c# lms滤波算法代码
时间: 2023-09-11 18:09:37 浏览: 42
当涉及到LMS(最小均方)滤波算法的C#代码时,以下是一个简单的示例:
```csharp
public class LMSFilter
{
private int filterOrder; // 滤波器阶数
private double[] coefficients; // 滤波器系数
private double[] buffer; // 输入信号缓冲区
public LMSFilter(int order)
{
filterOrder = order;
coefficients = new double[filterOrder];
buffer = new double[filterOrder];
}
public void Train(double[] referenceSignal, double[] desiredSignal, double stepSize)
{
int signalLength = referenceSignal.Length;
for (int n = 0; n < signalLength; n++)
{
double filteredOutput = 0;
// 更新输入信号缓冲区
for (int i = filterOrder - 1; i > 0; i--)
{
buffer[i] = buffer[i - 1];
}
buffer[0] = referenceSignal[n];
// 计算滤波器输出
for (int i = 0; i < filterOrder; i++)
{
filteredOutput += coefficients[i] * buffer[i];
}
// 根据LMS算法更新滤波器系数
for (int i = 0; i < filterOrder; i++)
{
coefficients[i] += stepSize * (desiredSignal[n] - filteredOutput) * buffer[i];
}
}
}
public double Apply(double inputSignal)
{
double filteredOutput = 0;
// 更新输入信号缓冲区
for (int i = filterOrder - 1; i > 0; i--)
{
buffer[i] = buffer[i - 1];
}
buffer[0] = inputSignal;
// 计算滤波器输出
for (int i = 0; i < filterOrder; i++)
{
filteredOutput += coefficients[i] * buffer[i];
}
return filteredOutput;
}
}
```
在使用该类时,你可以按照以下步骤进行操作:
```csharp
// 创建LMS滤波器实例
LMSFilter filter = new LMSFilter(filterOrder);
// 训练滤波器
filter.Train(referenceSignal, desiredSignal, stepSize);
// 应用滤波器
double filteredOutput = filter.Apply(inputSignal);
```
上述代码中的`referenceSignal`是输入信号,`desiredSignal`是期望信号,`stepSize`是步长参数,`inputSignal`是待滤波的信号。你可以根据需要自行调整这些参数。