| 快速QAM信号多模盲均衡算法 |
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| 引用本文： | 李进, 冯大政, 刘文娟. 快速QAM信号多模盲均衡算法[J]. 电子与信息学报, 2013, 35(2): 273-279. doi: 10.3724/SP.J.1146.2012.00609 |
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| 作者姓名： | 李进 冯大政 刘文娟 |
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| 作者单位： | 西安电子科技大学雷达信号处理国防科技重点实验室 西安710071 |
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| 基金项目： | 国家自然科学基金(60971111)资助课题 |
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| 摘 要： | 该文提出一种改进的QAM信号的多模盲均衡算法，其利用发送信号的实部(或虚部)信息构造代价函数。并且，提出了通过共轭梯度算法得到均衡器最优权的算法，该算法具有二次收敛性，与传统恒模算法和多模算法相比较，有非常快的收敛速度和非常少的计算量，并且均衡效果相当。最后，通过误码率和收敛速度分析该算法的可靠性和有效性，通过计算机仿真证明了该算法的有效性。
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| 关 键 词： | 无线通信 盲均衡 共轭梯度算法 恒模算法 多模算法 |
| 收稿时间： | 2012-05-18 |
| 修稿时间： | 2012-11-02 |
A Fast Multimodulus Blind Equalization Algorithm for QAM Signal |
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| Li Jin, Feng Da-Zheng, Liu Wen-Juan. A Fast Multimodulus Blind Equalization Algorithm for QAM Signal[J]. Journal of Electronics & Information Technology, 2013, 35(2): 273-279. doi: 10.3724/SP.J.1146.2012.00609 |
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| Authors: | Li Jin Feng Da-zheng Liu Wen-juan |
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| Affiliation: | National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China |
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| Abstract: | An improved multimodulus blind equalization algorithm for QAM signal is presented. The real part (imaginary part) information is used to construct cost function. Moreover, conjugate gradient algorithm is proposed to optimize the equalizer coefficients. With its equalization performance comparable to the conventional Constant Modulus Algorithm (CMA) and MultiModulus Algorithm (MMA), the proposed algorithm is quadratic convergent and has the advantages of better convergent performance and less computational complexity. Finally, the reliability and validity of this algorithm are analyzed by Bit Error Rate (BER) and rate of convergence. Its good performance is verified by simulation results. |
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| Keywords: | Wireless communication Blind equalization Conjugate gradient method Constant Modulus Algorithm (CMA) MultiModulus Algorithm (MMA) |
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