Space-frequency block code for MIMO-OFDM communication systems with reconfigurable antennas

Vakilian, Vida; Frigon, Jean-François; Roy, S.

doi:10.1109/glocom.2013.6831736

Cited by 13 publications

(12 citation statements)

References 22 publications

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“…2 shows the results at delay spread of τ = 5µs. The performance improving compared to [13], [14] and [5] is shown in the figure above.…”

Section: Resultsmentioning

confidence: 91%

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A Novel MIMO - OFDM Technique for Improving Wireless Communications System Performance based on SF–BC

Ramadhan¹

2015

IJCA

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In this work, the author implemented a NOVEL technique of multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) based on space frequencyblock coding (SF-BC). Where, the implemented code is designed based on the QOC using the techniques of the reconfigurable antennas. The proposed system is implemented using MATLAB program, and the results showing best performance of a wireless communications system of higher coding gain and diversity.

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“…2 shows the results at delay spread of τ = 5µs. The performance improving compared to [13], [14] and [5] is shown in the figure above.…”

Section: Resultsmentioning

confidence: 91%

“…Therefor, the performance of the wireless systems can improve by using the reconfigurable antennas and designing a proper code [5].…”

Section: Introductionmentioning

confidence: 99%

A Novel MIMO - OFDM Technique for Improving Wireless Communications System Performance based on SF–BC

Ramadhan¹

2015

IJCA

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“…The third methodology offers reconfigurable MEMS integrated antennas for mmWave frequencies. The MEMS-based reconfigurable antennas have been widely studied in sub-6 GHz systems [26]- [29]. In [27], the diversity gain of traditional MIMO systems are improved through the application of reconfigurable antennas at the receiver and space-time block codes (STBCs).…”

Section: Introductionmentioning

confidence: 99%

mmWave Lens-Based MIMO System for Suppressing Small-Scale Fading and Shadowing

Almasi

Amiri

Jafarkhani

et al. 2020

IEEE Trans. Wireless Commun.

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In this paper, we propose a generalized millimeter-Wave (mmWave) reconfigurable antenna multiple-input multipleoutput (RA-MIMO) architecture that takes advantage of lens antennas. The considered antennas can generate multiple independent beams simultaneously using a single RF chain. This property, together with RA-MIMO, is used to combat smallscale fading and shadowing in mmWave bands. To this end, first, we derive a channel matrix for RA-MIMO. Then, we use rate-one space-time block codes (STBCs), together with phaseshifters at the receive reconfigurable antennas, to suppress the effect of small-scale fading. We consider two kinds of phase shifters: i) ideal which is error-free and ii) digital which adds quantization error. The goal of phase-shifters is to convert a complex-valued channel matrix into real-valued. Hence, it is possible to use rate-one STBCs for any dimension of RA-MIMO. We investigate diversity gain and derive an upper bound for symbol error rate in cases of ideal and digital phase-shifters. We show that RA-MIMO achieves the full-diversity gain with ideal phase-shifters and the full-diversity gain for digital phaseshifters when the number of quantization bits is higher than one. We investigate RA-MIMO in the presence of shadowing. Our analysis demonstrates that, by increasing the dimension of RA-MIMO, the outage probability decreases which means the effect of shadowing decreases. Numerical results verify our theoretical derivations.

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“…Subsequently, the technique in [17] is extended to a system with reconfigurable antennas at both the transmitter and receiver sides in [18]. Later, a coding scheme was proposed for reconfigurable antenna MIMO systems over frequency-selective fading channels in [19]. However, unlike the work in this paper, the main goal in [17]- [19] is to use the degrees of freedom provided by reconfigurable antennas to enhance the diversity order of the system.…”

Section: Introductionmentioning

confidence: 99%

“…However, unlike the work in this paper, the main goal in [17]- [19] is to use the degrees of freedom provided by reconfigurable antennas to enhance the diversity order of the system. Hence, the designs in [17]- [19], in no way address the propagation issues specific to mmWave MIMO systems, namely the channel sparsity.…”

Section: Introductionmentioning

confidence: 99%

A New Reconfigurable Antenna MIMO Architecture for mmWave Communication

Almasi

Mehrpouyan

Vakilian

et al. 2018

2018 IEEE International Conference on Communications (ICC)

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The large spectrum available in the millimeter-Wave (mmWave) band has emerged as a promising solution for meeting the huge capacity requirements of the 5th generation (5G) wireless networks. However, to fully harness the potential of mmWave communications, obstacles such as severe path loss, channel sparsity and hardware complexity should be overcome. In this paper, we introduce a generalized reconfigurable antenna multiple-input multiple-output (MIMO) architecture that takes advantage of lens-based reconfigurable antennas. The considered antennas can support multiple radiation patterns simultaneously by using a single RF chain. The degrees of freedom provided by the reconfigurable antennas are used to, first, combat channel sparsity in MIMO mmWave systems. Further, to suppress high path loss and shadowing at mmWave frequencies, we use a rateone space-time block code. Our analysis and simulations show that the proposed reconfigurable MIMO architecture achieves full-diversity gain by using linear receivers and without requiring channel state information at the transmitter. Moreover, simulations show that the proposed architecture outperforms traditional MIMO transmission schemes in mmWave channel settings.

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Space-frequency block code for MIMO-OFDM communication systems with reconfigurable antennas

Cited by 13 publications

References 22 publications

A Novel MIMO - OFDM Technique for Improving Wireless Communications System Performance based on SF–BC

A Novel MIMO - OFDM Technique for Improving Wireless Communications System Performance based on SF–BC

mmWave Lens-Based MIMO System for Suppressing Small-Scale Fading and Shadowing

A New Reconfigurable Antenna MIMO Architecture for mmWave Communication

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