CAJ | 학술논문

为降低时隙开销，提出一种增量式协作感知算法．在时隙1。若非授权用户获得的能量检测值大于上门限则全局判定授权用户存在，若小于检测门gg-N全局判定授权用户不存在；否则，进一步在时隙2与协作用户采用“与”融合规则协作感知．在满足目标虚警概率与检测概率的前提下．以最小化时隙开销为目标函数优化门限．模拟结果表明，与传统算法相比，当目标虚警概率与检测概率设为10％-90％且信噪比为10dB时．增量算法时隙开销可降低90％左右而感知性能仅降低3％左右．
위강저시극개소，제출일충증량식협작감지산법．재시극1。약비수권용호획득적능량검측치대우상문한칙전국판정수권용호존재，약소우검측문gg-N전국판정수권용호불존재；부칙，진일보재시극2여협작용호채용“여”융합규칙협작감지．재만족목표허경개솔여검측개솔적전제하．이최소화시극개소위목표함수우화문한．모의결과표명，여전통산법상비，당목표허경개솔여검측개솔설위10％-90％차신조비위10dB시．증량산법시극개소가강저90％좌우이감지성능부강저3％좌우．
To decrease the time slot consumption, an incremental cooperative spectrum sensing algorithm is proposed. In the first time slot, if the energy received by the secondary user is more than the upper threshold, the global judgment is that the primary user exists. And if it is less than the detection threshold, the global judgment is that the primary user doesn't exist. Otherwise, the secondary user and the cooperative user will sense the spectrum cooperatively with the "or" fusion rule. The object function is built for minimizing the time slot consumption with the limit of the detection probability and the false one to gain the optimal thresholds. Simulation results show that compared with the traditional algorithm the incremental one decreases about 90% of the time slot consumption but only about 3% of the sensing performance with the target detection probability of 10%, the false probability of 90% and the signal-to-noise ratio of 10 dB.