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一种基于延时信道状态信息的MIMO-OFDM系统自适应功率分配算法 被引量：1

An adaptive power allocation algorithm using delayed channel state information for MIMO-OFDM systems
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摘要 在基于正交频分复用的多输入多输出(multiple-input-multiple-output-orthogonal frequency divided multiplexing,MIMO-OFDM)系统中,适当的功率分配方案能够显著提高系统吞吐量,但是其复杂度往往较高。研究MIMOOFDM系统的自适应功率分配问题。以系统的和速率最大化为目标,根据延时的信道状态信息在所有空间子信道之间分配功率,同时满足各子信道的误码率约束与系统总功率约束。根据MIMO空间子信道的特点提出了一种复杂度很低的功率分配算法,并分析了算法复杂度。在IMT-2000信道中的仿真表明,提出算法的性能优于已有的次佳算法。 Appropriate power allocation schemes can increase the throughput considerably in MIMO （multiple-input-muhi- pie-output）-OFDM（ orthogonal frequency divided multiplexing） systems, but usually with highly computational complexity. The problem of adaptive power allocation is addressed for MIMO-OFDM systems in this paper. Aiming to maximize the sys- tem sum-rate, the overall power is allocated among spatial subchannels based on delayed channel state information; at the same time the total power constraint and bit-error-rate requirements are satisfied. A power allocation algorithm with low complexity is proposed on the basis of the characteristic of spatial subchannels. Then its computational complexity is ana- lyzed. Simulations in IMT-2000 channels demonstrate that the proposed algorithm outperforms existing sub-optimal algo- rithms.
作者 刘敏 曹张华
机构地区 南通大学电子信息学院
出处 《重庆邮电大学学报（自然科学版）》 CSCD 北大核心 2013年第6期743-747,761,共6页 Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金 国家自然科学基金(61071086) 江苏省高校自然科学基金(10KJB510020)~~
关键词 多输入多输出(MIMO) 正交频分复用(OFDM) 功率分配 信道状态信息 multiple-input-multiple-output （MIMO） orthogonal frequency divided multiplexing （OFDM） power alloca- tion delayed channel state information
分类号 TN929.5 [电子电信—通信与信息系统]
  • 相关文献

参考文献11

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二级参考文献12

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共引文献5

同被引文献12

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重庆邮电大学学报（自然科学版）
2013年 第6期

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