Title :
Joint Relay Selection and Power Allocation in Cooperative-Diversity System
Author :
Bai, Xiao ; Liu, Danpu ; Yue, Guangxin ; Wu, Huarui
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, we propose two novel algorithms where relay selection and power allocation are jointly considered in order to optimize ergodic capacity in AF (Amplify-and-forward) cooperative diversity communication. In S-AR algorithm, joint power allocation and relay selection is performed to maximize the received SNR at the destination node. In S-OR algorithm, the best relay with maximal instantaneous channel gain is selected at first, and then power is allocated between source and the relay in an optimized way to maximize ergodic capacity. Through Monte Carlo simulation, a conclusion can be drawn that such selective-relay scenarios with joint power allocation have better throughput performance than that of parallel-relay scenario. Furthermore, S-AR algorithm is better than S-OR algorithm when throughput of the cooperative-diversity system is considered.
Keywords :
Monte Carlo methods; cooperative systems; diversity reception; resource allocation; wireless channels; Monte Carlo simulation; S-AR algorithm; amplify-and-forward ommunication; cooperative diversity communication; cooperative diversity system; ergodic capacity; instantaneous channel gain; joint relay selection; parallel relay; power allocation; Decoding; Forward contracts; Mobile communication; Mobile computing; Power system relaying; Relays; Telecommunication computing; Throughput; Wireless communication; Wireless networks; Amplify-and-Forward; Cooperative-Diversity; Power Allocation; Relay Selection;
Conference_Titel :
Communications and Mobile Computing (CMC), 2010 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-6327-5
Electronic_ISBN :
978-1-4244-6328-2
DOI :
10.1109/CMC.2010.80