Android Socket 文件传输

发送端用Socket发送指定路径的文件给接收端，接收端将文件存储到指定路径。

android 4 (实测4.3和4.4可以用) 响铃5秒后自动接电话

开发工具为eclipse，一个BroadcastReceiver监听电话状态，响铃则启动接电话的Service。

cc2541数据手册

Fundamentals of Wireless Communication

The writing of this book was prompted by two main developments in wireless communications in the past decade. First is the huge surge of research activities in physical-layer wireless communication theory. While this has been a subject of study since the 60’s, recent developments in the field, such as opportunistic and multi-input multi-output (MIMO) communication techniques, have brought completely new per- spectives on how to communicate over wireless channels. Second is the rapid evolution of wireless systems, particularly cellular networks, which embody communication con- cepts of increasing sophistication. This evolution started with second-generation digital standards, particularly the IS-95 Code Division Multiple Access standard, and contin- uing onto more recent third-generation systems focusing on data applications. This book aims to present the modern wireless communication concepts in a coherent and unified manner and to illustrate the concepts in the broader context of the wireless systems on which they have been applied