FDD LTE frequency band allocations
There is a large number of allocations or radio spectrum that has been reserved for FDD, frequency division duplex, LTE use.
The FDDLTE frequency bands are paired to allow simultaneous transmission on two frequencies. The bands also have a sufficient separation to enable the transmitted signals not to unduly impair the receiver performance. If the signals are too close then the receiver may be "blocked" and the sensitivity impaired. The separation must be sufficient to enable the roll-off of the antenna filtering to give sufficient attenuation of the transmitted signal within the receive band.
| LTE BAND NUMBER | UPLINK (MHZ) | DOWNLINK (MHZ) | WIDTH OF BAND (MHZ) | DUPLEX SPACING (MHZ) | BAND GAP (MHZ) |
|---|---|---|---|---|---|
| 1 | 1920 - 1980 | 2110 - 2170 | 60 | 190 | 130 |
| 2 | 1850 - 1910 | 1930 - 1990 | 60 | 80 | 20 |
| 3 | 1710 - 1785 | 1805 -1880 | 75 | 95 | 20 |
| 4 | 1710 - 1755 | 2110 - 2155 | 45 | 400 | 355 |
| 5 | 824 - 849 | 869 - 894 | 25 | 45 | 20 |
| 6 | 830 - 840 | 875 - 885 | 10 | 35 | 25 |
| 7 | 2500 - 2570 | 2620 - 2690 | 70 | 120 | 50 |
| 8 | 880 - 915 | 925 - 960 | 35 | 45 | 10 |
| 9 | 1749.9 - 1784.9 | 1844.9 - 1879.9 | 35 | 95 | 60 |
| 10 | 1710 - 1770 | 2110 - 2170 | 60 | 400 | 340 |
| 11 | 1427.9 - 1452.9 | 1475.9 - 1500.9 | 20 | 48 | 28 |
| 12 | 698 - 716 | 728 - 746 | 18 | 30 | 12 |
| 13 | 777 - 787 | 746 - 756 | 10 | -31 | 41 |
| 14 | 788 - 798 | 758 - 768 | 10 | -30 | 40 |
| 15 | 1900 - 1920 | 2600 - 2620 | 20 | 700 | 680 |
| 16 | 2010 - 2025 | 2585 - 2600 | 15 | 575 | 560 |
| 17 | 704 - 716 | 734 - 746 | 12 | 30 | 18 |
| 18 | 815 - 830 | 860 - 875 | 15 | 45 | 30 |
| 19 | 830 - 845 | 875 - 890 | 15 | 45 | 30 |
| 20 | 832 - 862 | 791 - 821 | 30 | -41 | 71 |
| 21 | 1447.9 - 1462.9 | 1495.5 - 1510.9 | 15 | 48 | 33 |
| 22 | 3410 - 3500 | 3510 - 3600 | 90 | 100 | 10 |
| 23 | 2000 - 2020 | 2180 - 2200 | 20 | 180 | 160 |
| 24 | 1625.5 - 1660.5 | 1525 - 1559 | 34 | -101.5 | 135.5 |
| 25 | 1850 - 1915 | 1930 - 1995 | 65 | 80 | 15 |
TDD LTE frequency band allocations
With the interest in TDD LTE, there are several unpaired frequency allocations that are being prepared for LTR TDD use. The TDD LTE allocations are unpaired because the uplink and downlink share the same frequency, being time multiplexed.
| LTE BAND NUMBER | ALLOCATION (MHZ) | WIDTH OF BAND (MHZ) |
|---|---|---|
| 33 | 1900 - 1920 | 20 |
| 34 | 2010 - 2025 | 15 |
| 35 | 1850 - 1910 | 60 |
| 36 | 1930 - 1990 | 60 |
| 37 | 1910 - 1930 | 20 |
| 38 | 2570 - 2620 | 50 |
| 39 | 1880 - 1920 | 40 |
| 40 | 2300 - 2400 | 100 |
| 41 | 2496 - 2690 | 194 |
| 42 | 3400 - 3600 | 200 |
| 43 | 3600 - 3800 | 200 |
There are regular additions to the LTE frequency bands / LTE spectrum allocations as a result of negotiations at the ITU regulatory meetings. These LTE allocations are resulting in part from the digital dividend, and also from the pressure caused by the ever growing need for mobile communications. Many of the new LTE spectrum allocations are relatively small, often 10 - 20MHz in bandwidth, and this is a cause for concern. With LTE-Advanced needing bandwidths of 100 MHz, channel aggregation over a wide set of frequencies many be needed, and this has been recognised as a significant technological problem. . . . . . . . .
Additional information on LTE frequency bands.