激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
12期
103-106
,共4页
功率分配%蛙跳算法%协作通信%多中继
功率分配%蛙跳算法%協作通信%多中繼
공솔분배%와도산법%협작통신%다중계
power allocation%frog leaping algorithm%cooperative communication%multi-relay
协作通信与直接通信相比能够显著地提高系统性能，功率分配是协作通信中的一个关键问题。为了获得合理的协作中继通信系统功率分配方案，提出一种基于改进蛙跳算法的多中继节点功率分配方法。首先对功率分配问题进行分析，将其转换为一个非线性优化问题，然后将青蛙表示为源节点，中继节点的功率，以平均信噪比作为青蛙的食物，并通过青蛙的信息交流和协作找到最优的功率分配方案，最后采用仿真对比实验对本文算法性能进行测试。仿真结果表明，相对于其它功率分配方法，改进蛙跳算法有效地提高了系统的信道容量，降低了中断概率，以较低的复杂度提高了系统的性能。
協作通信與直接通信相比能夠顯著地提高繫統性能，功率分配是協作通信中的一箇關鍵問題。為瞭穫得閤理的協作中繼通信繫統功率分配方案，提齣一種基于改進蛙跳算法的多中繼節點功率分配方法。首先對功率分配問題進行分析，將其轉換為一箇非線性優化問題，然後將青蛙錶示為源節點，中繼節點的功率，以平均信譟比作為青蛙的食物，併通過青蛙的信息交流和協作找到最優的功率分配方案，最後採用倣真對比實驗對本文算法性能進行測試。倣真結果錶明，相對于其它功率分配方法，改進蛙跳算法有效地提高瞭繫統的信道容量，降低瞭中斷概率，以較低的複雜度提高瞭繫統的性能。
협작통신여직접통신상비능구현저지제고계통성능，공솔분배시협작통신중적일개관건문제。위료획득합리적협작중계통신계통공솔분배방안，제출일충기우개진와도산법적다중계절점공솔분배방법。수선대공솔분배문제진행분석，장기전환위일개비선성우화문제，연후장청와표시위원절점，중계절점적공솔，이평균신조비작위청와적식물，병통과청와적신식교류화협작조도최우적공솔분배방안，최후채용방진대비실험대본문산법성능진행측시。방진결과표명，상대우기타공솔분배방법，개진와도산법유효지제고료계통적신도용량，강저료중단개솔，이교저적복잡도제고료계통적성능。
The cooperative communication can get better performance of systems than the direct transmission, how to allocate power is one of the most important issues in wireless cooperative diversity systems. In order to get good power al_location scheme for cooperative relay communication system, the paper puts forward a power allocation in multi-relay co_operative system based on improved frog leaping algorithm. Firstly, the power allocation problem is analysis to build a nonlinear optimization problem, and then the frog represents power source node, and relay nodes with an average SNR are taken as frog food, the optimal power allocation scheme through is found by the exchange of information and coopera_tion of the frog, finally the simulation experiment is carried out to test the performance. The results show that the modi_fied frog leaping algorithm can effectively increase the channel capacity and reduce the outage probability compared with other power allocation methods, so it uses lower complexity and improves the performance of the system.
