机构地区: 北京邮电大学电信工程学院信息与通信工程学院
出 处: 《北京邮电大学学报》 2005年第5期106-109,共4页
摘 要: 研究了码分多址(CDMA)系统中下行联合功率速率分配问题.利用效用函数作为资源分配策略的优化目标,提出了双环结构的功率速率分配算法,即外环在保证用户公平性要求条件下动态调整传输速率;在外环控制速率分配的基础上,内环系统根据系统效用最大化原则分配功率;同时外环速率控制要受到内环功率分配结果的影响.算法在保证不同用户间公平性的基础上,提高了系统资源利用率. The joint power and data rate allocation in code division multiple access (CDMA) systems was studied. Using utility function as the optimization objective of resource allocation policy, a novel dual-loop resource allocation algorithm was presented. Data rate was adjusted by the outer loop to meet fairness among users. Based on the rate allocation achieved by the outer loop, the inner loop allocated power to guarantee the maximum system utility. Outer loop should be controlled by inner loop. The fairness among different users is guaranteed and the system resource utilization is improved with this algorithm.