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archiveMarch 23, 2019

LTE Tutorial Long-Term Evolution 

Narrow Band-Physical Broadcast Channel (NPBCH)

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NPBCH stands for narrow band physical broadcast channel similar to PBCH in LTE Technology. The NPBCH is used to deliver the NB-IoT Master Information Block (MIB), which provides essential information for the NB-IOT UE to operate in the NB-IoT network. NPBCH uses a 640 ms TTI, but within the TTI only subframe 0 is used in every radio frame. NPBCH is transmitted in entire subframe zero of a radio frame (except initial 3 OFDM symbols). Subframe Location: 0 Subframe periodicity: 10 ms Basic TTI 640 ms NPBCH Channel Characteristics. NPBCH...
LTE Tutorial Long-Term Evolution 

Cat. NB1 and Cat. NB2 Devices Comparison

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Narrow Band IoT specifications was first introduced in 3GPP release 13 and then further enhanced in 3GPP release 14 with some essential features. Release 13 NB-IoT device category is referred as Cat NB1 or Cat N1 and Release 14 devices are referred as Cat NB2 or Cat N2. Parameter Cat. NB1 Cat. NB2 3GPP Release Specification Release 13 Release 14 Operation Mode FDD FDD No. of Rx Antenna 1 1 Tx Power Class 20, 23 dBm 14, 20, 23 dBm Maximum Channel Bandwidth 180 KHz 180 KHz Highest Modulation for...