A Multi-Antenna Coded Caching Scheme with Linear Subpacketization
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by
MohammadJavad Salehi, Antti Tölli, Seyed Pooya Shariatpanahi
2019
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.
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1910.10384v1
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