为了研究OFDM信号在低压电力线上的传输情况，运用基于维格纳分布的时频分析方法对电力线上的信号进行分析。
The Wigner Ville time frequency analysis in conjunction with properly selected OFDM parameters is applied to evaluate the signal dynamic range performance over the low voltage power line network.
提出了一种效率很高的文档图像纠偏算法，即利用文档图像的水平投影值，得到水平投影值的维格纳-威利分布。
The efficient document image automatic de-skew algorithm is described We can get WVDs of horizontal histogram by projecting the document image.
提出了一种效率很高的文档图像纠偏算法，即利用文档图像的水平投影值，得到水平投影值的维格纳-威利分布。
The efficient document image automatic de-skew algorithm is described We can get WVDs of horizontal histogram by projecting the document image.
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