Robust Successive Compute-and-Forward over Multi-User Multi-Relay Networks
Journal article, 2016

This paper develops efficient Compute-and-forward (CMF) schemes in multi-user multi-relay networks. To solve the rank failure problem in CMF setups and to achieve full diversity of the network, we introduce two novel CMF methods, namely, extended CMF and successive CMF. The former, having low complexity, is based on recovering multiple equations at relays. The latter utilizes successive interference cancellation (SIC) to enhance the system performance compared to the state-of-the-art schemes. Both methods can be utilized in a network with different number of users, relays, and relay antennas, with negligible feedback channels or signaling overhead. We derive new concise formulations and explicit framework for the successive CMF method as well as an approach to reduce its computational complexity. Our theoretical analysis and computer simulations demonstrate the superior performance of our proposed CMF methods over the conventional schemes. Furthermore, based on our simulation results, the successive CMF method yields additional signal-to-noise ratio gains and shows considerable robustness against channel estimation error, compared to the extended CMF method.

Author

Mohsen Hejazi

Sharif University of Technology

Seyed Mohammad Azimi-Abarghouyi

Sharif University of Technology

Behrooz Makki

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Masoumeh Nasiri-Kenari

Sharif University of Technology

Tommy Svensson

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

IEEE Transactions on Vehicular Technology

0018-9545 (ISSN)

Vol. 65 10 8112-8129

Areas of Advance

Information and Communication Technology

Subject Categories

Communication Systems

DOI

10.1109/TVT.2015.2506981

More information

Latest update

11/20/2018