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This paper studies the spectrum occupancy in the frequency between 87.5 MHz and 108 MHz allocated for radio broadcasting in China. Through analyzing spectral measurement results, we can be identified the “spectrum holes”, which provide the possible candidates for CR operations, a promising solution to alleviating the heavy pressure on the scarce radio spectrum. Furthermore, it also plays the guiding...
In this paper, the multiuser linear cooperative spectrum sensing optimization problem in cognitive radio system where the primary user (PU) and cognitive radio (CR) employ multiple antennas is investigated. By optimizing the different weights assigned on the statistic of each CR given a targeted probability of false alarm, the cooperative spectrum sensing optimization focuses on maximizing the probability...
The cooperative spectrum sensing techniques in cognitive radio networks increase the energy consumption while improving the throughput of the system. The energy efficient techniques with sensing time optimization are considered in this paper. The optimization model is established, in which the sensing time is to be optimized to maximize the energy efficiency. Then, the golden section search algorithm...
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