CAJ | 학술논문

中国电信大量建设1850-1880MHz频段4G LTE FDD试验网，对中国移动所建1880-1900MHz的TD-SCDMA/TD-LTE商用网在多省产生严重干扰。为消除干扰，有单位提出，中间需要的5MHz保护频带由TDD侧提供，同时TDD对应频段要提高射频指标。针对这一不恰当的处理方法，分析了其对TD网络、TD-S终端和TD-LTE国际化推广所可能造成的严重影响，并提出了一种恰当的方法：把后用的FDD频段的下行1875-1880MHz作为保护频带，同时维持2012年工业和信息化部颁布的相关设备的射频指标规定。
중국전신대량건설1850-1880MHz빈단4G LTE FDD시험망，대중국이동소건1880-1900MHz적TD-SCDMA/TD-LTE상용망재다성산생엄중간우。위소제간우，유단위제출，중간수요적5MHz보호빈대유TDD측제공，동시TDD대응빈단요제고사빈지표。침대저일불흡당적처리방법，분석료기대TD망락、TD-S종단화TD-LTE국제화추엄소가능조성적엄중영향，병제출료일충흡당적방법：파후용적FDD빈단적하행1875-1880MHz작위보호빈대，동시유지2012년공업화신식화부반포적상관설비적사빈지표규정。
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.