sdr_helper¶
Subpackages¶
Submodules¶
Package Contents¶
Functions¶
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function disdata = discrim(x) |
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Decimate complex baseband input by 10 |
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Stereo demod from complex baseband at sampling rate fs. |
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Mark Wickert, April 2014 |
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Estimate the BEP of the data bits recovered |
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Save a complex signal vector to a wav file for compact binary |
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Return a complex signal vector from a wav file that was used to store |
- sdr_helper.discrim(x)¶
function disdata = discrim(x) where x is an angle modulated signal in complex baseband form.
Mark Wickert
- sdr_helper.mono_fm(x, fs=2400000.0, file_name='test.wav')¶
Decimate complex baseband input by 10 Design 1st decimation lowpass filter (f_c = 200 KHz)
- sdr_helper.stereo_fm(x, fs=2400000.0, file_name='test.wav')¶
Stereo demod from complex baseband at sampling rate fs. Assume fs is 2400 ksps
Mark Wickert July 2017
- sdr_helper.wide_psd(tc, f_start, f_stop, fs=2400000.0, rho=0.6)¶
- sdr_helper.pilot_pll(xr, fq, fs, loop_type, bn, zeta)¶
Mark Wickert, April 2014
- sdr_helper.sccs_bit_sync(y, ns)¶
Symbol synchronization algorithm using SCCS¶
y = baseband NRZ data waveform
Ns = nominal number of samples per symbol
Reworked from ECE 5675 Project Translated from m-code version Mark Wickert April 2014
- sdr_helper.fsk_bep(rx_data, m, flip)¶
Estimate the BEP of the data bits recovered by the RTL-SDR Based FSK Receiver.
The reference m-sequence generated in Python was found to produce sequences running in the opposite direction relative to the m-sequences generated by the mbed. To allow error detection the reference m-sequence is flipped.
Mark Wickert April 2014
- sdr_helper.to_wav_stereo(filename, rate, x_l, x_r=None)¶
- sdr_helper.complex2wav(filename, rate, x)¶
Save a complex signal vector to a wav file for compact binary storage of 16-bit signal samples. The wav left and right channels are used to save real (I) and imaginary (Q) values. The rate is just a convent way of documenting the original signal sample rate.
complex2wav(filename,rate,x)
Mark Wickert April 2014
- sdr_helper.wav2complex(filename)¶
Return a complex signal vector from a wav file that was used to store the real (I) and imaginary (Q) values of a complex signal ndarray. The rate is included as means of recalling the original signal sample rate.
fs,x = wav2complex(filename)
Mark Wickert April 2014