A multi-antenna coded caching scheme with linear subpacketization

Salehi, Mohammad Javad; Tölli, Antti; Shariatpanahi, Seyed Pooya (2020-07-27)
 
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https://doi.org/10.1109/ICC40277.2020.9148593

Salehi, Mohammad Javad
Tölli, Antti
Shariatpanahi, Seyed Pooya
Institute of Electrical and Electronics Engineers
27.07.2020

M. Salehi, A. Tölli and S. P. Shariatpanahi, "A Multi-Antenna Coded Caching Scheme with Linear Subpacketization," ICC 2020 - 2020 IEEE International Conference on Communications (ICC), Dublin, Ireland, 2020, pp. 1-6, doi: 10.1109/ICC40277.2020.9148593

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doi:https://doi.org/10.1109/ICC40277.2020.9148593
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https://urn.fi/URN:NBN:fi-fe202102185257
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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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