eprintid: 10074265 rev_number: 31 eprint_status: archive userid: 608 dir: disk0/10/07/42/65 datestamp: 2019-05-20 16:10:17 lastmod: 2021-12-27 23:06:59 status_changed: 2020-03-16 20:02:53 type: proceedings_section metadata_visibility: show creators_name: Xu, T creators_name: Liu, F creators_name: Li, A creators_name: Masouros, C creators_name: Darwazeh, I title: Constructive Interference Precoding for Reliable Non-Orthogonal IoT Signaling ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F46 note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Efficient signal waveform design is paving the way to next generation Internet of Things (NG-IoT) communications. Non-orthogonal spectrally efficient frequency division multiplexing (SEFDM) waveform brings bandwidth saving advantages but at the cost of complex signal processing in IoT devices. Power efficiency is the main concern in IoT applications since IoT devices have limited battery life and cannot easily recharge after deployment. Therefore, signal processing in each IoT device should be as simple as possible. Precoding is applied as the strategy at transmitters to pre-cancel the self-created inter carrier interference (ICI) caused by the non-orthogonal sub-carrier packing, and to facilitate low-complexity IoT receivers. However, the typical zero forcing (ZF) precoding results in performance degradation due to the ill-conditioned precoding matrix. To achieve reliable communications using SEFDM signals, a robust constructive interference (CI) precoding method is employed, which constructively converts interference power to useful signal power. Thus, signal-to-noise ratio (SNR) is effectively improved leading to better performance than ZF precoding. This work initially studies the performance of precoding methods in simulation. Furthermore, the CI precoding is practically tested over-the-air on a multi-user multiple input multiple output (MIMO)-SEFDM software defined radio NG-IoT platform. date: 2019-04-29 date_type: published publisher: Institute of Electrical and Electronics Engineers official_url: https://doi.org/10.1109/INFCOMW.2019.8845151 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1658010 doi: 10.1109/INFCOMW.2019.8845151 lyricists_name: Darwazeh, Izzat lyricists_name: Liu, Fan lyricists_name: Masouros, Christos lyricists_name: Xu, Tongyang lyricists_id: IDARW65 lyricists_id: FLIUX37 lyricists_id: CMASO14 lyricists_id: TXUXX28 actors_name: Xu, Tongyang actors_id: TXUXX28 actors_role: owner full_text_status: public publication: IEEE Infocom place_of_pub: Paris, France. event_title: IEEE INFOCOM event_location: Paris event_dates: 29 April 2019 - 02 May 2019 institution: IEEE INFOCOM isbn: 978-1-7281-1878-9 issn: 0743-166X book_title: Proceedings of IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) citation: Xu, T; Liu, F; Li, A; Masouros, C; Darwazeh, I; (2019) Constructive Interference Precoding for Reliable Non-Orthogonal IoT Signaling. In: Proceedings of IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS). Institute of Electrical and Electronics Engineers: Paris, France.. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10074265/7/Masouros_Constructive%20Interference%20Precoding%20for%20Reliable%20Non-Orthogonal%20IoT%20Signaling_AAM.pdf