计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
16期
100-103
,共4页
认知无线电%认知用户%差分进化算法%频谱分配%系统效益
認知無線電%認知用戶%差分進化算法%頻譜分配%繫統效益
인지무선전%인지용호%차분진화산법%빈보분배%계통효익
cognitive radio%secondary user%DE algorithm%spectrum allocation%system utility
针对认知无线电系统中认知用户分配可用频谱问题，提出基于差分进化算法的认知无线电频谱分配算法。利用差分算法设置参数少、寻优能力强、不易于陷入局部最优等特点，得到可以使认知用户平均系统效益最大化的频谱分配方案。仿真结果表明，提出的算法不仅提高了用户平均系统效益，而且缩短了运行时间，提高了频谱分配效率。
針對認知無線電繫統中認知用戶分配可用頻譜問題，提齣基于差分進化算法的認知無線電頻譜分配算法。利用差分算法設置參數少、尋優能力彊、不易于陷入跼部最優等特點，得到可以使認知用戶平均繫統效益最大化的頻譜分配方案。倣真結果錶明，提齣的算法不僅提高瞭用戶平均繫統效益，而且縮短瞭運行時間，提高瞭頻譜分配效率。
침대인지무선전계통중인지용호분배가용빈보문제，제출기우차분진화산법적인지무선전빈보분배산법。이용차분산법설치삼수소、심우능력강、불역우함입국부최우등특점，득도가이사인지용호평균계통효익최대화적빈보분배방안。방진결과표명，제출적산법불부제고료용호평균계통효익，이차축단료운행시간，제고료빈보분배효솔。
According to the problem of spectrum allocation for secondary users in cognitive radio system, this paper puts forward the spectrum allocation algorithm based on the differential evolution algorithm. With less parameters, strong ability of finding global optimization solution and avoiding getting into local optimality of the differential evolution algorithm. The spectrum allocation scheme is got which can maximize the mean system utility. The simulation results show that the algorithm in this paper not only increases mean system utility of secondary users but also shortens running time and improves the efficiency of spectrum allocation.
