Half-Sine Waveform Design for Narrowband IoT | IEEE Conference Publication | IEEE Xplore

Half-Sine Waveform Design for Narrowband IoT


Abstract:

Narrowband Internet of Things (NB-IoT) is a cellular based IoT technique, which can send messages at a long distance using repetitive transmission and single tone frequen...Show More

Abstract:

Narrowband Internet of Things (NB-IoT) is a cellular based IoT technique, which can send messages at a long distance using repetitive transmission and single tone frequency hopping. However, retuning of the RF frontend for each narrowband hop could cause frequency offset. Since each tone is shaped by a sinc pulse, when combining tones into a complete signal at the receiver, the side lobe of the sinc pulse would result in significant signal interference in the frequency offset condition. In this work, we propose a half-sinc (HS) waveform for uplink channels via cutting half band using the Hilbert transform to intentionally reserve a frequency offset protection gap. It is verified that the half-sinc waveform can tolerate up to 100% frequency offset via simulation and can practically remove the half side signal band in a software defined IoT platform.
Date of Conference: 09-12 September 2018
Date Added to IEEE Xplore: 20 December 2018
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Conference Location: Bologna, Italy

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