Improving the Spectral Efficiency of Multiuser OFDM System with V_BLAST Architecture by Adaptive Resource Allocation
This paper investigates the problem of adaptive resource allocation in the downlink of multiuser OFDM systems with V_BLAST architecture. In order to get a high spectral efficiency even in low SNR, we propose a novel low-complexity adaptive subchannel-bit allocation and power reallocation algorithm. The algorithm considers the users quality of service (QoS) requirements. Simulation results show that the proposed algorithm performs almost as well as the optimal solution. Moreover, higher spectral efficiency is achieved for larger number of users due to the multiuser diversity and the power reallocationven is used in low SNR field.
Xiao Xiao Guangxi Zhu Zhenping Hu Xiaofeng Lu
Department of Electronics& Information Engineering Huazhong University of Science&Technology Wuhan, P.R.China
国际会议
武汉
英文
189-192
2005-09-23（万方平台首次上网日期，不代表论文的发表时间）