Comparison of radiometry and modified periodogram spectrum detection in wireless radio networks

The spectrum sensing is a quite important part in cognitive radio. This paper discusses energy sensing, the common spectrum sensing algorithm in cognitive radio, as well as some cooperative algorithms such as AND, OR rule. Also some modified periodogram methods have been investigated and simulated, moreover these various methods of detection of signal simulated by specifying their advantages and their drawbacks. Our simulations shows that the energy detector is so easy to implement and is good when there is no knowledge of secondary users. Besides simulation about modified periodogram shows that there are differences in detection of signals by using different types of filtering and windowing. Finally, sensing features of these current methods are described.