Optimal Power Allocation for MIMO-OFDM Relaying Systems (1.Key Laboratory of Universal Wireless Communications, Ministry of Education,Beijing 100876,China;2.Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,China;3.Technology Platform,Nokia,Shanghai 200002,China)

ZHOU Ming-yu; LI Li-hua; WANG Hai-feng; ZHANG Ping

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Optimal Power Allocation for MIMO-OFDM Relaying Systems (1.Key Laboratory of Universal Wireless Communications, Ministry of Education,Beijing 100876,China;2.Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,China;3.Technology Platform,Nokia,Shanghai 200002,China)

更新时间：2025-07-16

- Optimal Power Allocation for MIMO-OFDM Relaying Systems (1.Key Laboratory of Universal Wireless Communications, Ministry of Education,Beijing 100876,China;2.Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,China;3.Technology Platform,Nokia,Shanghai 200002,China)
- Acta Electronica Sinica Vol. 37, Issue 1, Pages: 26-30(2009)
- 作者机构：
  
  1. 泛网无线通信教育部重点实验室(北京邮电大学),北京,100876
  2. 北京邮电大学无线新技术研究所,北京,100876
  3. 诺基亚技术平台,上海,200002
  4. 泛网无线通信教育部重点实验室(北京邮电大学)北京,100876
  5. 北京邮电大学无线新技术研究所北京,100876
  6. 诺基亚技术平台上海,200002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.2
- Published：2009
- 稿件说明：
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ZHOU Ming-yu, LI Li-hua, WANG Hai-feng, et al. Optimal Power Allocation for MIMO-OFDM Relaying Systems (1.Key Laboratory of Universal Wireless Communications, Ministry of Education,Beijing 100876,China;2.Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,China;3.Technology Platform,Nokia,Shanghai 200002,China)[J]. Acta Electronica Sinica, 2009, 37(1): 26-30.
DOI：

ZHOU Ming-yu, LI Li-hua, WANG Hai-feng, et al. Optimal Power Allocation for MIMO-OFDM Relaying Systems (1.Key Laboratory of Universal Wireless Communications, Ministry of Education,Beijing 100876,China;2.Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,China;3.Technology Platform,Nokia,Shanghai 200002,China)[J]. Acta Electronica Sinica, 2009, 37(1): 26-30. DOI：

摘要

针对两跳多入多出-正交频分复用(MIMO-OFDM)接力通信系统进行研究

每一跳传输采用奇异值分解将多载波上的MIMO信道转化为多个独立子通道

并提出最大化系统容量的最优功率分配问题

其中源节点和中继节点能够在多个子通道上进行联合功率分配;继而采用拉格朗日算法提出最优功率分配算法.由于最优算法涉及一元四次方程组

目前的数学方法不能提供其通解的闭合表达式

因此提出采用迭代过程实现最优功率分配的方法

为MIMO-OFDM接力系统提供了系统容量的上限.数值仿真结果显示

最优功率分配算法能大大提升系统容量

增强系统的传输能力.

Abstract

Two-hop multiple input multiple output- orthogonal frequency division multiplexing(MIMO-OFDM)relaying communication system is researched.Singular value decomposition is employed to transform MIMO channel on multiple sub-carriers into multiple independent sub-channels in each hop transmission

and the optimal power allocation problem is introduced to maximize system capacity.The power can be allocated jointly on multiple sub-channels at both the source node and relay node

and further

the optimal allocation algorithm is proposed with aid of Lagrange algorithm.Since the optimal algorithm is related to quartic equations and mathematical methods nowadays cannot provide its closed form for the general solution

a method is proposed to utilize iteration courses to realize optimal power allocation

and it provides the upper limit for MIMO-OFDM relaying system capacity.Numeral simulation results show that the optimal power allocation algorithm can improve the system capacity and enhance the transmission ability greatly.

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