅作为文档封面，使用时请直接删除即可----内页可以根据需求调整合适字体及大小--题目调幅收音机电路的设计姓名孔令鑫学号 0205所在系电子电气工程系专业年级P10电子信息二O一一年十二月三十目录一、设计的目的、意义................................................................................. 错误!未定义书签。
二、方框图的设计 ............................................................................................ 错误!未定义书签。
三、单元电路设计 ............................................................................................ 错误!未定义书签。
四、设计的电路原理图................................................................................. 错误!未定义书签。
五、设计总结 ....................................................................................................... 错误!未定义书签。
六、参考文献 ....................................................................................................... 错误!未定义书签。
一、设计技术指标收音机的基本工作原理：天线收到电磁波信号，经过调谐器选频后，选出要接收的电台信号。
