Fixed and dynamic threshold selection criteria in energy detection for cognitive radio communication systems

Spectrum sensing is a key step in cognitive radio communication systems. The probability of detection and probability of false-alarm are two crucial performance parameters in spectrum sensing. In this paper, we have presented the effect of selection of fixed and dynamic threshold scheme of energy detection technique on various spectrum sensing performance parameters such as probability of detection, probability of false-alarm, and probability of error, considering the constant noise variance in the channel. In addition to this, we have also computed the minimum value of time-bandwidth product when the noise variance is constant or variable in the channel.