| 一种分数间隔判决反馈盲均衡算法的研究 |
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| 引用本文： | 张银兵,赵俊渭,李金明,孙勇.一种分数间隔判决反馈盲均衡算法的研究[J].计算机仿真,2008,25(8). |
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| 作者姓名： | 张银兵 赵俊渭 李金明 孙勇 |
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| 作者单位： | 西北工业大学声学工程研究所,陕西,西安,710072 |
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| 摘 要： | 在无线通信系统中,为了抑制由多径效应产生的严重码间干扰(ISI),必须进行信道均衡.收敛速度和剩余码间干扰是衡量盲均衡算法性能优劣的重要指标,根据超指数迭代算法收敛速度快的特点,提出了一种基于分数间隔超指数迭代判决反馈盲均衡算法.同时,引入了二阶数字锁相环(DPLL2)技术以纠正载波相位旋转,并对算法的性能进行了计算机仿真.仿真结果表明,相对于传统的波特间隔常模判决反馈均衡算法(BSCMA-DFE)获得了较快的收敛速度和较小的剩余码间干扰,纠正了载波相位旋转,提高了通信系统的质量,具有一定的实用价值.
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| 关 键 词： | 盲均衡 超指数 判决反馈 分数间隔 锁相环 |
A Fractionally-Spaced Decision-Feedback Blind Equalization Algorithm |
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| ZHANG Yin-bing,ZHAO Jun-wei,LI Jin-ming,SUN Yong.A Fractionally-Spaced Decision-Feedback Blind Equalization Algorithm[J].Computer Simulation,2008,25(8). |
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| Authors: | ZHANG Yin-bing ZHAO Jun-wei LI Jin-ming SUN Yong |
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| Affiliation: | ZHANG Yin-bing,ZHAO Jun-wei,LI Jin-ming,SUN Yong(Institute of Acoustic Engineering,Northwestern Polytechnical University,Xi'an Shanxi 710072,China) |
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| Abstract: | In wireless communication systems,channel equalization technologies must be used to restrain the severe inter-symbol interference(ISI) caused by multi-path fading.Convergence speed and residual ISI are main performance criteria for these equalization algorithms.According to the good convergence ability of the super-exponential iteration(SEI) algorithm,a decision-feedback blind equalization algorithm based on fractionally-spaced SEI algorithm is proposed.Combined with second-order digital phase-locked loop(D... |
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| Keywords: | Blind equalization Super-exponential Decision-feedback Fractionally-spaced Phase-locked loop |
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