Exploring Coordinated Multipoint Beamforming Strategies for 5G Cellular

Schwarz, Štefan; Rupp, Markus

doi:10.1109/access.2014.2353137

Cited by 37 publications

(14 citation statements)

References 58 publications

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“…With a transmit array of M antennas it is also possible to send M orthogonal streams and thus serve up to M independent users simultaneously. To this end, appropriate precoding, so called multiuser multiple-input multiple-output (MIMO) precoding, is necessary [15,16]. These precoding schemes suppress the co-channel interference among the independent nodes such that each node can decode its signal in the presence of only limited or no interference.…”

Section: Multi-antenna Systemsmentioning

confidence: 99%

“…Such a multi-antenna transmitter could either be a node with multiple antennas, such as a base station in a cellular network or an access point in a wireless local area network (WLAN), or equivalently a virtual antenna array formed by a cluster of cooperating nodes in a mobile ad hoc network (MANET). Multi-user MIMO precoding schemes have been studied extensively in the context of coordinated multipoint transmission and various proposals have been made [16]. A very promising approach is leakage based precoding, where for a desired signal to an intended user the co-channel interference is reduced by minimizing the transmitted interference to all unintended users (further called leakage) [18,[54][55][56][57].…”

Section: Leakage Based Multi-user Mimo Precodingmentioning

confidence: 99%

“…With P Tx = 1, the resulting channel matrix is then determined as 16) with F the fading matrix with i.i.d. elements ∼ CN (0, 1).…”

Section: Numerical Evaluationsmentioning

confidence: 99%

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Low Complexity Physical Layer Cooperation Concepts for Mobile Ad Hoc Networks

Rüegg¹

2018

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Due to the rapid development of wireless communication technologies, its widespread distribution in our daily life, and emerging applications such as ultra high definition mobile video streaming, autonomous driving, or the internet of things with billions of connected devices, future wireless networks face high demands on achievable data rates, coverage, connectivity and delay. Physical layer cooperative communication has a huge potential to meet these demands. By forming a virtual antenna array among multiple nodes, the array gain, the diversity gain and the spatial multiplexing gain of multiantenna systems can be exploited. This allows to strongly improve the performance of mobile wireless networks.In this thesis physical layer cooperative communication schemes are investigated to improve the spectral efficiency, the scalability and the coverage range of mobile ad hoc networks (MANETs). We thereby focus on systems with low complexity. Specifically, we investigate multistage cooperative broadcasting to efficiently share common information with a large number of nodes, and provide an accurate performance prediction to it. We furthermore introduce leakage based beam shaping to increase the transmission range, while the signal in undesired directions is suppressed. Moreover, we propose simple resource allocation algorithms for quantize-and-forward receive cooperation to increase the spectral efficiency. We provide theoretical analysis and numerical evaluations of these schemes and investigate their performance, respectively the performance of combinations thereof, in two different scenarios: military MANETs and urban traffic hotspots with ultra high user density. We thereby show that with the proposed schemes the scalability, the coverage range and the throughput of wireless mobile networks can be strongly increased in the considered setups at low complexity and limited delay. Considering, e.g., transmit/receive virtual multiple-input multiple-output (MIMO) for traffic offloading to residential WLAN access points in urban hotspots, very large gains can be achieved compared to non-cooperating schemes if the local exchange is done out-of-band, e.g., in the 60 GHz band. Due to the large available bandwidth, very high exchange rates can be attained. Thereby, cooperative broadcasting is shown to be a key enabler for an efficient data exchange, as it can circumvent the high path loss and i Abstract the strong shadowing at 60 GHz, even with omnidirectional antennas.In addition to the cooperative communication schemes, we investigate the relation between the applied transmit power and the resulting interference power at unintended users (so called leakage power) in leakage based precoding, a promising multi-user MIMO precoding approach. Based on these investigations, we propose a target rate precoding as well as a rate optimal precoding, and provide a quasi closed-form solution for both. These precoding schemes lead to promising results and allow to optimize the network performance in terms of outage probability and throug...

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Section: Multi-antenna Systemsmentioning

confidence: 99%

Section: Leakage Based Multi-user Mimo Precodingmentioning

confidence: 99%

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Low Complexity Physical Layer Cooperation Concepts for Mobile Ad Hoc Networks

Rüegg¹

2018

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“…The reader is referred to [116] and [117] for further details on CoMP and more recent study on CoMP for 5G networks, respectively. For D2D communication, [118] and [119] provide comprehensive survey and tutorial on the subject.…”

Section: Decive-to-device Cooperationmentioning

confidence: 99%

Separation Framework: An Enabler for Cooperative and D2D Communication for Future 5G Networks

Mustafa

Imran

Shakir

et al. 2016

IEEE Commun. Surv. Tutorials

113

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Soaring capacity and coverage demands dictate that future cellular networks need to migrate soon toward ultra-dense networks. However, network densification comes with a host of challenges that include compromised energy efficiency, complex interference management, cumbersome mobility management, burdensome signaling overheads, and higher backhaul costs. Interestingly, most of the problems that beleaguer network densification stem from legacy networks' one common feature, i.e., tight coupling between the control and data planes regardless of their degree of heterogeneity and cell density. Consequently, in wake of 5G, control and data planes separation architecture (SARC) has recently been conceived as a promising paradigm that has potential to address most of the aforementioned challenges. In this survey, we review various proposals that have been presented in the literature so far to enable SARC. More specifically, we analyze how and to what degree various SARC proposals address the four main challenges in network densification, namely: energy efficiency, system level capacity maximization, interference management, and mobility management. We then focus on two salient features of future cellular networks that have not yet been adapted in legacy networks at wide scale and thus remain a hallmark of 5G, i.e., coordinated multipoint (CoMP) and device-to-device (D2D) communications. After providing necessary background on CoMP and D2D, we analyze how SARC can particularly act as a major enabler for CoMP and D2D in context of 5G. This article thus serves as both a tutorial as well as an up-to-date survey on SARC, CoMP, and D2D. Most importantly, this survey provides an extensive outlook of challenges and opportunities that lie at the crossroads of these three mutually entangled emerging technologies

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“…Correspondingly, the scope is on point-to-point simulations of the transmitter-receiver chain (channel coding, multiple-input multiple-output (MIMO) processing, multicarrier modulation, channel estimation, equalization,...) supporting a broad range of simulation parameters. Nevertheless, multi-point communications with a small number of transmitters and receivers are possible (limited only by computational complexity) to simulate, e.g., multi-point precoding techniques [17], rate splitting approaches [18], interference alignment concepts [19]. The transmission of signals over wireless channels thereby is implemented up to the individual signal samples and thus provides a very high level of detail and accuracy.…”

Section: Introductionmentioning

confidence: 99%

Versatile mobile communications simulation: the Vienna 5G Link Level Simulator

Pratschner

Tahir

Marijanović

et al. 2018

J Wireless Com Network

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Research and development of mobile communications systems require a detailed analysis and evaluation of novel technologies to further enhance spectral efficiency, connectivity and reliability. Due to the exponentially increasing demand of mobile broadband data rates and challenging requirements for latency and reliability, mobile communications specifications become increasingly complex to support ever more sophisticated techniques. For this reason, analytic analysis as well as measurement based investigations of link level methods soon encounter feasibility limitations. Therefore, computer aided numeric simulation is an important tool for investigation of wireless communications standards and is indispensable for analysis and developing future technologies. In this contribution, we introduce the Vienna 5G Link Level Simulator, a Matlab-based link level simulation tool to facilitate research and development of 5G and beyond mobile communications. Our simulator enables standard compliant setups according to 4G Long Term Evolution, 5G new radio and even beyond, making it a very flexible simulation tool. Offered under an academic use license to fellow researchers it considerably enhances reproducibility in wireless communications research. We give a brief overview of our simulation platform and introduce unique features of our link level simulator in more detail to outline its versatile functionality.

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Exploring Coordinated Multipoint Beamforming Strategies for 5G Cellular

Cited by 37 publications

References 58 publications

Low Complexity Physical Layer Cooperation Concepts for Mobile Ad Hoc Networks

Low Complexity Physical Layer Cooperation Concepts for Mobile Ad Hoc Networks

Separation Framework: An Enabler for Cooperative and D2D Communication for Future 5G Networks

Versatile mobile communications simulation: the Vienna 5G Link Level Simulator

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