HAPS通信中的低复杂度OFDMA资源分配策略  

A low complexity algorithm for optimum OFDMA resource allocation in HAPS communication

作　　者：李敏[1] 马东堂[1] 习勇[1] 常琳[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《电子技术应用》2009年第12期106-108,112,共4页Application of Electronic Technique

基　　金：国防科技重点实验室基金(51435050105KG0102)

摘　　要：针对配置于高空平台(HAPS)的OFDMA系统,研究了在平台功率受限情况下的资源分配问题。采用对偶理论,推导了在连续情况下,最小化发送功率时,OFDMA载波、功率、速率分配的最优解,同时利用统计近似法实现算法的实时配置。仿真结果表明,该算法性能与经典C.Y.Wong算法性能大致相同,而算法复杂度仅为线性复杂度,具有较强的实际应用价值。This paper investigates the resource allocation with power limitation in an OFDMA system used in HALE＇S. The optimum solutions of OFDMA subcarriers allocation, power allocation and rate allocation with minimized transmit power are derived by duality when the type of rate allocation is continuous. Moreover, the real time configuration of this algorithm is proposed by stochastic approximation. The numerical results show that the proposed algorithm, which has liner-time complexity, could achieve a similar performance with classical C,Y. Wong algorithm.

关 键 词：高空平台 OFDMA 资源分配 对偶理论 

分 类 号：TN919[电子电信—通信与信息系统]