Analysis on the Problem of 4G LTE FDD Trial Network Seriously Interfering with 3G/4G TD Commercial Network

作者：LI Jin liang

来源：移动通信, 2014, (6).

DOI：10.3969/j.issn.1006-1010.2014.06.009

• LTE FDD
• TDD
• F band
• guard band

The 4G LTE FDD testing network on 1850-1880MHz band established by China Telecom has severe interference to the commercial TD-SCMA/TDD-LTE network built by China Mobile in multiple provinces. In order to eliminate the interference, it is pointed out that the protection bandwidth of 5MHz is guaranteed by TDD, while the RF specification relevant to the TDD band should be enhanced. According to the improper approach, its influences on TD network, TD-S terminal and internationalized TD-LTE are analyzed. An appropriate approach is proposed in which the downlink of 1875-1880MHz of FDD band is used to be the protection bandwidth. It conforms to the RF specification promulgated by China's Ministry of Industry and Information Technology in 2012.

• 单位
  中国电子科技集团公司第七研究所