Hexagonal Quadrature Amplitude Modulation Aided Spatial Modulation

Cogen, Fatih; Aydin, Erdogan

doi:10.23919/eleco47770.2019.8990645

Cited by 7 publications

(10 citation statements)

References 9 publications

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“…It is beneficial in enhancing signal to noise ratio performance over the conventional modulation schemes. Hence, through recent research, it has been concluded that energy efficiency, spectral efficiency and capacity of a MIMO system can be enhanced using spatial modulation technique [107][108][109]. However, although several types of research have incorporated NOMA with spatial modulation [110][111][112], there is limited research available on the energy efficiency which can be additionally attained by mitigating inter-user interference present in spatial modulation.…”

Section: Spatial Shift Keying Modulationmentioning

confidence: 99%

A New Green Prospective of Non-orthogonal Multiple Access (NOMA) for 5G

et al. 2020

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Energy efficiency is a major concern in the emerging mobile cellular wireless networks since massive connectivity is to be expected with high energy requirements from the network operators. Non-orthogonal multiple access (NOMA) being the frontier multiple access scheme for 5G, there exists numerous research attempts on enhancing the energy efficiency of NOMA enabled wireless networks while maintaining its outstanding performance metrics such as high throughput, data rates and capacity maximized optimally.The concept of green NOMA is introduced in a generalized manner to identify the energy efficient NOMA schemes. These schemes will result in an optimal scenario in which the energy generated for communication is managed sustainably. Hence, the effect on the environment, economy, living beings, etc is minimized. The recent research developments are classified for a better understanding of areas which are lacking attention and needs further improvement. Also, the performance comparison of energy efficient, NOMA schemes against conventional NOMA is presented. Finally, challenges and emerging research trends, for energy efficient NOMA are discussed.

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Section: Spatial Shift Keying Modulationmentioning

confidence: 99%

A New Green Prospective of Non-orthogonal Multiple Access (NOMA) for 5G

et al. 2020

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“…From this point forth, it would be wise to use high energy‐efficient constellation schemes for high data‐rates at low energy, such as hexagonal QAM (HQAM) constellation, which is the leading energy‐efficient constellation techniques in communication systems 13 . At the same time, HQAM achieves an order to minimize transmission power when creating constellation symbols and has almost the same system performance as the conventional QAM scheme at high SNR values 14–16 . Due to the energy superiority of HQAM technique over other constellations, it is used by researchers in various applications such as in multicarrier schemes, 17 optical communication systems, 18 physical‐layer network coding, 19 multiple‐antenna techniques 20,21 .…”

Section: Introductionmentioning

confidence: 99%

A new hexagonal quadrature amplitude modulation aided media‐based modulation

Aydin

2021

Int J Communication

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Summary In this paper, a new high‐data rated and energy‐efficient hexagonal quadrature amplitude modulation aided media‐based modulation scheme, called HQAM‐MBM, is proposed for the next‐generation communication systems. In MBM, mirror activation patterns (MAPs) of a reconfigurable antenna have been used to convey extra information in addition to conventional modulated symbols. Therefore, the MBM is seen as a promising index modulation (IM) scheme for the next generation of high‐data rated communication systems. On the other hand, the HQAM constellation scheme is more energy‐efficient than traditional QAM but also has a similar performance at high signal‐to‐noise ratio (SNR) values. Hence, the HQAM technique can appear as a promising energy‐efficient scheme for 5G and beyond networking systems. From this point forth, it has been found appropriate to propose the rational HQAM‐MBM technique, which uses an energy‐efficient HQAM constellation instead of a traditional QAM constellation, and also carries additional information with the indices of the MAPs of a reconfigurable antenna. Besides, it has been shown via computer simulations that the HQAM‐MBM system has lower transmission energy than QAM‐MBM systems. Performance analysis of the HQAM‐MBM scheme is evaluated on Rayleigh fading channels.

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“…Moving from this point, this article deals with hexagonal-QAM (HQAM) constellations that minimize the transmitted power for a given average transmitted symbol power. Studies show that HQAM both performs similarly to traditional QAM constellations and is superior to QAM (sub-optimal, not optimal) in terms of energy efficiency [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The COAS technique is an antenna selection method that shows improvements on the BER and has low complexity, which selects the antennas based on the highest channel amplitudes [12,[17][18][19]. Besides, a technique called HQAM-SM by combining hexagonal constellations and rational SM technique has been proposed by the authors in [9], and this method shows similar BER performances with SM at high signal-tonoise ratio (SNR) values and is energy-efficient.…”

Section: Introductionmentioning

confidence: 99%

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Transmit Antenna Selection for Spatial Modulation Based on Hexagonal Quadrature Amplitude Modulation

Cogen¹,

Aydin²

2021

Journal of Innovative Science and Engineering (JISE)

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There is a tremendous demand from various industries for next-generation 5G networks, which has dramatically increased the need for high data rates and energy efficiency. It is an indisputable fact that next-generation networks should be not only energy-efficient but also resource-efficient. Given the fact that 10% of the current energy consumption in the world is caused by Information and Communication Technology, it is evident that energy-efficiency has become the most crucial performance criteria in the next-generation communication techniques. Based on these needs, we previously suggested the hexagonal quadrature amplitude modulation (HQAM) aided spatial modulation (SM) technique (HQAM-SM) to the literature. In this study, we found it appropriate to do this research to further increase the performance of the HQAM-SM scheme through the antenna selection technique and to investigate the effects of antenna selection technique on HQAM-SM. Moving from this point, in this article, rational capacity-optimized antenna selection (COAS), SM, and energyefficient HQAM techniques are combined, and a new system called COAS-HSM is presented.Hexagonal constellations are to optimize the constellation points to form a hexagonal constellation to minimize the Hamming distance between the constellation points. This layout not only offers better energy efficiency than traditional QAM constellations but also performs almost the same BER performance as QAM at high signal-to-noise ratio (SNR) values. On the other hand, antenna selection algorithms are one of the transmission schemes that have been frequently encountered in the literature in recent years, and that considerably increases the performance of various multiple-input multiple-output (MIMO) communication structures. In particular, the COAS transmission scheme is an intelligent method of selecting transmission antennas over the highest channel amplitudes. Performance analysis of the proposed COAS-HSM technique is carried out in Rayleigh fading channels.

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Hexagonal Quadrature Amplitude Modulation Aided Spatial Modulation

Cited by 7 publications

References 9 publications

A New Green Prospective of Non-orthogonal Multiple Access (NOMA) for 5G

A New Green Prospective of Non-orthogonal Multiple Access (NOMA) for 5G

A new hexagonal quadrature amplitude modulation aided media‐based modulation

Transmit Antenna Selection for Spatial Modulation Based on Hexagonal Quadrature Amplitude Modulation

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