Capacity of the Gaussian Two-Hop Full-Duplex Relay Channel With Residual Self-Interference

Journal article


Publication Details

Author(s): Zlatanov N, Sippel E, Jamali Kooshkghazi V, Schober R
Journal: IEEE Transactions on Communications
Publication year: 2017
ISSN: 0090-6778
Language: English


Abstract


In this paper, we investigate the capacity of the Gaussian two-hop full-duplex (FD) relay channel with residual self-interference. This channel is comprised of a source, an FD relay, and a destination, where a direct source-destination link does not exist and the FD relay is impaired by residual self-interference. We adopt the worst case linear self-interference model with respect to the channel capacity, and model the residual self-interference as a Gaussian random variable whose variance depends on the amplitude of the transmit symbol of the relay. For this channel, we derive the capacity and propose an explicit capacity-achieving coding scheme. Thereby, we show that the optimal input distribution at the source is Gaussian and its variance depends on the amplitude of the transmit symbol of the relay. On the other hand, the optimal input distribution at the relay is discrete or Gaussian, where the latter case occurs only when the relay-destination link is the bottleneck link. The derived capacity converges to the capacity of the two-hop ideal FD relay channel without self-interference and to the capacity of the two-hop half-duplex (HD) relay channel in the limiting cases when the residual self-interference is zero and infinite, respectively. Our numerical results show that significant performance gains are achieved with the proposed capacity-achieving coding scheme compared with the achievable rates of conventional HD relaying and/or conventional FD relaying.



FAU Authors / FAU Editors

Jamali Kooshkghazi, Vahid
Lehrstuhl für Digitale Übertragung
Schober, Robert Prof. Dr.-Ing.
Lehrstuhl für Digitale Übertragung
Sippel, Erik
Lehrstuhl für Hochfrequenztechnik
Zlatanov, Nikola
Lehrstuhl für Digitale Übertragung


How to cite

APA:
Zlatanov, N., Sippel, E., Jamali Kooshkghazi, V., & Schober, R. (2017). Capacity of the Gaussian Two-Hop Full-Duplex Relay Channel With Residual Self-Interference. IEEE Transactions on Communications. https://dx.doi.org/10.1109/TCOMM.2017.2653112

MLA:
Zlatanov, Nikola, et al. "Capacity of the Gaussian Two-Hop Full-Duplex Relay Channel With Residual Self-Interference." IEEE Transactions on Communications (2017).

BibTeX: 

Last updated on 2018-11-08 at 01:31