Abstract
In this paper, we invoke sub-carrier pairing based sum-rate maximization problem in wireless
cooperative networks. Two-way relaying (TWR) with amplify-and-forward (AF) protocol is considered
in multi-user, multi-carrier environment over two-hop with single fixed relay station (FRS), in which
direct link between source and destination is not available. We formulate to maximize the overall sumrate and individual sum-rate achieved by users subject to sub-carrier pairing and data rate fairness.
The joint optimization of resources turn the problem to be combinatorial having NP-hard solution due
to its utmost computational complexity. Firstly, we propose an optimal solution and then a lowcomplexity resource allocation scheme based on “Hungarian Algorithm” is presented. Finally, the
simulation results of performance evaluation describe the effectiveness of sub-carrier pairing for sumrate maximization.
Shahzad Sarwar Bhatti, Muhammad Waheed, Muhammad Abrar, Muhammad Imran Malik, Suhail Aftab Qureshi, Abdul Sattar Malik. (2016) Sum-Rate Maximization of Multi-User OFDMA Two-way Relay Networks under Sub-Carrier Pairing and Fairness Constraints, Pakistan Journal of Engineering and Applied Sciences, VOLUME 18, Issue 1.
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