On the hybrid relaying protocol for time division broadcasting. Issue 5 (6th November 2013)

• Record Type: Journal Article
• Authors: Xu, Youyun; Xia, Xiaochen; Xu, Kui; Zhang, Dongmei
• Is Part Of: Transactions on emerging telecommunications technologies. Volume 26:Issue 5(2015)
• Page Start: 893
• Page End: 904
• Publication Date: 2013-11-06
• Subjects: Telecommunication -- Periodicals; 384.05
• DOI: 10.1002/ett.2761
• Languages: English
• ISSNs: 2161-5748

Abstract

Abstract: In this paper, a new hybrid relaying protocol is investigated for the time division broadcasting protocol. Instead of simply performing amplified‐and‐forward or decode‐and‐forward on the received information of terminals, a well‐designed hybrid relaying protocol, in which network coding (i.e. the bit‐wise XOR) and superposition coding are chosen reasonably to combine the information of the terminals, is employed by the relay to forward the information of terminals. The approximate outage probability for the proposed protocol is derived in closed form, and the tightness of the expression is verified by Monte Carlo simulations. Meanwhile, the achievable diversity of the proposed protocol is analysed. Through both analytic and simulation results, we show that the proposed protocol can always achieve full diversity of two through reasonably selecting between the combining methods at the relay. The performance improvement of the proposed protocol is demonstrated through comparisons with several existing protocols in two different scenarios: (1) the transmitted power of the relay is less than the transmitted power of terminal and (2) the transmitted power of the relay is greater than or equal to the transmitted power of terminal. Finally, an optimal power allocation scheme at the relay is presented for the proposed protocol to minimise the outage probability. Copyright © 2013 John Wiley & Sons, Ltd. Abstract : A novel hybrid two‐way relaying protocol, where network coding and superposition coding are employed opportunistically at the relay to combine the data of the terminals, is proposed. The outage probability for the proposed protocol is derived, and the diversity is analysed. The optimal power allocation at the relay is presented to optimise the outage performance. It is shown that the proposed protocol achieves full diversity of two and outperforms the existing protocols.