Enhanced Orthogonal Frequency-Division Multiplexing with Subcarrier Number Modulation
KAUST DepartmentComputer Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Online Publication Date2019-04-30
Print Publication Date2019
Permanent link to this recordhttp://hdl.handle.net/10754/644885
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AbstractA novel modulation scheme termed orthogonal frequency-division multiplexing with subcarrier number modulation (OFDM-SNM) has been proposed and regarded as one of the promising candidate modulation schemes for next generation networks. Although OFDM-SNM is capable of having a higher spectral efficiency (SE) than OFDM with index modulation (OFDM-IM) and plain OFDM under certain conditions, its reliability is relatively inferior to these existing schemes, because the number of active subcarriers varies. In this regard, we propose an enhanced OFDM-SNM scheme in this paper, which utilizes the flexibility of placing subcarriers to harvest a coding gain in the high signal-to-noise ratio (SNR) region. In particular, we stipulate a methodology that optimizes the subcarrier activation pattern (SAP) by subcarrier assignment using instantaneous channel state information (CSI) and therefore the subcarriers with higher channel power gains will be granted the priority to be activated, given the number of subcarriers is fixed. We also analyze the proposed enhanced OFDM-SNM system in terms of outage and error performance. The average outage probability and block error rate (BLER) are derived and approximated in closed-form expressions, which are further verified by numerical results generated by Monte Carlo simulations. The high-reliability nature of the enhanced OFDM-SNM makes it a promising candidate for implementing in the Internet of Things (IoT) with stationary machine-type devices (MTDs), which are subject to slow fading and supported by proper power supply.
CitationDang S, Ma G, Shihada B, Alouini M-S (2019) Enhanced Orthogonal Frequency-Division Multiplexing with Subcarrier Number Modulation. IEEE Internet of Things Journal: 1–1. Available: http://dx.doi.org/10.1109/JIOT.2019.2914175.
SponsorsWe thank the editor and the anonymous reviewers for their constructive comments, which have helped us improve the quality of the paper. We also appreciate the discussion with Dr. Jehad M. Hamamreh and Mr. Ahmad M. Jaradat with Istanbul Medipol University via emails.
JournalIEEE Internet of Things Journal