LTE Carrier Frequency and EARFCN


EARFCN stands for E-UTRA Absolute Radio Frequency Channel Number.In LTE, the carrier frequency in the uplink and downlink is designated by EARFCN, which ranges between 0-65535.

  • EARFCN uniquely identify the LTE band and carrier frequency.
    For example Band-1 and Band-4 can have same Rx frequency 2110-2170 MHz,  but their EARFCN are different.
  • EARFCN is independent of channel bandwidth.

DOWNLINK

The relation between downlink EARFCN(N_{DL}) and its downlink carrier frequency(F_{DL}) is given by equation below

(1)   \begin{equation*} F_{DL} = F_{DL\_low} + 0.1(N_{DL} - N_{Offs-DL}) \end{equation*}

where,
N_{Offs-DL} – EARFCN Downlink offset. This depends on band number.
F_{DL\_low} – carrier downlink lowest frequency in a given band

UPLINK

The relation between uplink EARFCN(N_{UL}) and uplink carrier frequency(F_{UL}) is given by equation below

(2)   \begin{equation*} F_{UL} = F_{UL\_low} + 0.1(N_{UL} - N_{Offs-UL}) \end{equation*}

where,
N_{Offs-UL} – EARFCN uplink offset. This depends on band number.
F_{UL\_low} – carrier uplink lowest frequency in a given band

EARFCN of carrier frequency can be calculated with Eq-(1) or Eq-(2) using FDL_low, NOffs-DL, FUL_low and NOffs-UL given in table below.

 Downlink  Uplink   
BandFDL_low (MHz)NOffs-DLNDL RangeFUL_low (MHz)NOffs-ULNUL Range
1211000-59919201800018000-18599
21930600600-119918501860018600-19199
3180512001200-194917101920019200-19949
4211019501950-239917101995019950-20399
586924002400-26498242040020400-20649
687526502650-27498302065020650-20749
7262027502750-344925002075020750-21449
892534503450-37998802145021450-21799
91844.938003800-41491749.92180021800-22149
10211041504150-474917102215022150-22749
111475.947504750-49491427.92275022750-22949
1272950105010-51796992301023010-23179
1374651805180-52797772318023180-23279
1475852805280-53797882328023280-23379
1773457305730-58497042373023730-23849
1886058505850-59998152385023850-23999
1987560006000-61498302400024000-24149
2079161506150-64498322415024150-24449
211495.964506450-65991447.92445024450-24599
22351066006600-739934102460024600-25399
23218075007500-769920002550025500-25699
24152577007700-80391626.52570025700-26039
25193080408040-868918502604026040-26689
2685986908690-90398142669026690-27039
2785290409040-92098072704027040-27209
2875892109210-96597032721027210-27659
29271796609660-9769N/A-
31462.598709870-9919452.52776027760-27809
...-
3319003600036000-3619919003600036000-36199
3420103620036200-3634920103620036200-36349
3518503635036350-3694918503635036350-36949
3619303695036950-3754919303695036950-37549
3719103755037550-3774919103755037550-37749
3825703775037750-3824925703775037750-38249
3918803825038250-3864918803825038250-38649
4023003865038650-3964923003865038650-39649
4124963965039650-4158924963965039650-41589
4234004159041590-4358934004159041590-43589
4336004359043590-4558936004359043590-45589
447034559045590-465897034559045590-46589

Ref: ETSI TS 136 521-1 V11.2.0 (2013-10)

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