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Thus, as a unit, each RB is made up of 12 OFDM subcarriers and 7 OFDM symbols, with each subcarrier having bandwidth of 15 KHz, giving us total bandwidth of 180 KHz per RB.
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LTE UE Category & Class Definitions
3GPP Release 8 defines five LTE user equipment categories depending on maximum peak data rate and MIMO capabilities support. With 3GPP Release 10, which is referred to as LTE Advanced, three new categories have been introduced, and four more with 3GPP Release 11
User | Max. L1 | Max. number | Max. L1 | 3GPP Release |
|---|---|---|---|---|
NB1 | 0.68 | 1 | 1.0 | Rel 13 |
M1 | 1.0 | 1 | 1.0 | |
0 | 1.0 | 1 | 1.0 | Rel 12 |
1 | 10.3 | 1 | 5.2 | Rel 8 |
2 | 51.0 | 2 | 25.5 | |
3 | 102.0 | 2 | 51.0 | |
4 | 150.8 | 2 | 51.0 | |
5 | 299.6 | 4 | 75.4 | |
6 | 301.5 | 2 or 4 | 51.0 | Rel 10 |
7 | 301.5 | 2 or 4 | 102.0 | |
8 | 2,998.6 | 8 | 1,497.8 | |
9 | 452.2 | 2 or 4 | 51.0 | Rel 11 |
10 | 452.2 | 2 or 4 | 102.0 | |
11 | 603.0 | 2 or 4 | 51.0 | |
12 | 603.0 | 2 or 4 | 102.0 | |
13 | 391.7 | 2 or 4 | 150.8 | Rel 12 |
14 | 3,917 | 8 | 9,585 | |
15 | 750 | 2 or 4 | 226 | |
16 | 979 | 2 or 4 | n/a | |
17 | 25,065 | 8 | n/a | |
18 | 1174 | 2 or 4 or 8 | n/a | Rel 13 |
19 | 1566 | 2 or 4 or 8 | n/a |
Note: Maximum datarates shown are for 20 MHz of channel bandwidth. Categories
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6 and above include datarates from combining multiple 20 MHz channels using Carrier Aggregation. Maximum datarates will be lower if less bandwidth is utilized.
Note: These are L1 transport data rates not including the different protocol layers overhead. Depending on cell BW, cell load, network configuration, the performance of the UE used, propagation conditions, etc. practical data rates will vary.
Note: The 3.0 Gbit/s / 1.5 Gbit/s data rate specified as Category 8 is near the peak aggregate data rate for a base station sector. A more realistic maximum data rate for a single user is 1.2 Gbit/s (downlink) and 600 Mbit/s (uplink). One vendor has demonstrated downlink speeds of 1.4 Gbit/s using 100 MHz of aggregated spectrum.
Other Key Configurations | Description |
|---|---|
Duplexing | FDD, TDD, Half duplex FDD |
Channel Coding | Turbo Code |
Channel Bandwidth (# of subcarriers) | 1.4(72), 3(198), 5(330), 10(660), 15(990),20(1320) |
Transmission Bandwidth Configuration NRB : (1 resource block = 180kHz in 1ms TTI=Transmission Time Interval ) | 6, 15, 25, 50, 75, 100 |
Modulation Schemes | UL: QPSK, 16QAM, 64QAM(optional) DL: QPSK, 16QAM, 64QAM |
Multiple Access Schemes | UL: SC-FDMA (Single Carrier Frequency Division Multiple Access) supports 50Mbps+ (20MHz spectrum) DL: OFDM (Orthogonal Frequency Division Multiple Access) supports 100Mbps+ (20MHz spectrum) |
Peak data rate in LTE | UL: 75Mbps(20MHz bandwidth) DL: 150Mbps(UE Category 4, 2x2 MIMO, 20MHz bandwidth) DL: 300Mbps(UE category 5, 4x4 MIMO, 20MHz bandwidth) |
Some Parameters | Physical Cell identifier (PCI), RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality) |
Uplink Channels | PUSCH: Physical uplink shared channel PUCCH: Physical Uplink Control Channel PRACH: Physical Random Access Channel |
Downlink Channels | PBCH: Physical Broadcast Channel PCFICH: Physical Control Format Indicator Channel PHICH: Physical Indicator Channel PDCCH: Physical Downlink Control Channel PDSCH: Physical Downlink Shared Channel |
Operating Bands
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LTE In Signal Pro
Signal Pro is a market leading software that caters for a suite of technologies, including LTE. There are two options available. LTE and LTE PRO. LTE is the legacy LTE module. LTE-PRO module is the updated LTE module with the latest 3GPP standards for LTE-A pro.
To navigate to the LTE module, click on: Network Design/Analysis-> LTE Networks. You will see the options available as illustrated in the screenshot below
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In System Details/Service Area, there are configuration options available to select duplex type and bandwidth to cater for all possible scenarios as detailed in the configuration section.
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The System Profile option chosen from above will automatically self populate information below.
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At the radio transmitter and sector level, there are also options to identify the system type as LTE or LTE PRO
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