非采样间隔信道的LTE上行信道估计新方法  

New channel estimation method for LTE uplink system on non-sample-spaced channel

作　　者：高华洁[1] 李学斌[1] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029

出　　处：《现代电子技术》2012年第19期15-19,共5页Modern Electronics Technique

摘　　要：为了解决非采样间隔信道的冲激响应能量泄漏和低信噪比下高斯白噪声的干扰问题,采用一种将小波去噪技术与改进的基于DFT的估计方法相结合的LTE上行系统信道估计的新方法。仿真结果表明,基于部分加权估计的时间窗函数的正确选择能有效地改善原有方法在高信噪比下的地板效应,与小波去噪结合能有效提高低信噪比下的信道估计性能。To solve the problem of the energy leakage of channel impulse response on non-sample-spaced channel and the interference of white Gaussian noise with low signal to noise ratio （SNR）, a new method for channel estimation in the LTE uplink system is proposed. The method combines wavelet denoising with an improved algorithm for the conventional DFT- based channel estimators. The simulation results show that based on the right choice of partial weight estimation of the time window, the method can effectively mitigate the error floor in the high SNR, and the combination with wavelet denoising can effectively improve the estimation performance of channel with low SNR.

关 键 词：单载波频分多址接入 信道估计 非采样间隔信道 地板效应 离散傅里叶变换 小波变换 

分 类 号：TN929.534[电子电信—通信与信息系统]