CQpub0 Mikami
The experiment using this program is introduced on "Interface" No.2, CQ publishing Co.,Ltd, 2015. 本プログラムを使った実験は，CQ出版社のインターフェース 2015年2月号で紹介しています．
Dependencies: DSProcessingIO mbed
Diff: IIR_Cascade.hpp
- Revision:
- 0:398107c96b1b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/IIR_Cascade.hpp Tue Jul 15 08:58:36 2014 +0000
@@ -0,0 +1,49 @@
+//--------------------------------------------------------------
+// IIR filter ---- Cascade structure
+// Copyright (c) 2014 MIKAMI, Naoki, 2014/07/15
+//--------------------------------------------------------------
+
+#ifndef IIR_CASCADE_HPP
+#define IIR_CASCADE_HPP
+
+#include "mbed.h"
+#include "Biquad.hpp"
+
+namespace Mikami
+{
+ // IIR filter -- Cascade structure
+ template<int order> class IirCascade
+ {
+ private:
+ Biquad hk_[order]; // Elements of cascade structure
+ const float G0_; // gain factor
+
+ IirCascade(const IirCascade&);
+ IirCascade& operator=(const IirCascade&);
+
+ public:
+ IirCascade(float g0, const Biquad::Coefs ck[])
+ : G0_(g0)
+ {
+ for (int k=0; k<order; k++)
+ hk_[k] = Biquad(ck[k]);
+ }
+
+ float Execute(float xn)
+ {
+ float yn = G0_*xn;
+ for (int k=0; k<order; k++)
+ yn = hk_[k].Execute(yn);
+
+ return yn;
+ }
+
+ void Clear()
+ {
+ for (int k=0; k<order; k++)
+ hk_[k].Clear();
+ }
+ };
+}
+#endif // IIR_CASCADE_HPP
+