NONQUIET PRIMARY USER DETECTING METHOD IN COGNITIVE RADIO SYSTEM

摘要

PURPOSE: A method for detecting a nonquiet primary user in a wireless recognition system is provided to reduce signal processing load by transmitting integrated inspection statistics. CONSTITUTION: A central controlling part obtains first inspection statistics and the distribution of the first inspection statistics from subsequent users(210) The first inspection statistics are integrated to calculate second inspection statistics and the distribution of the second inspection statistics(220). A threshold value is determined based on the distribution of the second inspection statistics(230). Wireless spectrum using state of a nonquiet primary user by comparing the threshold value and the second inspection statistics(240).