Extended Placement Delivery Arrays for Multi-Antenna Coded Caching Scheme
K. K. Krishnan Namboodiri, Elizabath Peter, B. Sundar Rajan

TL;DR
This paper introduces Extended Placement Delivery Arrays (EPDAs) for multi-antenna coded caching, enabling schemes that achieve full degrees of freedom with reduced subpacketization, improving efficiency over existing methods.
Contribution
The paper proposes a novel EPDA framework for multi-antenna coded caching, providing explicit constructions that optimize degrees of freedom and reduce subpacketization.
Findings
Achieves maximum DoF of t+L in multi-antenna caching schemes.
Constructs EPDAs for specific user and antenna configurations.
Reduces subpacketization compared to previous schemes.
Abstract
The multi-antenna coded caching problem, where the server having transmit antennas communicating to users through a wireless broadcast link, is addressed. In the problem setting, the server has a library of files, and each user is equipped with a dedicated cache of capacity . The idea of extended placement delivery array (EPDA), an array which consists of a special symbol and integers in a set , is proposed to obtain a novel solution for the aforementioned multi-antenna coded caching problem. From a EPDA, a multi-antenna coded caching scheme with users, and the server with transmit antennas, can be obtained in which the normalized memory , and the delivery time . The placement delivery array (for single-antenna coded caching scheme) is a special class of EPDAs with . For the…
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Taxonomy
TopicsCooperative Communication and Network Coding · Caching and Content Delivery · RFID technology advancements
