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Vol. 159, Issue 11, November 2013, pp. 155-159




An Achievable Rate Region for Relay Multiple Access Channel Based on Decode-and-Forward
Xiaoxia Song, Yong Li

School of Mathematics and Computer Science, Shanxi Datong University, Datong 037009, Shanxi, China
E-mail: sxxly2002@163.com


Received: 10 September 2013   /Accepted: 25 October 2013   /Published: 30 November 2013

Digital Sensors and Sensor Sysstems


Abstract: In this paper, we model a specific relay channel named relay multiple access channel (RMAC) aiming at providing a clue to select the relay node in multiple access channels such as the uplink of cellular communication system. In this channel, the relay node not only aids to send the information of the source but also sends its private message to the destination. We derive the achievable rate regions based on decode-and-forward strategy for the discrete memoryless RMAC (DM-RMAC) and the additive white Gaussian noise RMAC (AWGN-RMAC), respectively. Numerical results of the achievable rate region for the AWGN-RMAC show that the proposed scheme can improve the rate of user far from the base station with the help of a relay node near to the base station.


Keywords: Relay multiple access channels, Relay channels, Multiple access channels, Achievable rate region, Decode-and-forward.


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