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Linear multicast beamforming schemes for coded caching
, Article 52nd Asilomar Conference on Signals, Systems and Computers, ACSSC 2018, 28 October 2018 through 31 October 2018 ; Volume 2018-October , 2019 , Pages 172-176 ; 10586393 (ISSN); 9781538692189 (ISBN) ; Kaleva, J ; Shariatpanahi, S. P ; Khalaj, B ; Matthews M. B ; Sharif University of Technology
IEEE Computer Society
2019
Abstract
A single cell downlink scenario is considered, where a multiple-antenna base station delivers contents to cache-enabled user terminals. Depending on the available degrees of freedom, several multicast messages are transmitted in parallel to distinct subsets of users. In the multicast beamformer design, we restrict ourselves to linear receiver implementation, which does not require successive interference cancellation unlike in the more optimal baseline scheme. With a small loss in performance, the complexity of both the receiver and transmitter implementation can be significantly reduced. © 2018 IEEE
Multicast beamformer design for coded caching
, Article IEEE International Symposium on Information Theory - Proceedings, 17 June 2018 through 22 June 2018 ; Volume 2018-June , 2018 , Pages 1914-1918 ; 21578095 (ISSN) ; 9781538647806 (ISBN) ; Shariatpanahi, S. P ; Kaleva, J ; Khalaj, B ; Sharif University of Technology
Abstract
A single cell downlink scenario is considered where a multiple-antenna base station delivers contents to cache-enabled user terminals. Using the ideas from multi-server coded caching (CC) scheme developed for wired networks, a joint design of CC and general multicast beamforming is considered to benefit from spatial multiplexing gain, improved interference management and the global CC gain, simultaneously. The proposed multicast beamforming strategies utilize the multiantenna multicasting opportunities provided by the CC technique and optimally balance the detrimental impact of both noise and inter-stream interference from coded messages transmitted in parallel. The proposed scheme is shown...
Multi-antenna interference management for coded caching
, Article IEEE Transactions on Wireless Communications ; Volume 19, Issue 3 , 2020 , Pages 2091-2106 ; Shariatpanahi, S. P ; Kaleva, J ; Khalaj, B. H ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2020
Abstract
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...