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ICC
2008
IEEE

Two-Way Relaying over OFDM: Optimized Tone Permutation and Power Allocation

8 years 8 months ago
Two-Way Relaying over OFDM: Optimized Tone Permutation and Power Allocation
—We consider an amplify-and-forward scheme for two-way relaying over OFDM, in which two nodes wish to exchange information via a relay. Assuming full channel knowledge, we perform power allocation for the relay and both informationexchanging nodes, as well as tone permutation at the relay, so as to maximize the sum capacity. A dual decomposition technique is employed for power allocation, while a greedy approach is proposed for tone permutation. In particular, we explore an interesting water-filling behavior displayed by this power allocation solution. Numerical results demonstrate that substantial capacity gains are achieved by implementing the two proposed solutions, either individually or successively.
Chin Keong Ho, Rui Zhang, Ying-Chang Liang
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICC
Authors Chin Keong Ho, Rui Zhang, Ying-Chang Liang
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