LTE信道计算公式.pdf

FAQ-LTE 频点信道编号计算方法 内部公开 1. 在 UMTS 系统中，配置上下行频点时的频点号计算方法很简单，就是上下行频点号直 接乘以5 就可以了。如下式所示：以下行为例 UARFCN Downlink = DL Frequency * 5 ； 如果下行频点为 2157.4，则信道编号很容易计算得出为 10787.反之，如果知道信道 编号，也很容易计算得出所用的真实频点。 2. LTE 中同样也需要配置对应频点的信道编号，也就是E-UTRA Absolute Radio Frequency Channel Number (EARFCN)，但这个配置相对于WCMDA 来说，很复杂，基本上不可能 手工计算，需要根据协议查表计算。根据协议3GPP 36.104 规定，EARFCN 按下面的描 述进行计算。 Carrier frequency and EARFCN The carrier frequency in the uplink and downlink is designated by the E-UTRA Absolute Radio Frequency Channel Number (EARFCN) in the range 0 - 65535. The relation between EARFCN and the carrier frequency in MHz for the downlink is given by the following equation, where FDL_low and NOffs-DL are given in table 5.7.3-1 and NDL is the downlink EARFCN. FDL = FDL_low + 0.1(NDL – NOffs-DL) The relation between EARFCN and the carrier frequency in MHz for the uplink is given by the following equation where F and N are given in table 5.7.3-1 and N is the uplink UL_low Offs-UL UL EARFCN. FUL = FUL_low + 0.1(NUL – NOffs-UL) 2014-12-01 HUAWEI Confidential Page 1, Total3 FAQ-LTE 频点信道编号计算方法 内部公开 Table 5.7.3-1 E-UTRA channel numbers Downlink Uplink E-UTRA Operating FDL_low NOffs-DL Range of NDL FUL_low [MHz] NOffs-UL