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Distributed beamforming (DBF) is a cooperative technology that several nodes transmit a common message to a receiver efficiently. The key to DBF is to ensure every node's signal adds coherently at the receiver by synchronizing node's carrier phase. In this paper, we present a closed-loop deterministic phase synchronization algorithm in order to pursue less(More)
While a cognitive radio network sharing the spectrum with a primary network, one of the major concerns is that harmful interference to the primary users should be avoided. In this paper, we propose three low-complexity algorithms for distributed beamforming in cognitive radio networks which opportunistically select a subset of cognitive source nodes whose(More)
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