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Max-Min Power Contr...
Max-Min Power Control in Downlink Massive MIMO With Distributed Antenna Arrays
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- Akbar, Noman (författare)
- Australian Natl Univ, Res Sch Engn, Canberra, ACT 2600, Australia.
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- Björnson, Emil, Professor, 1983- (författare)
- Linköpings universitet,Kommunikationssystem,Tekniska fakulteten
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- Yang, Nan (författare)
- Australian Natl Univ, Res Sch Engn, Canberra, ACT 2600, Australia.
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- Larsson, Erik G (författare)
- Linköpings universitet,Kommunikationssystem,Tekniska fakulteten
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Australian Natl Univ, Res Sch Engn, Canberra, ACT 2600, Australia Kommunikationssystem (creator_code:org_t)
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2021
- 2021
- Engelska.
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Ingår i: IEEE Transactions on Communications. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 0090-6778 .- 1558-0857. ; 69:2, s. 740-751
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
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- In this paper, we investigate optimal downlink power allocation in massive multiple-input multiple-output (MIMO) networks with distributed antenna arrays (DAAs) under correlated and uncorrelated channel fading. In DAA massive MIMO, a base station (BS) consists of multiple antenna sub-arrays. Notably, the antenna sub-arrays are deployed in arbitrary locations within a DAA massive MIMO cell. Consequently, the distance-dependent large-scale propagation coefficients are different from a user to these different antenna sub-arrays, which makes power control a challenging problem. We assume that the network operates in time-division duplex mode, where each BS obtains the channel estimates via uplink pilots. Based on the channel estimates, the BSs perform maximum-ratio transmission in the downlink. We then derive a closed-form signal-to-interference-plus-noise ratio (SINR) expression, where the channels are subject to correlated fading. Based on the SINR expression, we propose a network-wide max-min power control algorithm to ensure that each user in the network receives a uniform quality of service. Numerical results demonstrate the performance advantages offered by DAA massive MIMO. For some specific scenarios, DAA massive MIMO can improve the average per-user throughput up to 55%. Furthermore, we demonstrate that channel fading covariance is an important factor in determining the performance of DAA massive MIMO.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
Nyckelord
- Massive MIMO
- Antenna arrays
- Power control
- Channel estimation
- Downlink
- Fading channels
- Distributed wireless networks
- max-min power control
- optimization
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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