eprintid: 10047182 rev_number: 41 eprint_status: archive userid: 608 dir: disk0/10/04/71/82 datestamp: 2018-04-20 09:56:26 lastmod: 2021-10-29 22:41:25 status_changed: 2019-02-25 16:51:14 type: article metadata_visibility: show creators_name: Xu, T creators_name: Darwazeh, I title: Non-Orthogonal Narrowband Internet of Things: A Design for Saving Bandwidth and Doubling the Number of Connected Devices ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F46 keywords: Internet of Things, narrowband, NB-IoT, 5G, LPWAN, MTC, M2M, non-orthogonal, waveform, spectral effi- ciency, testbed, experiment note: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/. abstract: IEEE Narrowband IoT (NB-IoT) is a low power wide area network (LPWAN) technique introduced in 3GPP release 13. The narrowband transmission scheme enables high capacity, wide coverage and low power consumption communications. With the increasing demand for services over the air, wireless spectrum is becoming scarce and new techniques are required to boost the number of connected devices within a limited spectral resource to meet the service requirements. This work provides a compressed signal waveform solution, termed fast-orthogonal frequency division multiplexing (Fast-OFDM), to double potentially the number of connected devices by compressing occupied bandwidth of each device without compromising data rate and bit error rate (BER) performance. Simulation is firstly evaluated for the Fast-OFDM with comparisons to single-carrier-frequency division multiple access (SC-FDMA). Results indicate the same performance for both systems in additive white Gaussian noise (AWGN) channel. Experimental measurements are also presented to show the bandwidth saving benefits of Fast-OFDM. It is shown that in a line-of-sight (LOS) scenario, Fast-OFDM has similar performance as SC-FDMA but with 50% bandwidth saving. This research paves the way for extended coverage, enhanced capacity and improved data rate of NB-IoT in 5th generation (5G) new radio (NR) networks. date: 2018-06 date_type: published official_url: https://doi.org/10.1109/JIOT.2018.2825098 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1549675 doi: 10.1109/JIOT.2018.2825098 lyricists_name: Darwazeh, Izzat lyricists_name: Xu, Tongyang lyricists_id: IDARW65 lyricists_id: TXUXX28 actors_name: Flynn, Bernadette actors_id: BFFLY94 actors_role: owner full_text_status: public publication: IEEE Internet of Things Journal volume: 5 number: 3 pagerange: 2120-2129 issn: 2327-4662 citation: Xu, T; Darwazeh, I; (2018) Non-Orthogonal Narrowband Internet of Things: A Design for Saving Bandwidth and Doubling the Number of Connected Devices. IEEE Internet of Things Journal , 5 (3) pp. 2120-2129. 10.1109/JIOT.2018.2825098 <https://doi.org/10.1109/JIOT.2018.2825098>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10047182/7/Darwazeh%20VoR%2008334242.pdf