Devices, Systems, and Software including Signal Power Measuring and Methods and Software for Measuring Signal Power

A non-transitory computer readable medium storing instructions, the instructions comprising:

• one or more instructions which, when executed by one or more processors, cause the one or more processors to:
• receive an input signal, SIGin, over a time interval, dt, and having a signal length, sig_len, and power distributed over an input frequency spectrum;
• segmenting the input frequency spectrum into a plurality of frequency bins;
• calculate, for each frequency bin,
• a mixing frequency, f_mix, where
• f_mix=f_source−f_target, where
• f_target=a target intermediate frequency for signal in the frequency bin,
• f_source=a frequency associated with the frequency bin, and a mixing stream, cos_mix, where
• cos_mix=cos(0:rads_per_sample:rads_per_signal), and where
• rads_per_sample=f_mix*dt*2*π,
• rads_per_signal=rads_per_sample*(sig_len−1);
• generate, for each frequency bin, an intermediate frequency signal, sig_IF=SIGin*cos_mix;
• apply, for each frequency bin, an intermediate frequency (IF) bandpass filter, ifbpf, to sig_IF to generate a filtered IF signal, sig_IF_filtered;
• and
• calculate, for each frequency bin, a bin power, bin_power, of the filtered IF signal by summing the square of the amplitudes in filtered IF signal and dividing this sum by the time interval, dt;
• and
• compare the bin power, bin_power, in each frequency bin to at least one expected spectrum;
• and
• output the comparison of the bin power in each frequency bin to the at least one expected frequency spectrum.

A method of comparing signal spectra comprising:

• receive an input signal, SIGin, over a time interval, dt, from a signal collector, and having a signal length, sig_len, and power distributed over an input frequency spectrum;
• segmenting the input frequency spectrum into a plurality of frequency bins;
• calculating, for each frequency bin,
• a mixing frequency, f_mix, where
• f_mix=f_source−f_target, where
• f_target=a target intermediate frequency for signal in the frequency bin,
• f_source=a frequency associated with the frequency bin, and a mixing stream, cos_mix, where
• cos_mix=cos(0:rads_per_sample:rads_per_signal), and where
• rads_per_sample=f_mix*dt*2*π,
• rads_per_signal=rads_per_sample*(sig_len−1);
• generating, for each frequency bin, an intermediate frequency signal, sig_IF=SIGin*cos_mix;
• applying, for each frequency bin, an intermediate frequency (IF) bandpass filter, ifbpf, to sig_IF to generate a filtered IF signal, sig_IF_filtered;
• and
• calculating, for each frequency bin, a bin power, bin_power, of the filtered IF signal by summing the square of the amplitudes in filtered IF signal and dividing this sum by the time interval, dt;
• and
• comparing the bin power, bin_power, in each frequency bin to at least one expected spectrum;
• and
• outputting the comparison of the bin power in each frequency bin to the at least one expected frequency spectrum.