A Practical Semi Range-Based Localization Algorithm for Cognitive Radio

As the spatial dimension is exploited to further improve the spectrum utilization for cognitive radio (CR), the position of the primary user transmitter has become very useful information for the CR system. Most existing localization algorithms require transmitting power of the primary user, making them less practical. In this paper, we propose a practical semi range-based (PSRB) localization algorithm in which the primary user transmitting power is another parameter to estimate. Meanwhile, highly reliable decisions of the primary user occupancy status are made by virtue of cooperative spectrum sensing, so the possibility of detection of the sensing nodes are more accurate, leading to an improved performance of the algorithm. Simulation results show that the performance of the PSRB exceeds the iterative semi range-based algorithm.