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[Discuss-gnuradio] Received Signal Power question


From: Leo Yang
Subject: [Discuss-gnuradio] Received Signal Power question
Date: Mon, 24 Nov 2014 06:00:26 -0700 (MST)

 I found one modified example from usrp_spectrum_sense.py which mentioned the
power and noise calculation, could u plz help me figure out how it works? 

        for i_bin in range(bin_start, bin_stop):

            center_freq = m.center_freq
            freq = bin_freq(i_bin, center_freq)
            #noise_floor_db = -174 + 10*math.log10(tb.channel_bandwidth)
            noise_floor_db = 10*math.log10(min(m.data)/tb.usrp_rate)
            power_db = 10*math.log10(m.data[i_bin]/tb.usrp_rate)
-noise_floor_db




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