Rate-optimal fair power allocation in complex field network coded relay communications

Eritmen, Kayhan and Keskinöz, Mehmet (2016) Rate-optimal fair power allocation in complex field network coded relay communications. Wireless Networks, 22 (4). pp. 1251-1267. ISSN 1022-0038 (Print) 1572-8196 (Online)

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In this paper, we consider the complex field network coded relay assisted communication (CFNC-RAC) channel. Although CFNC-RAC is spectrally efficient, its bit error rate performance is degraded by multi-access interference, which can be improved by appropriately allocating the user and relay powers. Since the fairness is an important factor for a practical multi-user communication system, we have proposed a rate-optimal fair power adaptation (ROFPA) technique in this work. The proposed ROFPA policy not only aims to maximize the average achievable sum-rate of CFNC-RAC under the use of the decode and forward relaying but also intends to satisfy the average rate-fairness restriction while taking the total power constraint and the network topology into account. We formulate the ROFPA as a non-convex optimization program and then derive an analytical solution for it. Extensive performance evaluation and numerical simulations validate that ROFPA method can provide significant sum-rate with considerable user fairness when compared to symbol-error-rate optimized (SER-OPT) policy proposed by Eritmen et al. (Wirel Netw, 2015. doi:10.1007/s11276-015-0924-1).
Item Type: Article
Uncontrolled Keywords: Complex field network coding; Relay communication; Decode-and-forward relaying; Power allocation; Average rate-fairness
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: Mehmet Keskinöz
Date Deposited: 07 Nov 2016 15:18
Last Modified: 07 Nov 2016 15:18
URI: https://research.sabanciuniv.edu/id/eprint/30795

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