Spectrum availability is becoming scarce due to the rise of number of users
and rapid development in wireless environment. Cognitive radio (CR) is an
intelligent radio system which uses its in-built technology to use the vacant
spectrum holes for the use of another service provider. In this paper,
genetic algorithm (GA) is used for the best possible space allocation to
cognitive radio in the spectrum available. For spectrum reuse, two criteria
have to be fulfilled - 1) probability of detection has to be maximized, and
2) probability of false alarm should be minimized. It is found that with the
help of genetic algorithm the optimized result is better than without using
genetic algorithm. It is necessary that the secondary user should vacate the
spectrum in use when licensed users are demanding and detecting the primary
users accurately by the cognitive radio. Here, bit error rate (BER) is
minimized for better spectrum sensing purpose using GA.
Database access strategy for TV White Space cognitive radio networks
