Optimal Hard Decision for Cooperative Spectrum Sensing in Cognitive Radio Systems
무선 인지 시스템에서 협력 스펙트럼 센싱을 위한 최적화된 경판정 방식

So-Young Lee, Jin-Young Kim
2011 The Journal of Korean Institute of Electromagnetic Engineering and Science  
In this paper, we use hard decision method for cooperative spectrum sensing. Sensing performance adopting hard decision is lower than soft decision but system load is low and the process is relatively simple when the combining scheme is hard decision compared to soft decision. In order to improve sensing performance, we propose optimal hard decision method applying weight that is based on a probability of individual sensing. Unlike conventional hard decision, we try to improve sensing
more » ... e applying weight and show the performance of the proposed method from the simulation results and performance analysis. The signal of licensed user is OFDM signal and the wireless channel between a licensed user and CR systems is modeled as Gaussian channel.
doi:10.5515/kjkiees.2011.22.4.416 fatcat:kpxk6yodijbvzjwucfdaty5x4y