Related papers: Resource Allocation of MU-OFDM Based Cognitive Rad…
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This paper has been withdrawn by the author due to a crucial problem associated with Figs. 2 and 3.
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This paper has been withdrawn by the author, due a crucial error in the optimization. For the last one month I have been trying to remove the error, but it seems to take a lot of time so I decided to withdraw this paper for the moment.
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This paper has been withdrawn by the author due to a crucial problem in Lemma 3. This equation must be changed.
This paper has been withdrawn by the author due to the incorrect argument for the security.