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一种优化的小波包码分多址系统信道估计算法

An Optimized Channel Estimation Algorithm for the WPDM-CDMA System
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摘要 在小波包码分多址(WPDM-CDMA)系统中,信道估计对于系统性能提升有着显著的影响,针对WPDM-CDMA系统最小二乘(LS)信道估计算法信道噪声很敏感问题,提出利用小波包阈值去噪对LS估计的信道响应值进行处理,以此来减少噪声影响.最后将此算法在3径Rayleigh信道模型下进行了测试,仿真结果表明该算法比传统的LS估计算法具有更好的性能,能够有效减小信道噪声的影响,提高信道估计精度. In the WPDM-CDM A （wavelet packet division multiplexing code division multiple access） sys-tem ,channel estimation plays an important role in its performance .To overcome the shortcoming of the least squares （LS） channel estimation algorithm being sensitive to noise ,we proposed a channel estimation method based on wavelet packet threshold denoising .Finally ,the optimized algorithm was tested in the 3-path Rayleigh fading channel model .Simulation results indicated that compared with the traditional LS es-timation ,the optimized algorithm gave a better performance and that it effectively reduced the influence of channel noise and improved the accuracy of channel estimation .
作者 李姣军 陈安志 苏理云 张婷
机构地区 重庆理工大学电子信息与自动化学院 重庆理工大学数理学院
出处 《西南大学学报（自然科学版）》 CAS CSCD 北大核心 2014年第10期164-169,共6页 Journal of Southwest University(Natural Science Edition)
基金 重庆市教委科学技术研究项目(KJ120829 KJ100810) 重庆市科委自然科学基金(cstc2013jcyjA00008)
关键词 小波包码分多址 信道估计 最小二乘 小波包阈值去噪 WPDM-CDMA channel estimation least square wavelet packet threshold denoising
分类号 TN914 [电子电信—通信与信息系统]
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参考文献13

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二级参考文献22

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西南大学学报（自然科学版）
2014年 第10期

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