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论文:2013,Vol:31,Issue(2):229-232 |
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引用本文： |
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郭淑霞, 宋阳. 基于ACM系统的LC-MMSE信道估计算法研究[J]. 西北工业大学 |
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Guo Shuxia, Song Yang. Exploring Low-Complexity Minimum Mean Square Error (LC-MMSE) Algorithm for Channel Estimation in Adaptive Coding and Modulation (ACM) System[J]. Northwestern polytechnical university |
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| 基于ACM系统的LC-MMSE信道估计算法研究 |
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| 郭淑霞, 宋阳 |
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| 西北工业大学 无人机特种技术重点实验室, 陕西 西安 710065 |
| 摘要: |
| 论述了应用于ACM系统的信道估计技术,针对MMSE信道估计算法复杂性高、运算量大的问题,论文提出了一种低复杂度的LC-MMSE算法,并在给定的多径衰落信道下进行了仿真,仿真结果表明:LC-MMSE算法与MMSE算法相比,在均方误差为10-3时性能接近,且算法复杂性相对较低;与SVD算法相比,具有1～2 dB的性能增益,有效地提高了MMSE算法在实际中的应用。 |
| 关键词:
自适应编码与调制
信道估计算法
最小均方误差估计
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| Exploring Low-Complexity Minimum Mean Square Error (LC-MMSE) Algorithm for Channel Estimation in Adaptive Coding and Modulation (ACM) System |
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| Guo Shuxia, Song Yang |
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| Science and Technology on UAV Laboratory,Northwestern Polytechnical University,Xi'an 710065,China |
| Abstract: |
| It is well known that channel estimation is important for overall performance of an ACM system. There-fore,we propose the LC-MMSE algorithm and apply it to the ACM system. Through optimizing the parameters inthe Q matrix,the LC-MMSE algorithm reduces the computational complexity of the MMSE algorithm on the precon-dition that its performance is not harmed. Then we explain how to simplify the algorithm and why it can reduce thecomputational complexity. Finally,we simulate the LC-MMSE algorithm with a given multipath fading channel.The simulation results,presented in Fig. 2 and 3 and their comparison with other algorithms show preliminarilythat: (1) our LC-MMSE algorithm is better than the singular value decomposition(SVD) algorithm and the linearminimum mean square error(LMMSE) algorithm; (2) when mean square error(MSE) is 10－3 ,the signal to noiseratio(SNR) of the LC-MMSE algorithm is 1 to 2 dB lower than that of the SVD algorithm. Thus the LC-MMSE al-gorithm greatly reduces its computational complexity. |
| Key words:
algorithms
channel estimation
adaptive coding and modulation(ACM)
minimum mean square error(MMSE)
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| 收稿日期: 2012-05-23
修回日期:
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| DOI: |
| 基金项目: 2011航天支撑基金资助 |
| 通讯作者:
Email： |
| 作者简介: 郭淑霞(1965-),女,西北工业大学副教授,主要从事无线通信、软件无线电及信道编码等研究。
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| 作者相关文章 |
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| 郭淑霞 在本刊中的所有文章 |
| 宋阳 在本刊中的所有文章 |
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