/**
* 零相位延迟FIR滤波
* @param:
* dataSerial 输入波形
* samplingFreq 采样率 Hz
* lowCutOff 低截至频率 Hz
* highCutOff 高截至频率 Hz
*
* @return FIRResult 滤波后数据
*/
public double[] ZeroPhaseFIR(double[] dataSerial, double samplingFreq, double lowCutOff, double highCutOff)
{
IList <double> coef = new List <double>();
double[] hf = FirCoefficients.BandPass(samplingFreq, lowCutOff, highCutOff, 64); //获得滤波系数
foreach (double number in hf)
{
coef.Add(number);
}
OnlineFirFilter filter = new OnlineFirFilter(coef);
double[] FIRResult = filter.ProcessSamples(dataSerial); //正向滤波
FIRResult = filter.ProcessSamples(FIRResult.Reverse().ToArray()); //反向滤波
FIRResult = FIRResult.Reverse().ToArray(); //反转
return(FIRResult);
}
protected override void Execute()
{
_filteredDatas.Clear();
OnlineFirFilter filter = _configForm.Filter;
for (int i = 0; i < this.DataBuf.Count; i++)
{
double[] showData = this.DataBuf[i];
_filteredDatas.AddRange(filter.ProcessSamples(showData));
}
}
protected override void Execute()
{
_filteredDatas.Clear();
int samplesPerView = GlobalInfo.SamplesInChart;
// if (null == _filteredWave || _filteredWave.Length != samplesPerView)
// {
// _filteredWave = new double[samplesPerView];
// }
OnlineFirFilter filter = _configForm.Filter;
for (int i = 0; i < GlobalInfo.EnableChannelCount; i++)
{
double[] showData = DataBuf.GetRange(i * samplesPerView, samplesPerView).ToArray();
_filteredDatas.AddRange(filter.ProcessSamples(showData));
}
}