Skip to Main content Skip to Navigation
New interface
Conference papers

An achievable rate region of broadcast relay channel with state feedback

Abstract : —In this paper, we investigate the fast fading broadcast relay channel (BRC) with one source (macrocell BS), one relay (smallcell BS), and two destinations (mobile users). We assume that the instantaneous channel state information (CSI) is known only at the receivers' side, whereas the relay can obtain a noiseless CSI feedback from the destinations about the source-destination channels (with delay). An inner bound on the capacity region of this channel is derived based on a partial-decode-compress-forward (PDCF) scheme. The main idea is to let the relay decode a significant portion of the source messages and then generate and forward to the receivers some useful side information using both the decoded messages and the CSI feedback. Numerical results show that, thanks to the feedback, the proposed scheme provides a non-negligible gain over conventional decode-forward/compress-forward schemes in terms of sum-rate performance, especially in the high SNR regime. Quite remarkably, we show that overall transmit power of the macrocell network can be significantly reduced owing to the feedback from users to the smallcell BS.
Document type :
Conference papers
Complete list of metadata

Cited literature [13 references]  Display  Hide  Download
Contributor : Sheng Yang Connect in order to contact the contributor
Submitted on : Sunday, January 24, 2016 - 11:53:26 PM
Last modification on : Sunday, June 26, 2022 - 2:25:52 AM
Long-term archiving on: : Monday, April 25, 2016 - 10:12:27 AM


Files produced by the author(s)



Chao He, Sheng Yang, Pablo Piantanida. An achievable rate region of broadcast relay channel with state feedback. IEEE International Conference on Communications (ICC 2015), Jun 2015, London, United Kingdom. ⟨10.1109/ICC.2015.7248981⟩. ⟨hal-01261222⟩



Record views


Files downloads