Fully generalised spatial modulation technique for underwater communication

Hussein, Hany S.; Esmaiel, Hamada; Jiang, Danchi

doi:10.1049/el.2018.0948

Cited by 24 publications

(50 citation statements)

References 5 publications

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“…Based on the GSM scheme, the FGSM has been proposed [15,16]. In the FGSM, a block of transmitted bit instants is divided into two different groups, namely data bits and spatial bits.…”

Section: Fully Generalized Spatial Modulationmentioning

confidence: 99%

“…Changing the number of active transmit antennas in the antenna subsets improves the understanding of the communication channel, simplifies the procedure of differentiating between the channel's multiple paths, and mitigates the weakness in the performance of BER. Hence, the FGSM available data rate can be expressed as follows [15,16]:…”

Section: Fully Generalized Spatial Modulationmentioning

confidence: 99%

“…Recently, the FGSM [15] and EFGSM [39] have been proposed to the UWA channel to improve the energy loss of the underwater sensor network. The transmission vector of the SMTs-MIMO is transmitted over underwater time-varying MIMO channel with an AWGN.…”

Section: Optimal Detectormentioning

confidence: 99%

“…Therefore, SM has less receiver complexity, it effectively removes ICI, and it does not require IAS of the MIMO link due to availability of one RF chain at the transmitter. Different SMTs are introduced [10,[15][16][17][18][19][20][21][22][23] by allowing it to enable one or more RF chains using different techniques so that high throughput and enhanced SNR can be achieved. GSM [21,22] is the most prevalent technique, in which the multiple antennas are active in each communication channel so that high data rate can be achieved.…”

Section: Introductionmentioning

confidence: 99%

“…FGSM has been proposed in [15,16] where the antenna subsets are varying between the activation of a single antenna and the activation of multiple/all antennas. These variations in the number of activated transmission antennas enhance the realization of the communication channel, resulting in increased available data rate.…”

Section: Introductionmentioning

confidence: 99%

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Pilot-Based Adaptive Channel Estimation for Underwater Spatial Modulation Technologies

et al. 2019

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Spatial Modulation Technologies (SMTs) are schemes that reduce inter-carrier interference (ICI), inter-channel interference, inter-antenna synchronization (IAS), and system complexity for multiple-input multiple-output (MIMO) communication systems. Moreover, high spectral and energy efficiency have rendered SMTs attractive to underwater acoustic (UWA) MIMO communication systems. Consequently, this paper focuses on SMTs such as spatial modulation (SM), generalized spatial modulation (GSM), and fully generalized spatial modulation (FGSM) in which one constant number and one multiple number of antennas are active to transmit data symbols in any time interval for underwater acoustic communication (UWAC). In SMTs, the receiver requires perfect channel state information (P-CSI) for accurate data detection. However, it is impractical that the perfect channel knowledge is available at the receiver. Therefore, channel estimation is of critical importance to obtain the CSI. This paper proposes the pilot-based recursive least-square (RLS) adaptive channel estimation method over the underwater time-varying MIMO channel. Furthermore, maximum likelihood (ML) decoder is used to detect the transmitted data and antennas indices from the received signal and the estimated UWA-MIMO channel. The numerical computation of mean square error (MSE) and bit error rate (BER) performance are computed for different SMTs like SM, GSM and FSGM using Monte Carlo iterations. Simulation results demonstrate that the RLS channel estimation method achieves the nearly same BER performance as P-CSI.

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“…Based on the GSM scheme, the FGSM has been proposed [15,16]. In the FGSM, a block of transmitted bit instants is divided into two different groups, namely data bits and spatial bits.…”

Section: Fully Generalized Spatial Modulationmentioning

confidence: 99%

Section: Fully Generalized Spatial Modulationmentioning

confidence: 99%

Section: Optimal Detectormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pilot-Based Adaptive Channel Estimation for Underwater Spatial Modulation Technologies

et al. 2019

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Improved error performance for generalised spatial modulation with enhanced spectral efficiency

Pillay

2019

Int J Communication

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SummaryThe existing analytical average bit error rate (ABER) expression of conventional generalised spatial modulation (CGSM) does not agree well with the Monte Carlo simulation results in the low signal‐to‐noise ratio (SNR) region. Hence, the first contribution of this paper is to derive a new and easy way to evaluate analytical ABER expression that improves the validation of the simulation results at low SNRs. Secondly, a novel system termed CGSM with enhanced spectral efficiency (CGSM‐ESE) is presented. This system is realised by applying a rotation angle to one of the two active transmit antennas. As a result, the overall spectral efficiency is increased by 1 bit/s/Hz when compared with the equivalent CGSM system. In order to validate the simulation results of CGSM‐ESE, the third contribution is to derive an analytical ABER expression. Finally, to improve the ABER performance of CGSM‐ESE, three link adaptation algorithms are developed. By assuming full knowledge of the channel at the receiver, the proposed algorithms select a subset of channel gain vector (CGV) pairs based on the Euclidean distance between all CGV pairs, CGV splitting, CGV amplitudes, or a combination of these.

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Enhanced redesigned spatial modulation: Design and performance evaluation under correlated fading channels

Gudla

Kumaravelu

2020

Int J Communication

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Summary Spatial modulation techniques (SMTs) have emerged as promising multiple‐input and multiple‐output (MIMO) technology for fifth generation (5G) networks, which can achieve an appealing trade‐off between conflicting design objectives such as reliability, hardware cost, complexity, spectral efficiency, and energy efficiency. Most of the SMTs suffer from significant performance deterioration under correlated fading channels. In this paper, a novel spectral efficient SMT referred as enhanced redesigned spatial modulation (EReSM) is proposed, which is robust against adverse channel correlation effects. At any time instant, EReSM activates either one or two transmit antennas and employs a robust bits to antenna index mapping that ensures the selection of antenna subsets with maximum spatial separation to mitigate the effect of spatial correlation. EReSM also exploits phase rotation of transmitted symbols as an additional dimension to convey an extra information bit. The rotation angles used for bit mapping are optimized for various modulation schemes to maximize the minimum euclidean distance between the symbols. To analyze the performance, analytical upper bound expression for average bit error probability (ABEP) is derived for both uncorrelated and spatially correlated channel conditions. Monte Carlo simulation results substantiate the accuracy of the analytical results and also demonstrate that the proposed EReSM outperform conventional redesigned spatial modulation (ReSM) by at least 4 dB.

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Fully generalised spatial modulation technique for underwater communication

Cited by 24 publications

References 5 publications

Pilot-Based Adaptive Channel Estimation for Underwater Spatial Modulation Technologies

Pilot-Based Adaptive Channel Estimation for Underwater Spatial Modulation Technologies

Improved error performance for generalised spatial modulation with enhanced spectral efficiency

Enhanced redesigned spatial modulation: Design and performance evaluation under correlated fading channels

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