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Configuration options include:

Carrier frequency (in MHz)

Transmit power sweep for BER and throughput test (TxOutLvlStart_dBm, TxOutLvlSpan_dBm, TxOutLvlStep_dBm).

The TxOutLvl parameters are specified for "total transmit power". The BER plot, however,

uses derived "per-subcarrier power" in the x-axis so that the BER performance of various

subcarrier modes can be compared.

NB-IoT subcarrier mode (NBIoT_SCMode)

            0: 3.75kHz single tone (use NBIoT_SCAssign parameter to specify between 0-47)

            1: 15kHz single tone (use NBIoT_SCAssign parameter to specify between 0-11)

            2-5: 15kHz three tone {0,1,2}, {3,4,5}, {6,7,8}, or {9,10,11}

            6,7: 15kHz six tone {0,1,...,5} or {6,7,..., 11}

            8: 15kHz with twelve tone

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•NB-IoT subcarrier assignment when NBIoT_SCMode is 0 or 1 (NBIoT_SCAssign)

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•NB-IoT resource block location (NBIoT_RB)

            - Use NBIoT_RB<0 or NBIoT_RB>N_RB_UL for guard band operation

            - Use NBIoT_RB between 0 and N_RB_UL for in-band operation

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•NB-IoT modulation type (NBIoT_ModType)

            - Supports pi/2-BPSK or pi/4-QPSK (rotated)

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•LTE source has selectable UL RB occupancy using N_RB_Channel. Default is {15,34} which means that the PUSCH0 occupies the first 15RBs and PUSCH2 the 34RBs. N_RB_Buffers parameter is used to select the buffer RBs between PUSCH0 and PUSCH1. Default setting is N_RB_Buffer=1 such that RB location 16 is left open for NB-IoT transmission. Thus selecting "NBIoT_RB=15" places the NB-IoT signal in RB location 16 which is blanked in the LTE UL configuration.

The test bench can be used to monitor:

The TX signal spectrum at various points in the link

NB-IoT link performance in the presence of LTE UL signal

IQ constellation of the transmitted and demodulated signals

Bit error rate (BER), block error rate (BLER), and throughput

CRC error for each block

References:

TS 36.211 Release 13, Chapter 10

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