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updated twotonetest to take fft size as input

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This commit is contained in:
Mark Borgerding 2009-11-06 18:34:24 +00:00
parent 51e95088b3
commit 6f20be2ffb
1 changed files with 11 additions and 5 deletions
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16
test/twotonetest.c
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@ -64,18 +64,24 @@ double two_tone_test( int nfft, int bin1,int bin2)
return 10*log10(sigpow/(noisepow+1e-50) ); return 10*log10(sigpow/(noisepow+1e-50) );
} }
int main(void) int main(int argc,char ** argv)
{ {
int nfft = 4*2*2*3*5; int nfft = 4*2*2*3*5;
if (argc>1) nfft = atoi(argv[1]);
int i,j; int i,j;
double minsnr = 500; double minsnr = 500;
double maxsnr = -500; double maxsnr = -500;
double snr; double snr;
for (i=0;i<nfft/2;++i) { for (i=0;i<nfft/2;i+= (nfft>>4)+1) {
for (j=i;j<nfft/2;j+=7) { for (j=i;j<nfft/2;j+=(nfft>>4)+7) {
snr = two_tone_test(nfft,i,j); snr = two_tone_test(nfft,i,j);
if (snr<minsnr) minsnr=snr; if (snr<minsnr) {
if (snr>maxsnr) maxsnr=snr; minsnr=snr;
}
if (snr>maxsnr) {
maxsnr=snr;
}
} }
} }
snr = two_tone_test(nfft,nfft/2,nfft/2); snr = two_tone_test(nfft,nfft/2,nfft/2);