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In this paper, we study a hybrid fusion scheme for cooperative spectrum sensing (CSS) where we combine the hard decisions and soft decisions from cognitive radio (CR) users based on quality of their reporting channel (R-channel). The CR users transmit their hard decisions if the estimated R-channel between them and the fusion centre (FC) exceeds censoring threshold else they send soft decision, i...
The performance of cooperative spectrum sensing (CSS) with double threshold and censoring of cognitive radios (CRs) has been evaluated using maximal ratio combining (MRC) in the presence of Rayleigh faded sensing (S) and reporting (R) channels. Each CR senses the primary user through sensing channel and evaluates the energy of the received signal at its sensing channel input and performs double threshold...
In this paper a novel network architecture employing space diversity for Wireless Sensor Networks (WSN) is proposed. A simulation study has been carried out to evaluate performance of such WSN employing space diversity in terms of optimal transmit power. Optimal transmit power is the minimum power required to sustain the network connectivity while maintaining a predefined maximum tolerable Bit Error...
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