It causes the larger distortion in OFDM signal with comb-type pilots and introduces performance loss.
这会使带有梳状导频的OFDM信号发生更大的失真。 这有损系统的性能。
参考来源 - OFDM与SCWe use comb pilots to estimate the channel response, and propose a low-complexity discrete Fourier transform based MMSE channel estimator.
采用梳状导频进行信道估计，提出了一种低复杂度、基于离散傅立叶变换的最小均方误差的信估计算法。
参考来源 - OFDM·2,447,543篇论文数据，部分数据来源于NoteExpress
同时，针对梳状导频ls信道估计精度较低的情况，提出了通过时域低通滤波提高其估计精度的IPF - LS和IDF - LS改进算法。
Meanwhile, given the weak accuracy of LS algorithm, IPF-LS and IDF-LS are proposed which can enhance the accuracy of channel estimation by employing time-domain low-pass filter.
有一种直接基于DFT的信道估计方法利用均匀梳状分布的导频符号和离散傅立叶变换（DFT）完成信道估计。
The direct DFT based channel estimation method uses comb-type pilot symbol and discrete Fourier transform (DFT) to estimate the channel.
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