Set default Kaiser alpha factor at pi

2020-02-08 18:24:34 +01:00 · 2020-02-08 18:24:34 +01:00 · 07db5c0f80
parent 8a5daee1b8
commit 07db5c0f80
1 changed files with 1 additions and 1 deletions
--- a/sdrbase/dsp/fftwindow.cpp
+++ b/sdrbase/dsp/fftwindow.cpp
@ -19,7 +19,7 @@
 #include "dsp/fftwindow.h"

 FFTWindow::FFTWindow() :
-	m_kaiserAlpha(2.15) // beta = 6.76 first sidelobe at -70dB
+	m_kaiserAlpha(M_PI) // first sidelobe at < -70dB
 {
 	m_kaiserI0Alpha = zeroethOrderBessel(m_kaiserAlpha);
 }