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Generalized Degrees of Freedom of the Symmetric Cache-Aided MISO Broadcast Channel with Partial CSIT [article]

Enrico Piovano, Hamdi Joudeh, Bruno Clerckx
2018 arXiv   pre-print
For a symmetric setting, in terms of channel strength levels, partial channel knowledge levels and cache sizes, we characterize the generalized degrees of freedom (GDoF) up to a constant multiplicative  ...  We consider the cache-aided MISO broadcast channel (BC) in which a multi-antenna transmitter serves K single-antenna receivers, each equipped with a cache memory.  ...  The authors are with the Communications and Signal Processing group, Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, U.K.  ... 
arXiv:1712.05244v2 fatcat:vnypegsbbnfx7bnztl5b2oyeue

Generalized Degrees of Freedom of the Symmetric Cache-Aided MISO Broadcast Channel With Partial CSIT

Enrico Piovano, Hamdi Joudeh, Bruno Clerckx
2019 IEEE Transactions on Information Theory  
For a symmetric setting, in terms of channel strength levels, partial channel knowledge levels and cache sizes, we characterize the generalized degrees of freedom (GDoF) up to a constant multiplicative  ...  We consider the cache-aided MISO broadcast channel (BC) in which a multi-antenna transmitter serves K singleantenna receivers, each equipped with a cache memory.  ...  The authors are also grateful to Reviewer 1 for suggesting a shorter and more direct proof for Lemma 1.  ... 
doi:10.1109/tit.2019.2914204 fatcat:my26gubupnghzilde5dvegidfq

Towards an Extremal Network Theory – Robust GDoF Gain of Transmitter Cooperation over TIN [article]

Yao-Chia Chan, Junge Wang, Syed A. Jafar
2019 arXiv   pre-print
As our first result, we show that under finite precision CSIT, TIN is GDoF optimal for the K user IC throughout the CTIN regime.  ...  regime where a simple layered superposition (SLS) scheme is shown to be optimal in the K user MISO BC, albeit only for K≤ 3.  ...  Based on the symmetric settings, sum-GDoF gain of the symmetric K user MISO BC over the symmetric K user IC is at most a factor of 3/2 for all values of α ∈ [0, 1].  ... 
arXiv:1901.09885v2 fatcat:5c44bpvsc5blroqjcldf2yagzq

A Survey on Robust Interference Management in Wireless Networks

Jaber Kakar, Aydin Sezgin
2017 Entropy  
However, the main issue behind most of these results is the assumption of perfect channel state information at the transmitters (CSIT).  ...  To quantify the performance of these schemes, we use the well-known (generalized) degrees of freedom (GDoF) metric as the pre-log factor of achievable rates.  ...  In case of mixed CSIT, 4+2α 3 is the optimal DoF of the two-user MISO BC (D = 2) [27, 28] . DoF-optimality for the alternating CSIT setting on the two-user MISO BC has been established in [9] .  ... 
doi:10.3390/e19070362 fatcat:dthoc7lilncubcx4d7twsu4ucu

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends [article]

Yijie Mao, Onur Dizdar, Bruno Clerckx, Robert Schober, Petar Popovski, H. Vincent Poor
2022 arXiv   pre-print
a wide range of network loads (including both underloaded and overloaded regimes) and user channel conditions.  ...  Furthermore, it enjoys a higher robustness against imperfect channel state information at the transmitter (CSIT) and entails lower feedback overhead and complexity.  ...  GDoF region of the 2-user underloaded MISO BC with imperfect CSIT. 2018 [91] 2-user underloaded MISO BC Perfect CSIT Sum-rate Showed that RS achieves the sum capacity within a constant gap for the 2-user  ... 
arXiv:2201.03192v2 fatcat:z3ujjbqwxzc5dbgu3ganoqomae

Rate-splitting multiple access for downlink communication systems: bridging, generalizing, and outperforming SDMA and NOMA

Yijie Mao, Bruno Clerckx, Victor O.K. Li
2018 EURASIP Journal on Wireless Communications and Networking  
This capability of RSMA to partially decode interference and partially treat interference as noise enables to softly bridge the two extremes of fully decoding interference and treating interference as  ...  The three multiple access schemes are compared, and extensive numerical results show that RSMA provides a smooth transition between SDMA and NOMA and outperforms them both in a wide range of network loads  ...  Acknowledgements The authors are deeply indebted to Dr. Hamdi Joudeh for his helpful comments and suggestions.  ... 
doi:10.1186/s13638-018-1104-7 pmid:30996723 pmcid:PMC6438650 fatcat:kc26krfxf5ccli5alzq6erfk3y

Fundamental limits of robust interference management: from content-oblivious to content-aware wireless networks

Enrico Piovano, Bruno Clerckx, Imperial College London, Engineering And Physical Sciences Research Council
2020
We study the K-user multiple-input-single-output (MISO) broadcast channel (BC), where a K-antenna transmitter serves K single-antenna users, and we characterize the optimal degrees-of-freedom (DoF) region  ...  We first consider the K-user cache-aided MISO BC, where users are equipped with a cache memory.  ...  We can then see the similarity between the two-user MISO BC with partial CSIT and the two-user IC.  ... 
doi:10.25560/79298 fatcat:qufeh3rf5zcsleosrtbdtaneqm

Implementation of Fog computing for reliable E-health applications

Razvan Craciunescu, Albena Mihovska, Mihail Mihaylov, Sofoklis Kyriazakos, Ramjee Prasad, Simona Halunga
2015 2015 49th Asilomar Conference on Signals, Systems and Computers  
Also the tradeoff between performance and necessary amount of downlink feedback bits is taken into account in our analysis.  ...  He received the B.A.Sc. degree (with honors) from the University of British Columbia, Vancouver, BC, Canada, in 1985 and the M.A.Sc. and Ph.D. degrees from The 5th generation (5G) wireless communication  ...  Our initial results show that appropriately designed incentives can bridge the gap between the game and team setup.  ... 
doi:10.1109/acssc.2015.7421170 dblp:conf/acssc/CraciunescuMMKP15 fatcat:qm6mki5z6bcvrfimkmqjyrxaxm