aduo75的博客

一本关于第三代无线通信的好书。 This is a book about the technological foundations of the next generation of wireless networks, including the so-called third generation, or 3G, for the mobile Internet. It is a vast subject, encompassing a variety of new services, applications, and air interfaces. In this book I have focused on the lowest layers of the system: how the wireless information-bearing signal is constructed, and the choice of physical-layer transmission techniques and coding strategies capable of withstanding the extreme environment of the wireless channel.

Analog Devices 公司的射频应用工程师Jeffrey Feigin写的一篇关于科斯塔斯环设计的实用文章。文中对科斯塔斯环的设计进行了详细的分析和说明，是一篇不可多得的科环设计好文章。

介绍移动通信中用到的各种调制技术,给出各种常用数字调制方式的表达式，时域波形，一些调制方式还给出了相关的频谱形状