Open AccessAchievable rate regions for many‐to‐one Gaussian interference channel with a fusion centre
Author(s) -
Baianifar Mahdi,
Behroozi Hamid
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.0590
Subject(s) - additive white gaussian noise , channel (broadcasting) , interference (communication) , computer science , relay , integer (computer science) , algorithm , gaussian , transmission (telecommunications) , single antenna interference cancellation , topology (electrical circuits) , interference alignment , telecommunications , mathematics , mimo , physics , combinatorics , quantum mechanics , power (physics) , programming language
This paper considers a many‐to‐one Gaussian interference channel with a fusion centre (FC) where there is a K ‐user interference channel in which only one relay (receiver) faces interference while the remaining K‐1 receivers are interference free. All the relays communicate information about their observed sequence to the FC through noiseless links at communication rate R 0 . First, by analysing traditional relaying schemes, i.e., Decode and Forward, Compress and Forward and Compute and Forward, three rate‐regions for this setting are derived. Then, based on nested lattice codes, a new achievable rate‐region is provided. Based on the proposed scheme, one can design a transmission scheme that can recover both integer and non‐integer linear combination of messages. Numerical examples show that if channel gains are integer, the proposed scheme performs similarly to the compute‐and‐forward scheme. In the case of non‐integer channel gains, the proposed scheme outperforms other relaying schemes at high signal‐to‐noise ratios. Finally, it is shown that if the channel gains are larger than one and if the rate of each relay‐to‐FC link equals to the capacity of an AWGN channel, then the proposed scheme can achieve the capacity region in high SNR regime.