Results 191 to 200 of about 13,357 (238)
FDD-Based Cell-Free Massive MIMO Systems
2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2018 Cell-free massive MIMO system is a promising technology of 5G wireless communications that provide a user-centric coverage to the user by the basestation cooperation. Most prior works on the cell-free massive MIMO systems assume the time division duplexing (TDD) systems, although the frequency division duplexing (FDD) systems dominate the current ...
Seungnyun Kim, Byonghyo Shim
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Cell Free Massive MIMO with Limited Capacity Fronthaul
Wireless Personal Communications, 2018 Massive MIMO has shown to be a promising candidate for the next generation of mobile communications 5G. Cell free massive MIMO is an implementation in which antennas are distributed throughout the coverage area and the whole area is considered as a single cell. Despite increasing spectral efficiency, cell free massive MIMO has some practical challenges.
Mahdi N. Boroujerdi +2 more
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Structured Massive Access for Scalable Cell-Free Massive MIMO Systems
IEEE Journal on Selected Areas in Communications, 2021 How to meet the demand for increasing number of users, higher data rates, and stringent quality-of-service (QoS) in the beyond fifth-generation (B5G) networks? Cell-free massive multiple-input multiple-output (MIMO) is considered as a promising solution,
Shuaifei Chen +2 more
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IEEE Transactions on Communications, 2021 Future wireless networks need to support massive machine type communication (mMTC) where a massive number of devices accesses the network and massive MIMO is a promising enabling technology. Massive access schemes have been studied for co-located massive
Unnikrishnan Kunnath Ganesan +2 more
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Precoding and Power Optimization in Cell-Free Massive MIMO Systems
IEEE Transactions on Wireless Communications, 2017 Elina Nayebi +2 more
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2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2021
We derive formulas and algorithms to numerically calculate SINRs and max-min power controls for Cell-Free Massive MIMO in LoS channels. We consider MR (maximum-ratio), ZF (zero-forcing), and optimal linear processing for both downlink and uplink. Unlike cellular Massive MIMO, users in cell-free are statistically similar, thus dropping or rescheduling ...
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We derive formulas and algorithms to numerically calculate SINRs and max-min power controls for Cell-Free Massive MIMO in LoS channels. We consider MR (maximum-ratio), ZF (zero-forcing), and optimal linear processing for both downlink and uplink. Unlike cellular Massive MIMO, users in cell-free are statistically similar, thus dropping or rescheduling ...
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Cell-Free Massive MIMO systems
2015 49th Asilomar Conference on Signals, Systems and Computers, 2015Cell-Free Massive MIMO systems comprise a large number of distributed, low cost, and low power access point antennas, connected to a network controller. The number of antennas is significantly larger than the number of users. The system is not partitioned into cells and each user is served by all access point antennas simultaneously.
Elina Nayebi +3 more
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SWIPT in Cell-Free Massive MIMO
2018 IEEE Global Communications Conference (GLOBECOM), 2018In this paper, the performance of simultaneous wireless information and power transfer (SWIPT) for training-based cell-free massive multiple-input multiple-output (MIMO) is investigated. The key idea is to simultaneously transmit information and power via a larger number of spatially-distributed single antenna access points (APs) towards geographically-
Rajan Shrestha, Gayan Amarasuriya
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2023
Distributed multiple-input multiple-output (MIMO) systems hinge on cooperative signal processing techniques to turn interference into desired signal, thereby providing excellent levels of quality of service throughout the network. Specifically, multiple geographically distributed access points jointly and coherently serve all the users in their joint ...
Interdonato, Giovanni, Buzzi, Stefano
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Distributed multiple-input multiple-output (MIMO) systems hinge on cooperative signal processing techniques to turn interference into desired signal, thereby providing excellent levels of quality of service throughout the network. Specifically, multiple geographically distributed access points jointly and coherently serve all the users in their joint ...
Interdonato, Giovanni, Buzzi, Stefano
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Cell Free Massive MIMO with Constrained Coverage
Wireless Personal Communications, 2017As new generations of mobile radio come into service, bandwidth is becoming more and more scarce and systems with very high spectral efficiency become vital. Having a high spectral efficiency, Massive MIMO has shown to be a promising candidate for 5G. Distributing antennas in such systems make them even more spectrally efficient. Cell free Massive MIMO
Mahdi N. Boroujerdi +2 more
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