A Multi-Antenna Coded Caching Scheme with Linear Subpacketization
MohammadJavad Salehi, Antti Tölli, Seyed Pooya Shariatpanahi
Abstract
Exponentially growing subpacketization is known to be a major issue for practical implementation of coded caching, specially in networks with multi-antenna communication setups. We provide a new coded caching scheme for such networks, which requires linear subpacketization and is applicable to any set of network parameters, as long as the multi-antenna gain L is larger than or equal to the global caching gain t. Our scheme includes carefully designed cache placement and delivery algorithms; which are based on circular shift of two generator arrays in perpendicular directions. It also achieves the maximum possible degrees of freedom of t+L, during any transmission interval.
Topics & Concepts
Computer scienceCacheScheme (mathematics)Antenna (radio)Transmission (telecommunications)Set (abstract data type)Interval (graph theory)Electronic engineeringComputer networkTelecommunicationsMathematicsEngineeringMathematical analysisCombinatoricsProgramming languageCaching and Content DeliveryCooperative Communication and Network CodingAdvanced Data Storage Technologies