diff options
Diffstat (limited to 'dpd/show_spectrum.py')
| -rwxr-xr-x | dpd/show_spectrum.py | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/dpd/show_spectrum.py b/dpd/show_spectrum.py index b9e0180..83ecd8d 100755 --- a/dpd/show_spectrum.py +++ b/dpd/show_spectrum.py @@ -98,11 +98,7 @@ def get_samples(port, num_samps_to_request): return (tx_ts, txframe, rx_ts, rxframe) -sampling_rate = 8192000 -fft_size = 4096 -freqs = np.fft.fftshift(np.fft.fftfreq(fft_size, d=1./sampling_rate)) - -def plot_spectrum_once(port, num_samps_to_request): +def get_spectrum(port, num_samps_to_request): tx_ts, txframe, rx_ts, rxframe = get_samples(port, num_samps_to_request) print("Received {} & {} frames at {} and {}".format( @@ -114,7 +110,15 @@ def plot_spectrum_once(port, num_samps_to_request): rx_spectrum = np.fft.fftshift(np.fft.fft(rxframe, fft_size)) rx_power = 20*np.log10(np.abs(rx_spectrum)) + return tx_power, rx_power + + +sampling_rate = 8192000 +fft_size = 4096 +freqs = np.fft.fftshift(np.fft.fftfreq(fft_size, d=1./sampling_rate)) +def plot_spectrum_once(port, num_samps_to_request): + tx_power, rx_power = get_spectrum(port, num_samps_to_request) fig = pp.figure() fig.suptitle("TX and RX spectrum") @@ -138,17 +142,7 @@ def plot_spectrum_animated(port, num_samps_to_request): axes[1].set_ylim(-60, 40) def update(frame): - tx_ts, txframe, rx_ts, rxframe = get_samples(port, num_samps_to_request) - - print("Received {} & {} frames at {} and {}".format( - len(txframe), len(rxframe), tx_ts, rx_ts)) - - print("Calculate TX and RX spectrum assuming 8192000 samples per second") - tx_spectrum = np.fft.fftshift(np.fft.fft(txframe, fft_size)) - tx_power = 20*np.log10(np.abs(tx_spectrum)) - - rx_spectrum = np.fft.fftshift(np.fft.fft(rxframe, fft_size)) - rx_power = 20*np.log10(np.abs(rx_spectrum)) + tx_power, rx_power = get_spectrum(port, num_samps_to_request) lines[0].set_ydata(tx_power) lines[1].set_ydata(rx_power) |