High rate space-time codes for millimeter-wave systems with reconfigurable antennas

Vakilian, Vida; Mehrpouyan, Hani; Hua, Yingbo

doi:10.1109/wcnc.2015.7127536

Cited by 5 publications

(13 citation statements)

References 30 publications

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“…We assume that a limited feedback from the receiver to the transmitter is available for the reconfiguration state selection and transmit beam selection, which will be detailed later in Section III-B. We would like to point out that the assumption of full CSI at the receiver or even at both the transmitter and the receiver has often been adopted in the existing papers on mmWave systems and reconfigurable antennas, see, e.g., [12,15,17,25,26,[34][35][36][37][38]. On the other hand, it is worth mentioning that the full CSI assumption is not easy to achieve in practice.…”

Section: System Modelmentioning

confidence: 99%

“…The VCR of H ψ in (3) is given by [41,42] 1 The existing studies on the 2×2 mmWave MIMO with reconfigurable antennas used the idealized assumption of full-rank channel matrices with i.i.d. complex Gaussian entries for all reconfiguration states, which is not practical for the general mmWave scenarios where the number of antennas is relatively large [25,26].…”

Section: ) Virtual Channel Representation (Vcr)mentioning

confidence: 99%

“…where R out ψ and R out ψ are given in (25) and (26), respectively. The outage throughput gain of employing the reconfigurable antennas is given in the following proposition.…”

Section: B Outage Throughput Gainmentioning

confidence: 99%

“…More recently, reconfigurable antennas for communications at mmWave frequencies have been designed and realized, e.g., [22] at 20.7-36 GHz, [23] at 92.6-99.3 GHz, and [24] at [28][29][30][31][32][33][34][35][36][37][38] GHz. The design of space-time codes for a 2 × 2 mmWave MIMO with reconfigurable transmit antennas was investigated in [25] and [26], and the achieved diversity gain and coding gain were demonstrated. Due to the simple structure of a 2×2 MIMO, neither the important sparse nature of mmWave channels nor the transceivers with low-complexity beamforming were considered in [25] and [26].…”

Section: Introductionmentioning

confidence: 99%

“…The design of space-time codes for a 2 × 2 mmWave MIMO with reconfigurable transmit antennas was investigated in [25] and [26], and the achieved diversity gain and coding gain were demonstrated. Due to the simple structure of a 2×2 MIMO, neither the important sparse nature of mmWave channels nor the transceivers with low-complexity beamforming were considered in [25] and [26].…”

Section: Introductionmentioning

confidence: 99%

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Low-Complexity Reconfigurable MIMO for Millimeter Wave Communications

Jafarkhani

2018

IEEE Trans. Commun.

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The performance of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems is limited by the sparse nature of propagation channels and the restricted number of radio frequency chains at transceivers. The introduction of reconfigurable antennas offers an additional degree of freedom on designing mmWave MIMO systems. This paper provides a theoretical framework for studying the mmWave MIMO with reconfigurable antennas. Based on the virtual channel model, we present an architecture of reconfigurable mmWave MIMO with beamspace hybrid analog-digital beamformers and reconfigurable antennas at both the transmitter and the receiver. We show that employing reconfigurable antennas can provide throughput gain for the mmWave MIMO. We derive the expression for the average throughput gain of using reconfigurable antennas in the system, and further derive the expression for the outage throughput gain for the scenarios where the channels are (quasi) static. Moreover, we propose a low-complexity algorithm for reconfiguration state selection and beam selection. Our numerical results verify the derived expressions for the throughput gains and demonstrate the near-optimal throughput performance of the proposed low-complexity algorithm.Index Terms-Reconfigurable antennas, millimeter wave, sparse channels, virtual channel model, throughput gain.

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Section: System Modelmentioning

confidence: 99%

Section: ) Virtual Channel Representation (Vcr)mentioning

confidence: 99%

“…where R out ψ and R out ψ are given in (25) and (26), respectively. The outage throughput gain of employing the reconfigurable antennas is given in the following proposition.…”

Section: B Outage Throughput Gainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low-Complexity Reconfigurable MIMO for Millimeter Wave Communications

Jafarkhani

2018

IEEE Trans. Commun.

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Millimeter Wave Communications with Reconfigurable Antennas

Jafarkhani

2018

2018 IEEE International Conference on Communications (ICC)

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The highly sparse nature of propagation channels and the restricted use of radio frequency (RF) chains at transceivers limit the performance of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems. Introducing reconfigurable antennas to mmWave can offer an additional degree of freedom on designing mmWave MIMO systems. This paper provides a theoretical framework for studying the mmWave MIMO with reconfigurable antennas. We present an architecture of reconfigurable mmWave MIMO with beamspace hybrid analog-digital beamformers and reconfigurable antennas at both the transmitter and the receiver. We show that employing reconfigurable antennas can provide throughput gain for the mmWave MIMO. We derive the expression for the average throughput gain of using reconfigurable antennas, and further simplify the expression by considering the case of large number of reconfiguration states. In addition, we propose a low-complexity algorithm for the reconfiguration state and beam selection, which achieves nearly the same throughput performance as the optimal selection of reconfiguration state and beams by exhaustive search.

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Channel Estimation Method and Phase Shift Design for Reconfigurable Intelligent Surface Assisted MIMO Networks

Mirza

Ali

2021

IEEE Trans. Cogn. Commun. Netw.

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High rate space-time codes for millimeter-wave systems with reconfigurable antennas

Cited by 5 publications

References 30 publications

Low-Complexity Reconfigurable MIMO for Millimeter Wave Communications

Low-Complexity Reconfigurable MIMO for Millimeter Wave Communications

Millimeter Wave Communications with Reconfigurable Antennas

Channel Estimation Method and Phase Shift Design for Reconfigurable Intelligent Surface Assisted MIMO Networks

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