[Discuss-gnuradio] sensed spectrum in dB???

[kaleem ahmad]

Hi All,

I am using USRP+RFX2400+SUSI 10.3.

Many people have already discussed "usrp_spectrum_sense.py" and I read all
those threads but unfortunately it didnt solve my problem and didnt help me
to understand the file completely, I have two questions in this file and
will be thankful if some one can help me.

First, what is in m.data??? 

First, what the following piece of code is doing??? Is it converting m.data
to power in dB?? If not please help me to find how this code can be changed
so that I get power dB at any given center frequency. 
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
power = 0
        for tap in mywindow:
            power += tap*tap
            
        c2mag = gr.complex_to_mag_squared(self.fft_size)

        # FIXME the log10 primitive is dog slow
        log = gr.nlog10_ff(10, self.fft_size,
                          
-20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size))
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Best Regards

Kaleem Ahmad
-- 
View this message in context: 
http://www.nabble.com/sensed-spectrum-in-dB----tp19607819p19607819.html
Sent from the GnuRadio mailing list archive at Nabble.com.