An Optimal Power Allocation for the Two-Way Relay System Using Physical-Layer Network Coding
2014 ◽
Vol 986-987
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pp. 2041-2047
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In this letter, an optimal power allocation in the two-way relay channel of four transmission nodes employing the physical-layer network coding (PNC) protocol is proposed to improve the network sum-rate of the two-way relay system. The optimal power allocation is obtained by maximizing the network sum-rate of the PNC protocol under a sum-power constraint in a Rayleigh fading channel environment. Analytical and simulation results show that the proposed power allocation can improve the network sum-rate. Furthermore, compared with the equal power allocation scheme, the proposed power allocation scheme can achieve much higher network sum-rate performance.
2011 ◽
Vol 18
(1)
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pp. 9-35
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2015 ◽
Vol 14
(6)
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pp. 3015-3032
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