Adaptive Quadrature Spatial Modulation

Oladoyinbo, S.; Pillay, Narushan; Xu, Hongjun

doi:10.1080/02564602.2019.1677517

Cited by 4 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This section presents simulation results for the GCW-GSM system with different numbers of transmit antennas and comparisons with C-SM, C-GSM, C-QSM, GQSM-AG, and MIMO-GSM. The theoretical ABEP for C-SM schemes was based on (9) in Naidoo et al, 15 that of GSM-CR was on (A.6) in Naidoo et al, 20 and that of C-GSM schemes was based on (5) in Pillay et al 18 The theoretical ABEP of C-QSM was based on (3) and (4) in Oladoyinbo et al, 21 that of GQSM-AG was based on (10) in Castillo-Soria et al, 17 and that of MIMO-GSM was based on Wang et al 9 and on (5) in Pillay et al 18 Another aim of this section is to validate the theoretical performance bound derived in 4. The ABER performance of these systems was evaluated using Monte Carlo simulations over i. with AWGN.…”

Section: Simulation Resultsmentioning

confidence: 99%

Golden codeword‐based generalized spatial modulation

Sibanda

Pillay

2022

Int J Communication

View full text Add to dashboard Cite

Conventional-generalized spatial modulation (C-GSM) is an N T Â N R multipleinput multiple-output (MIMO) spatial modulation (SM) scheme that transmits the same complex amplitude/phase modulation symbol from multiple active transmit antennas. By using two active transmit antennas during a transmission interval, C-GSM is capable of achieving high spectral efficiencies. However, as the size of the signal constellation/domain increases, the minimum Euclidean distances (ED) between the symbols decrease. Hence, this leads to a degradation of the average bit error rate (ABER) performance of the scheme.Hence, motivated to improve the error performance of C-GSM schemes, first, this study proposes a new scheme called Golden codeword-based generalized spatial modulation (GCW-GSM), which combines C-GSM and the Golden code to take advantage of the benefits of both while avoiding their drawbacks. The proposed scheme uses conventional quadrature amplitude modulation (C-QAM), and it is investigated over Rayleigh frequency-flat fading channels with additive white Gaussian noise. Second, a closed-form expression of the theoretical average bit error probability of the proposed GCW-GSM scheme is formulated. Compared to simulation results, it proves to be increasingly tight at high signal-to-noise ratio values. Finally, the proposed scheme performance over the Rayleigh-frequency-flat fading channel is compared to that over the Rician channel. An improvement in the error performance of 6 dB with spectral efficiency of 10 bits=s=Hz is seen in 4 Â 4 C-16QAM GCW-GSM over 4 Â 4 C-256QAM conventional-spatial modulation and 4 Â 4 C-256QAM C-GSM schemes at a bit error rate (BER) of 1 Â 10 À5 . The 4 Â 4 C-16QAM GCW-GSM scheme exhibits an improvement in the error performance of 2:9 dB with spectral efficiency of 10 bits=s=Hz over the 4 Â 4 C-64QAM conventional quadrature spatial modulation scheme at a BER of 1 Â 10 À5 . Finally, the 4 Â 4 16-QAM GCW-GSM under Rayleigh fading has a performance gain of 3 dB over 4 Â 4 16-QAM GCW-GSM under Rician fading with a Rician K factor of 3.

show abstract

Section: Simulation Resultsmentioning

confidence: 99%

Golden codeword‐based generalized spatial modulation

Sibanda

Pillay

2022

Int J Communication

View full text Add to dashboard Cite

show abstract

“…The theoretical ABEP for C-SM schemes was based on (9) in Naidoo et al 4 , that of C-GSM schemes was based on (5) in Pillay et al 19 , and that of ESE-GSM was based on (5) and (12) in Pillay et al 19 . The theoretical ABEP of C-QSM was based on (3) and (4) in Oladoyinbo et al 8 , and that of MIMO-GSM was based on (16) in Wang et al 21 . Another aim of this section is to validate the theoretical performance bound derived in ( 4 ).…”

Section: Simulation and Numerical Results Analysismentioning

confidence: 99%

“…The I components are modulated into cosine carriers and Q components are modulated into sine carriers, respectively. Hence with that, C-QSM eliminates ICI , thereby enhancing the EP of SM systems 8 . Additionally, C-QSM enhances the SE ( ) by bits / s / Hz compared to the C-SM, which achieves bits / s / Hz ; where M is the amplitude/phase modulation order 6 .…”

Section: Introductionmentioning

confidence: 93%

“…The split symbols are then transmitted by generalized combinations of the I and Q domain antennas like in C-QSM. This helps with eliminating ICI and thereby further enhancing the EP of the proposed scheme, since the I and Q components of the C-QSM scheme are modulated into cosine and sine carriers 8 . Thus, the main core contributions of this paper are: Proposal of a new GQSM scheme called GSM with H-QAM (GQSM-H-8QAM), that improves the EP of GCQSM systems by equipping them with rotated H-8QAM.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Sibanda

Pillay

2022

Sci Rep

View full text Add to dashboard Cite

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.

show abstract

“…Therefore, researches recently proposes new technologies that enhance or even flips the traditional way of implementing communication systems. As an example, exploiting other dimensions such as spatial domain [6][7][8][9][10]. Since the application of OFDM (orthogonal frequency division multiplexing) technique, wireless transceivers perform much better than traditional transceiver systems because of multicarrier over single carrier advances.…”

Section: Introductionmentioning

confidence: 99%

A simplified spatial Modulation MISO-OFDM scheme

Al-Doori

Al-Hemiary

2020

TELKOMNIKA

View full text Add to dashboard Cite

Index modulation is one of the promising techniques for future communications systems due to many improvement over the classical orthogonal frequency division multiplexing systems such as single RF chain, increased throughput for the same modulation order, achieved tradeoff between the efficiencies of the power and the spectral, and elimination of inter-channel interference. Many forms of index modulation researches exist where symbols are conveyed in antennas, subcarriers, time slots, and the space-time matrix. Spatial modulation is one member of index modulation family where symbols are conveyed in activating transmit/receive antennas. In this paper, a modification to a standard multiple input single output scheme by integrating spatial modulation using simplified mathematical procedure is achieved. In the transmitter side, data and activation symbols are distributed simultaneously using mathematical module and floor functions. At the receiver, a simplified maximum likelihood detector is used to obtain transmitted pair of symbols. To verify this, MATLAB simulink is used to simulate a downlink system where spatial modulation is applied to a base station. Results for different transmit antenna number and modulation order are obtained in the form of bit error rate versus signal to noise ratio.

show abstract

Adaptive Quadrature Spatial Modulation

Cited by 4 publications

References 20 publications

Golden codeword‐based generalized spatial modulation

Golden codeword‐based generalized spatial modulation

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

A simplified spatial Modulation MISO-OFDM scheme

Contact Info

Product

Resources

About