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changed q1 and q2 according to the paper of P. Sysel and P. Rajmic
[mirrors/Programs.git]
/
c
/
goertzel
/
goertzel.c
diff --git
a/c/goertzel/goertzel.c
b/c/goertzel/goertzel.c
index 2cde63bfe2a015ef2ec398c99c3d69a1f958b3d5..19bfdf56eec479d9e372c6f1d3067241b0384fa2 100644
(file)
--- a/
c/goertzel/goertzel.c
+++ b/
c/goertzel/goertzel.c
@@
-29,8
+29,8
@@
float goertzel_mag(int numSamples,float TARGET_FREQUENCY,int SAMPLING_RATE, floa
// calculate the real and imaginary results
// scaling appropriately
// calculate the real and imaginary results
// scaling appropriately
- real = (q
1 - q2
* cosine) / scalingFactor;
- imag = (q
2
* sine) / scalingFactor;
+ real = (q
2 - q1
* cosine) / scalingFactor;
+ imag = (q
1
* sine) / scalingFactor;
magnitude = sqrtf(real*real + imag*imag);
return magnitude;
magnitude = sqrtf(real*real + imag*imag);
return magnitude;
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