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Title: On the diversity gain region of the dynamic decode-and-forward relay-assisted Z-channel
Authors: Sirigina, Rajendra Prasad
Madhukumar, A. S.
Keywords: Engineering::Computer science and engineering
Issue Date: 2016
Source: Sirigina, R. P., & Madhukumar, A. S. (2018). On the diversity gain region of the dynamic decode-and-forward relay-assisted Z-channel. Wireless Networks, 24(2), 395-407. doi:10.1007/s11276-016-1339-3
Journal: Wireless Networks
Abstract: In an interference-limited system, the interference forwarding by a relay enhances the interference level and thereby enables the cancellation of the interference. In this work, interference forwarding by a half-duplex dynamic decode-and-forward (HD DDF) relay in a two-user Z-channel is considered. In the two-user Z-channel, one user is interference-limited while the other user is interference-free. The diversity gain region (DGR), which characterizes the tradeoff between the achievable diversity orders between the two users, is an appropriate performance metric for the Z-channel. Closed-form expression for the achievable DGR with the interference forwarding by the HD DDF relay is presented. The multiplexing gain regions (MGRs) where the HD DDF protocol achieves better DGR over the direct transmission scheme, full-duplex decode-and-forward (FD DF) and FD partial DF relay assisted Z- channel are identified. The HD DDF protocol is shown to achieve better DGR than the FD DF and FD PDF relay for a large range of MGR. The achievable DGRs for the HD DDF, FD DF, and FD PDF relay-assisted Z-channel and direct transmission scheme are presented for various interference levels and multiplexing gain pairs.
ISSN: 1022-0038
DOI: 10.1007/s11276-016-1339-3
Rights: © 2016 Springer Science+Business Media. This is a post-peer-review, pre-copyedit version of an article published in Wireless Networks. The final authenticated version is available online at:
Fulltext Permission: none
Fulltext Availability: No Fulltext
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