gistfile1.py

from pyqtgraph.Qt import QtCore, QtGui
import pyqtgraph as pg
import scipy.ndimage as ndi
import numpy as np
from scipy import signal
import bladeRF

device = bladeRF.Device()
device.rx.config(bladeRF.FORMAT_SC16_Q12, 64, 16384, 16, 3500)
device.rx.enabled = True

#device.rx.frequency = 462562500
device.rx.frequency = 870000000
#device.rx.frequency = 2437000000
device.rx.bandwidth = 28000000
device.rx.sample_rate = 40000000

device.lna_gain = bladeRF.LNA_GAIN_MAX
device.rx.vga1 = 20
device.rx.vga2 = 18

Nf = 512     # No. of frames
Ns = 1024    # Signal length

app = QtGui.QApplication([])

Arx = np.zeros([Nf, Ns])
win = pg.image(Arx)
win.view.setAspectLocked()

num_samples = 2**19

def update():
    global Arx
    Arx = np.roll(Arx, 1, axis=0)
    samples = bladeRF.samples_to_narray(device.rx(num_samples), num_samples)
    f, fft = signal.periodogram(samples, window='flattop', scaling='spectrum', nfft=1024)
    fft = 10*np.log10(fft)
    Arx[0] = fft
    win.setImage(Arx.T, autoRange=False)

timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(30)

if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()