The frequency range of R-wave has been determined by use of frequency analysis.
并且根据频谱分析的方法确定了瑞利波的频率分布范围。
The theoretical analysis and experiment show this new scheme is effect at certain frequency range.
分析与实验表明，这种方案在一定的运行频率段是行之有效的。
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.
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。
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