| CDMA时变色散信道的快速半盲辨识方法 |
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| 引用本文： | 吴波,易勇,蒋世奇,古天祥.CDMA时变色散信道的快速半盲辨识方法[J].信号处理,2007,23(3):441-443. |
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| 作者姓名： | 吴波 易勇 蒋世奇 古天祥 |
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| 作者单位： | 电子科技大学自动化工程学院,成都,610054 |
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| 摘 要： | 利用CDMA时变色散信道的离散正则模型,给出了一种新的信道快速盲辨识算法,首先使用时-频解相关RAKE接收机消除了多址干扰的影响,然后再利用解相关处理后信号的一阶统计量,实现对信道的辨识。和基于二阶统计量以及高阶统计量的盲辨识算法相比,该算法仅需要少量的导频符号,就可实现对信道的估计,具有更低的计算复杂度和更好的抗噪性能。仿真结果证明了算法的有效性。
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| 关 键 词： | CDMA时变色散信道 基展开模型 离散正则模型 盲辨识 时-频解相关RAKE接收机 |
| 修稿时间： | 2005年7月19日 |
A Fast Algorithm for Semi-Blind Identification for CDMA Time-varying Dispersive Channels |
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| Wu Bo,Yi Yong,Jiang Shiqi,Gu Tianxiang.A Fast Algorithm for Semi-Blind Identification for CDMA Time-varying Dispersive Channels[J].Signal Processing,2007,23(3):441-443. |
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| Authors: | Wu Bo Yi Yong Jiang Shiqi Gu Tianxiang |
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| Abstract: | A new semi-blind identification algorithm was proposed based on the discrete-time canonical model for CDMA time-va- rying dispersive channels.The channel is identified with the first-order statistics of the time-frequency decorrrelating Rake receiver out- put.The algorithm takes advantage of pilot symbols,it has lower complexity of computation and more effective under the condition of the low SNR than that of usual blind identification algorithms.Simulations are presented. |
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| Keywords: | CDMA time-varying dispersive channels basis expansion model discrete-time canonical model blind identification time-frequency decorrelating receiver |
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