On the performance of improved quadrature spatial modulation

Holoubi, Tasnim; Murtala, Sheriff; Muchena, Nishal; Mohaisen, Manar

doi:10.4218/etrij.2019-0431

Cited by 6 publications

(6 citation statements)

References 33 publications

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“…The CCA of the GQSM-H-8QAM scheme is similar to that discussed in Holoubi et al 20 . It is based on real value multiplications and additions.…”

Section: Mld Cca Of the Proposed Gqsm-h-8qam Scheme-based On Real Val...mentioning

confidence: 57%

“…It is based on real value multiplications and additions. In 20 , it is given as . In this section, all the incorporated CCA s of various schemes in this paper (including enhanced spectral efficiency GSM (ESE-GSM), GSM multiplexing two symbols(MIMO-GSM) and constellation reassigned GSM (GSM-CR)), have been discussed before in 6 and 21 .…”

Section: Mld Cca Of the Proposed Gqsm-h-8qam Scheme-based On Real Val...mentioning

confidence: 99%

“…Hence, taking the Taylor series of ( 6 ) and using the same approach as 6 and 20 at high SNR s, ( 6 ) leads to ( 7 ) when higher-order terms are neglected. …”

Section: Proposed Error Performance Analysis Of Gqsm-h-8qammentioning

confidence: 99%

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Error performance analysis of generalized quadrature spatial modulation using H-8QAM

Sibanda

Pillay

2022

Sci Rep

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Motivated to enhance the error performance (EP) of generalised complex quadrature spatial modulation (GCQSM) systems, this study proposes a scheme that builds on GCQSM and uses hexagonal quadrature amplitude modulation (H-QAM) constellations which have the advantages of a maximised Euclidean distance with relatively low peak-to-average power ratio, compared to conventional QAM (C-QAM) systems. This in turn, leads to an enhancement of the EP of GCQSM schemes. The proposed scheme utilises a rotated hexagonal 8QAM (H-8QAM) set. Thus, the proposed scheme is herein named; Generalised QSM using H-8QAM (GQSM-H-8QAM). In this study, the EP of the proposed GQSM-H-8QAM scheme is investigated over Rayleigh frequency flat-fading channels with additive white Gaussian noise. Additionally, a theoretical average bit error probability (ABEP) expression of the GQSM-H-8QAM scheme is formulated and validated using Monte Carlo simulations. Compared to simulation results, the ABEP proves to be increasingly tight at high signal-to-noise ratio values. Obtained simulation results also show an improvement in the EP of the GQSM-H-8QAM scheme over various SM schemes like GCQSM, C-QSM and conventional-generalized spatial modulation (C-GSM), at the same spectral efficiency (SE). An improvement in the EP of 0.61 dB with SE of 8 bits/s/Hz is seen in $$4\times 4$$ 4 × 4 GQSM-H-8QAM over $$4\times 4$$ 4 × 4 GCQSM using C-8QAM, 2.58 dB over $$4\times 4$$ 4 × 4 C-QSM-C-64QAM and a gain of 4.85 dB over $$4\times 4$$ 4 × 4 C-GSM-C-64QAM.

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“…The CCA of the GQSM-H-8QAM scheme is similar to that discussed in Holoubi et al 20 . It is based on real value multiplications and additions.…”

Section: Mld Cca Of the Proposed Gqsm-h-8qam Scheme-based On Real Val...mentioning

confidence: 57%

Section: Mld Cca Of the Proposed Gqsm-h-8qam Scheme-based On Real Val...mentioning

confidence: 99%

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Error performance analysis of generalized quadrature spatial modulation using H-8QAM

Sibanda

Pillay

2022

Sci Rep

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“…An improved version of QSM is called “improved QSM (IQSM)”, 22 proposed to enhance the SE of QSM by sending constellation symbol over

\mathcal{I}

and

𝒬

dimensions in one symbol duration. In Reference 23, the authors derived an upper bound for the BER of the IQSM. “Double SM (DSM)” 24 was proposed to increase the SE of the SM.…”

Section: Introductionmentioning

confidence: 99%

Performance of modified generalized quadrature spatial modulation over correlated fading channels with imperfect channel information

Gunde

Anuradha

2022

Trans Emerging Tel Tech

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A generalized version of the quadrature spatial modulation (QSM) scheme is called a modified generalized QSM (mGQSM), which is proposed to enhance the spectral efficiency of QSM by considering multiple radio frequency chains. In QSM, the in-phase and quadrature dimensions are used to transmit the data symbols. Using the QSM transmission principle, the mGQSM scheme can transmit the data symbols on different antennas ranging from N C to 2N C . Moreover, the proposed scheme provides an additional one bit data rate when compared to generalized QSM (GQSM). This paper presents the performance of mGQSM under imperfect channel conditions over correlated Rayleigh, Rician, and Nakagami-m fading channels. For the computer simulations, we assume 𝛽 = 0.7 and various fading parameters for the Rician and Nakagami channels. The error performances of the mGQSM, GQSM, and QSM schemes are evaluated using the maximum-likelihood (ML) detector. Under imperfect channel conditions, the mGQSM and QSM schemes are examined and compared. Furthermore, a low complexity ordered block minimum mean-squared error (OB-MMSE) detector is employed for the reduced-codebook mGQSM (RC-mGQSM), which achieves near-ML performance with reduced complexity.

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“…Improved QSM (IQSM) exploits the in-phase and quadrature spatial dimensions to transmit the real and imaginary parts of two signal symbols, respectively, using combinations of two antennas [ 27 ]. The authors in Reference [ 28 ] investigate the constellation design of the IQSM and propose double QSM (DQSM) and parallel IQSM (PIQSM) that reduce the number of transmit antennas of the IQSM without additional hardware requirements. In addition to the information carried by the indices of the antennas used for transmission, the enhanced SM (ESM) conveys information through the constellation used to transmit either one or two signal symbols per channel use [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Constellation Design for the Parallel Quadrature Spatial Modulation

Mohaisen

Holoubi

Abuhmed

2020

Entropy

Self Cite

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Spatial modulation (SM) is a multiple-input multiple-output (MIMO) technique that achieves a MIMO capacity by conveying information through antenna indices, while keeping the transmitter as simple as that of a single-input system. Quadrature SM (QSM) expands the spatial dimension of the SM into in-phase and quadrature dimensions, which are used to transmit the real and imaginary parts of a signal symbol, respectively. A parallel QSM (PQSM) was recently proposed to achieve more gain in the spectral efficiency. In PQSM, transmit antennas are split into parallel groups, where QSM is performed independently in each group using the same signal symbol. In this paper, we analytically model the asymptotic pairwise error probability of the PQSM. Accordingly, the constellation design for the PQSM is formulated as an optimization problem of the sum of multivariate functions. We provide the proposed constellations for several values of constellation size, number of transmit antennas, and number of receive antennas. The simulation results show that the proposed constellation outperforms the phase-shift keying (PSK) constellation by more than 10 dB and outperforms the quadrature-amplitude modulation (QAM) schemes by approximately 5 dB for large constellations and number of transmit antennas.

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On the performance of improved quadrature spatial modulation

Cited by 6 publications

References 33 publications

Error performance analysis of generalized quadrature spatial modulation using H-8QAM

Error performance analysis of generalized quadrature spatial modulation using H-8QAM

Performance of modified generalized quadrature spatial modulation over correlated fading channels with imperfect channel information

Performance Analysis and Constellation Design for the Parallel Quadrature Spatial Modulation

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