CAJ | 학술논문

对现有的协作频谱感知方法进行了研究，针对大量用户的协作频谱感知增加系统的能耗以及协作过程中感知结果交换时间消耗，导致系统的延迟降低了系统吞吐量的问题，提出了通过优化感知用户的数量来降低能量消耗和最大化系统的吞吐量，进而达到最大化系统的能量利用效率的目的。通过运用二分法来得出复杂能效算法的N的最优值。理论分析和仿真结果表明，通过选择某个数量的认知用户参与协作频谱感知能提高系统的性能，同时能使系统的能量效率达到最大化。
대현유적협작빈보감지방법진행료연구，침대대량용호적협작빈보감지증가계통적능모이급협작과정중감지결과교환시간소모，도치계통적연지강저료계통탄토량적문제，제출료통과우화감지용호적수량래강저능량소모화최대화계통적탄토량，진이체도최대화계통적능량이용효솔적목적。통과운용이분법래득출복잡능효산법적N적최우치。이론분석화방진결과표명，통과선택모개수량적인지용호삼여협작빈보감지능제고계통적성능，동시능사계통적능량효솔체도최대화。
The existing CSS ( Cooperative Spectrum Sensing) method is studied, and aiming at the problem that the delay of system would result in the decrease of system throughput due to the increase of system en-ergy consumption caused by CSS of massive users and time consumption in the cooperative process of cog-nitive result exchange, a method to decrease the energy consumption and maximize system throughput by optimizing the amount of cognitive users is proposed, thus to maximize the utilization efficiency of system energy. The optimal N value of complex energy efficiency algorithm is acquired through bisection algo-rithm. Theoretical analysis and simulation results indicate that by selecting a number of cognitive users to participate in collaborative spectrum sensing, the system would be improved in performance while maxi-mized in energy efficiency.