随着用户对移动通信系统的速率要求不断提高.3G系统实际所能提供的最高速率已不能满足未来市场的实际需求.因而在3G系统还没有大规模投入商用的情况下,国内外移动通信领域的专家已经在进行4G系统的研究和开发工作。4G是多功能集成的宽带移动通信系统,具有许多关键优势.因而已成为移动通信领域的研究热点。文章给出了4G的体系结构.并对4G相关技术的原理进行了详细分析。
With the increase of subscriber demand for mobile communication system, the highest data rate provided by 3G can not fulfill the practical requirement. Experts in communication field are engaging in researching and developing 4G communication system, although 3G has not been widely deployed for commercial application. 4G is a wideband mobile communication system which can provide multiple functions and possess many critical advantages, so it is becoming the research hotspot of mobile communication. This paper proposes the system structure of 4G, then analyzes the principle of 4G technologies in detail.