base channel meaning in Chinese
基极沟道
Examples
- Based on the above investigation an improved cyclic prefix based channel equalization algorithm is proposed . simulation results show it ' s feasible
对利用循环前缀进行信道估计的方法提出改进，提高了信道估计的性能，仿真结果证明这种改进是有效的。 - Two categories of pilot based channel estimation are examined in chapter 3 : ml criteria based and mmse criteria based . the performance and implementation complexity of these two methods are analyzed and compared
给出了最大似然估计及最小均方估计的信道响应估计表达式，分析和比较了这两种估计方法的性能，实现复杂度。 - This paper introduces a bispectrum - based channel estimation algorithm to improve the accuracy of the channel estimation at pilots and proposes an equalization method with the view of the reduction of the interpolation error
为了提高信道估计的精度，本文分别从提高导频处信道估计精度和减小插值误差的角度出发提出了基于导频双谱的信道估计算法和基于变换域滤波的插值方法。 - To overcome the affection of ici and awgn on the ls estimate of the transfer function at pilot tones , the proposed bispectrum - based channel estimation algorithm employ the suppression of ici and awgn components in the received pilot signals by bispectrum and then the accuracy of the estimation is improved . with the channel estimation at pilot tones , an efficient interpolation is necessary . an improved interpolation method based on transform - domain filtering is proposed , which employs dft / idft and filtering in a transform domain so that the effect of noise on the equalization is significantly reduced
针对导频处信道传递函数的ls估计中存在载波间干扰和加性高斯白噪声的影响的这一问题，本文将传统的ls估计方法与双谱相结合提出了一种新型的基于导频双谱信道估计算法，它利用了双谱对高斯噪声的抑制作用来减小接收到的导频信号中的载波间干扰和加性高斯白噪声的影响，从而提高了导频子载波上信道估计的精度。 - In this paper , we discuss the principle of mimo - ofdm system based on the introduction of fading channels . furthermore , the channel estimation technique in mimo - ofdm system is investigated , with the emphasis on training sequence - based and pilot - based channel estimation methods , and also several basic and improved algorithms are given respectively . finally , the analysis and comparison of these algorithms is made by computer simulation
本文在分析移动无线信道衰落特性的基础上，阐述了mimo - ofdm系统的基本原理，并围绕该系统中信道估计这一关键技术，深入研究了基于训练序列和基于导频符号的两类信道估计方法，给出几种相应的信道估计算法以及它们的改进算法，最后结合matlab仿真对这些算法的有效性和可行性进行了全面地分析与比较。