  This paper considers a single cell multi-antenna base station delivering
content to multiple cache enabled single-antenna users. Coding strategies are
developed that allow for decentralized placement in the wireless setting. Three
different cases namely, max-min multicasting, linear combinations in the
complex field, and linear combinations in the finite field, are considered and
closed-form rate expressions are provided that hold with high probability. For
the case of max-min fair multicasting delivery, we propose a new coding scheme
that is capable of working with only two-user broadcasts. A cyclic-exchange
protocol for efficient content delivery is proposed and shown to perform almost
as well as the original multi-user broadcast scheme.
