A. Tölli, S. P. Shariatpanahi, J. Kaleva and B. H. Khalaj, "Multi-Antenna Interference Management for Coded Caching," in IEEE Transactions on Wireless Communications, vol. 19, no. 3, pp. 2091-2106, March 2020. doi: 10.1109/TWC.2019.2962686
Multi-antenna interference management for coded caching
|Author:||Tölli, Antti1; Shariatpanahi, Seyed Pooya2; Kaleva, Jarkko1;|
1Centre for Wireless Communications, University of Oulu P.O. Box 4500, FIN-90014 University of Oulu, Finland
2School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran IR 1439957131, Iran
3Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
|Online Access:||PDF Full Text (PDF, 0.9 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202003178312
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2020-03-17
A multi-antenna broadcast channel scenario is considered where a base station delivers contents to cache-enabled user terminals. A joint design of coded caching (CC) and multigroup multicast beamforming is proposed to benefit from spatial multiplexing gain, improved interference management and the global CC gain, simultaneously. The developed general content delivery strategies utilize the multiantenna multicasting opportunities provided by the CC technique while optimally balancing the detrimental impact of both noise and inter-stream interference from coded messages transmitted in parallel. Flexible resource allocation schemes for CC are introduced where the multicast beamformer design and the receiver complexity are controlled by varying the size of the subset of users served during a given time interval, and the overlap among the multicast messages transmitted in parallel, indicated by parameters α and β, respectively. Degrees of freedom (DoF) analysis is provided showing that the DoF only depends on α while it is independent of β. The proposed schemes are shown to provide the same degrees-of-freedom at high signal-to-noise ratio (SNR) as the state-of-art methods and, in general, to perform significantly better, especially in the finite SNR regime, than several baseline schemes.
IEEE transactions on wireless communications
|Pages:||2091 - 2106|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
This work was supported in part by the Academy of Finland grants No. 279101 and 319059, as well as 6Genesis Flagship grant No. 318927.
|Academy of Finland Grant Number:||
279101 (Academy of Finland Funding decision)
319059 (Academy of Finland Funding decision)
318927 (Academy of Finland Funding decision)
© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.