Distributed Compression for the Uplink of a Backhaul-Constrained Coordinated Cellular Network
The authors consider a backhaul-constrained coordinated cellular network. That is, a single-frequency network with N+1 multi-antenna Base Stations (BSs) that cooperate in order to decode the users' data, and that are linked by means of a common lossless backhaul, of limited capacity R. To implement receive cooperation, they propose distributed compression: N BSs, upon receiving their signals, compress them using a multisource lossy compression code. Then, they send the compressed vectors to a central BS, which performs users' decoding. Distributed Wyner-Ziv coding is proposed to be used, and is optimally designed in this paper.