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Spectrum sensing is the precondition for opportunistic spectrum access. The quiet period is commonly used during the sensing period to avoid the interference from the cognitive radio networks. In this paper, we propose a new sensing algorithm which can avoid the usage of quiet period to guarantee the transmission performance of secondary users. The presence or absence of the primary signal is judged...
The energy based test is a popular detection scheme for cognitive radio (CR). However, it is infeasible or confronted with difficulty in threshold determination when a reference noise power level is unavailable or inaccurate. In fact, the presence of a primary signal not only changes the received signal energy, but also its correlation structure. In this paper, we show how to exploit information in...
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