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| Optimal Power Allocation for a Cooperative Network Coding Scheme |
| Ji Yan-cheng Ge Jian-hua Li Jing |
| State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China |
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Abstract To improve the resource utilization of traditional two-way wireless relay system which employs Equal Power Allocation (EPA) between the source and relays, an Optimal Power Allocation (OPA) algorithm for a cooperative network coding scheme is proposed. By minimizing the larger outage probability of the two sources and using the high order approximation of outage expression, the optimal power factors are obtained through iterative computation. The proposed algorithm has low implementation complexity and only needs the average channel gain information. Simulation results show that compared to the EPA algorithm, the proposed OPA algorithm is superior in terms of both outage and Symbol Error Rate (SER) performance.
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Received: 06 November 2009
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Corresponding Authors:
Ji Yan-Cheng
E-mail: xd.jyc@163.com
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2010, Vol. 32 
