Cross-layer Rate Allocation in CDMA Systems with Imperfect Successive Interference Cancellation

摘要：

In CDMA systems with imperfect successive interference cancellation (SIC), the numbers of possible rate modes and decoding orders grow exponentially with the number of users. How to allocate rates in order to maximize the system utility is an NP problem, which involves the joint optimization of rate allocation at the link layer and decoding order adjustment at the physical layer, and thus the cross-layer rate allocation should be considered. This paper proposes an efficient cross-layer rate allocation algorithm for addressing this NP problem. The proposed algorithm can be decomposed into two layers: the inner layer examining method to adjust the decoding order and quickly examine the feasibility of rate modes; the outer layer updating scheme to efficiently update rate modes based on the particle swarm optimization (PSO) algorithm. We conduct extensive simulation experiments, and the numerical results show that our proposed algorithm outperforms the existing algorithms based on the greedy algorithm.

作者: Zhaorong Zhou Tianye Tang Zhongrong Wang Gang Feng Lemin Li

作者单位: School of Physics and Electronic Engineering, Sichuan Normal University, Chengdu, China Tieto Corporation, Chengdu, Sichuan, China School of Electronic Engineering, and Information Engineering, University of Electronic Science and National Laboratory of Communications, and Information Engineering, University of Electronic Science School of Communication and Information Engineering, University of Electronic Science and Technology

会议类型: 国际会议

会议名称: 2010 International Conference on Communications,Circuits and Systems(2010年通信、电路与系统国际会议)

会议地点: 成都

会议语种:英文

页码: 158-162

在线出版日期: 2010-06-28（万方平台首次上网日期，不代表论文的发表时间）