LTE CAT MODEMS

 LTE Category M is part of the LTE specification and has been designed to offer a low power solution with a low data rate which is ideal for IoT solutions. The specification was introduced in 2016 and is scheduled for 3GPP release 13. Part of the 5G specification includes enhanced machine type communication (eMTC) which will link to the NB IoT and category M LTE standards and form the basis for the future MTC of the 5G network.

The specification also defines orthogonal frequency-division multiplexing (OFDM) for connection uplink and single carrier frequency division multiplex (SC-FDMA) connection downlink and the bandwidth is limited to 1.4Mbit/s.


This table shows the defined LTE narrowband categories.

LTE Cat 1LTE Cat 0LTE Cat M1 (eMTC)LTE Cat NB1 (NB-IoT)EC-GSM-IoT
3GPP ReleaseRelease 8Release 12Release 13Release 13Release 13
Downlink Peak Rate10 Mbit/s1 Mbit/s1 Mbit/s250 kbit/s474 kbit/s (EDGE)
2 Mbit/s (EGPRS2B)
Uplink Peak Rate5 Mbit/s1 Mbit/s1 Mbit/s250 kbit/s (multi-tone)474 kbit/s (EDGE)
20 kbit/s (single-tone)2 Mbit/s (EGPRS2B)
Latency50–100msnot deployed10ms–15ms1.6s–10s700ms–2s
Number of Antennas21111–2
Duplex ModeFull DuplexFull or Half DuplexFull or Half DuplexHalf DuplexHalf Duplex
Device Receive Bandwidth1.4 – 20 MHz1.4 – 20 MHz1.4 MHz180 kHz200 kHz
Receiver Chains2 (MIMO)1 (SISO)1 (SISO)1 (SISO)1–2
Device Transmit Power23 dBm23 dBm20 / 23 dBm20 / 23 dBm23 / 33 dBm

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