4g通信技术论文
4g通信技术论文 有些网友觉得4g通信技术论文难写,可能是因为没有思路,所以小编 为大家带来了相关的例文,希望能帮到大家! 4G移动通信篇一 4G移动通信 摘要:4G指的是第四代移动通信技术。该技术包括TD-LTE和 FDD-LTE两种制式。4G是集3G与WLAN于一体,并能够快速传输数据、高质量 音频、视频和图像等。4G能够以100Mbps以上的速度下载,比目前的家用宽带 ADSL(4兆)快20倍,并能够满足几乎所有用户对于无线服务的要求。此外,4G 可以在DSL和有线电视调制解调器没有覆盖的地方部署,然后再扩展到整个地区。很明显,4G有着不可比拟的优越性。
关键词:第四代,高速,广域 Abstract: 4G refers to the fourth generation mobile communication technology.The technology includes TD-LTE and FDD-LTE standard two. 4G is a set of 3G and WLAN in one, and can fast data transfer, high quality audio, video and imageetc.. 4G to 100Mbps above the download speed, than the home broadband ADSLcurrent (4000000000000) 20 times as fast, and able to satisfy almost all user requirements for wireless service. In addition, 4G in the DSL and cable modemareas not covered by the deployment, and then extended to the entire area.Obviously, 4G has the incomparable superiority Keyword: the fourth generation, high speed,wide area 目录 一、移动通信发展的背景............................................. II 1、第一代移动通信技术(1G)................................... 1 2、第二代移动通信技术(2G)................................... 1 3、第三代移动通信技术(3G)................................... 1 二、4G移动通信简介 ................................................. 1三、4G系统网络结构 ................................................. 2 四、4G网络系统的关键技术 ........................................... 2 (4.1)OFDMA技术 .............................................. 2 (4.2)软件无线电 .............................................. 2 (4.3)智能天线(SA) .......................................... 3 五、4G网络系统的技术标准 ........................................... 3 5.1 WiMAX(802.16e)............................................ 3 5.2 LTE(Long Term Evolution).................................. 3 5.3 UMB(Ultra Mobile Broadband)............................... 5 六、4G网络的发展趋势 ............................................... 5 七、心得体会........................................................ 6