Adaptive resource allocation in downlink multi-user MC-CDMA systems

作者：Wang Junbo; Chen Ming; Wang Jiangzhou

来源：Journal of Southeast University (english Edition), 2008, 24(4): 402-406.

• Channel allocation
• Code division multiple access (CDMA)
• Multi-carrier transmission
• Multi-user
• Power allocation

The joint channel and power allocation in the downlink transmission of multi-user multi-carrier code division multiple access (MC-CDMA) systems are investigated and the throughput maximization problem is considered as a mixed integer optimization problem. For simplicity of analysis, the problem is divided into two less complex sub-problems: Power allocation and channel allocation, which can be solved by a suboptimal adaptive power allocation (APA) algorithm and an optimal adaptive channel allocation (ACA) algorithm, respectively. By combining APA and ACA algorithms, an adaptive channel and power allocation scheme is proposed. The numerical results show that the proposed APA algorithm is more suitable for MC-CDMA systems than the conventional equal power allocation algorithm, and that the proposed channel and power allocation scheme can significantly improve the system throughput performance.

• 出版日期2008
• 单位东南大学