OFDM With Hybrid Number and Index Modulation

Jaradat, Ahmad; Hamamreh, Jehad M.; Arslan, Hüseyin

doi:10.1109/access.2020.2982088

Cited by 37 publications

(27 citation statements)

References 48 publications

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“…Unlike OFDM-IM [18], [22], and the recently introduced hybrid OFDM-IM with subcarrier number modulation (OFDM-HNIM) [40], the index shift keying (ISK) concept is exploited in the proposed FQSISK, where all possible combinations of the active and non-active subcarriers are exploited along with the proposed DV constellation to transmit more data. Hence, it achieves higher SE than its OFDM-IM counterparts.…”

Section: Proposed Fqsisk-ofdm System Modelmentioning

confidence: 99%

Fully Quadrature Subcarrier-Index Shift Keying for Efficient Underwater Acoustic Communications

et al. 2021

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A novel fully quadrature subcarrier-index shift keying orthogonal frequency division multiplexing (FQSISK-OFDM) modulation scheme for underwater acoustic communications (UWAC) is proposed in this paper. In the FQSISK, the data is conveyed by active and non-active OFDM-subcarriers indices. Moreover, the active odd and even subcarriers are marked with separable predefined dummy variables (DV). Herein, the DV ±δ (i.e., it can take any predefined value), and its quadrature ±jδ are exploited to distinguish between active even and odd subcarriers. Hence, the possibility of power leakage from active to non-active subcarriers is reduced, which minimizes the effect of severe UWAC intercarrier-interface (ICI). Moreover, the spectral efficiency of the FQSISK hardly depends on the subcarriers grouping size, which reduces the proposed FQSISK decoder complexity significantly. The simulation results demonstrate the proposed FQSISK superiority, as it achieves higher spectral and energy efficiencies than the plain OFDM and the recently introduced OFDM index modulation (OFDM-IM) techniques. INDEX TERMS OFDM with index modulation (OFDM-IM), underwater acoustic communications, quadrature shift keying, subcarrier-shift keying.

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Section: Proposed Fqsisk-ofdm System Modelmentioning

confidence: 99%

Fully Quadrature Subcarrier-Index Shift Keying for Efficient Underwater Acoustic Communications

et al. 2021

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“…As stated by [16], [17], a single antenna channel is represented by overlaying a set of complex sinusoids in popular multipath fading models.…”

Section: A Parametric Predictor Modelmentioning

confidence: 99%

Massive MIMO Channel Prediction Using Recurrent Neural Networks

Lemayian

Hamamreh

2020

RS Open Journal on Innovative Communication Technologies

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“…This computing disadvantage could degrade the applicability of OFDM-SNM in practice for delay-critical wireless applications and/or real-time data services. In theoretic studies, maximum-likelihood (ML) detection is employed to detect the subcarrier number pattern (SNP) together with the carried constellation symbols on the active subcarriers as a whole, which leads to the optimal detection performance, while resulting in exponentially high detection complexity [10]. To reduce the detection complexity, several low-complexity detection schemes have been proposed for OFDM-SNM and its alternatives [10].…”

Section: Introductionmentioning

confidence: 99%