Rateless Coded Downlink Transmission in Cloud Radio Access Network
In this paper, we consider the downlink in cloud radio access networks (C-RAN). In the network, multiple users are served by a cluster of remote radio heads (RRHs), which are connected to the building baseband units (BBU) pool through the fronthaul links with limited capacity. We propose a rateless coded transmission scheme which the rateless coding, precoding, signal compression are jointly designed for the C-RAN downlink. In order to approach the theoretical limit, we further optimize the degree profiles of rateless code based on extrinsic information transfer (EXIT) function analysis.
KeywordsCloud radio access networks Rateless code Degree profile optimization
This work was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LY17F010014.
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