首页> 外文会议>Biomedical Circuits and Systems Conference, 2009. BioCAS 2009 >Waveform synthesis of multi-frequency sinusoids with 2nth primary harmonics based on Walsh functions
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Waveform synthesis of multi-frequency sinusoids with 2nth primary harmonics based on Walsh functions

机译:基于沃尔什函数的第2 n 次谐波的多频正弦波形合成

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Excitation source with multi-frequency sinusoids is of importance for bioimpedance spectroscopy (BIS) measurements. This paper describes a novel and simple method to synthesize multi-frequency sinusoids with 2nth primary harmonics based on Walsh functions. The synthesis mechanism is presented detailedly, and after analyzing the Fourier series expression of the periodic signal, the expression of the synthesized waveform in time domain is obtained. The simulation amplitude spectra and power spectra results comfirm that the energy of the synthesized signal is concentrated on the expected 2nth primary harmonics, and the bandwidth of the signal is also controllable, which foretell that the proposed waveform synthesis will be an ideal excitation source for spectral measurements. Furthermore, as a binary valued function, the waveform can be generated by FPGAs easisly and has a great value in BIS measurements.
机译:具有多频正弦波的激励源对于生物阻抗谱(BIS)测量非常重要。本文介绍了一种基于Walsh函数合成2次s次谐波的多频正弦波的新颖简单方法。详细介绍了其合成机理,并分析了周期信号的傅里叶级数表达式,得到了时域合成波形的表达式。仿真振幅谱和功率谱结果表明,合成信号的能量集中在预期的2 n 次谐波上,并且信号的带宽也是可控的,这预示了所提出的波形合成将是光谱测量的理想激发源。此外,作为二进制值函数,该波形可以轻松地由FPGA生成,并且在BIS测量中具有重要的价值。

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