Carrier frequency and EARFCN
2013-11-06 14:41
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Carrier frequency and EARFCN
2012-09-14 10:35:31| 分类: 通信|字号 订阅TD-LTE的频点号称为EARFCN,也就是在ARFCN基础上做了改进。
EARFCN与频率之间不再是直接对应,而是增加了一个偏置(起始值),以保证EARFCN编号连续。
FDD的EARFCN从0~35999,TDD的EARFCN从36000~65531。
目前国内使用的38频段,EARFCN的起始值为37750,频率的起始值为2.57GHz,每100kHz对应一个频点号。比如2.6GHz,对应的EARFCN就是37750+300=38050。
3GPP TS 36.104 V11.1.0 (2012-07) 5.7.3 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 FUL_low and NOffs-UL are given in table 5.7.3-1 and NUL is the uplink EARFCN. FUL = FUL_low + 0.1(NUL – NOffs-UL) Table 5.7.3-1: E-UTRA channel numbers
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