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[1] Wang Junbo, Chen Ming, Wang Jiangzhou, et al. Adaptive resource allocationin downlink multi-user MC-CDMA systems [J]. Journal of Southeast University (English Edition), 2008, 24 (4): 402-406. [doi:10.3969/j.issn.1003-7985.2008.04.002]
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Adaptive resource allocationin downlink multi-user MC-CDMA systems()
下行多用户MC-CDMA系统中的自适应资源分配
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
24
Issue:
2008 4
Page:
402-406
Research Field:
Information and Communication Engineering
Publishing date:
2008-12-30

Info

Title:
Adaptive resource allocationin downlink multi-user MC-CDMA systems
下行多用户MC-CDMA系统中的自适应资源分配
Author(s):
Wang Junbo1;  2;  Chen Ming1;  Wang Jiangzhou1
1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
2College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
王俊波1;  2;  陈明1;  王江舟1
1东南大学移动通信国家重点实验室, 南京 210096; 2南京航空航天大学信息科学与技术学院, 南京 210016
Keywords:
code division multiple access(CDMA);  multi-carrier transmission;  multi-user;  channel allocation;  power allocation
CDMA;  多载波传输;  多用户;  信道分配;  功率分配
PACS:
TN929.5
DOI:
10.3969/j.issn.1003-7985.2008.04.002
Abstract:
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.
研究了多用户场景下多载波码分多址系统(MC-CDMA)的下行信道和功率分配, 并将吞吐最大化问题建模成一个混合整数优化问题.为了简化分析, 将问题分成2个低复杂度的子问题:功率分配和信道分配.这2个子问题可分别被一个次最优自适应功率分配算法(APA)和一个最优自适应信道分配算法(ACA)解决.通过联合APA和ACA算法, 进一步提出了一个自适应信道和功率的分配方案.仿真结果表明:与传统的均匀功率分配算法相比, 提出的APA算法更加适用于MC-CDMA系统;此外, 提出的自适应信道和功率分配方案可以显著地提高系统吞吐量性能.

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Memo

Memo:
Biographies: Wang Junbo(1979—), male, graduate;Chen Ming(corresponding author), male, doctor, professor, chenming@seu.edu.cn.
Foundation items: Major Project of the National Natural Science Foundation of China(No.60496311), the National High Technology Research and Development Program of China(863 Program)(No.2007AA01Z207), the Program for New Century Excellent Talents in University.
Citation: Wang Junbo, Chen Ming, Wang Jiangzhou.Adaptive resource allocation in downlink multi-user MC-CDMA systems[J].Journal of Southeast University(English Edition), 2008, 24(4):402-406.
Last Update: 2008-12-20