Changes between Version 7 and Version 8 of WARPLab/Examples/Spectrogram

Timestamp:

Jan 15, 2015, 2:12:22 PM (9 years ago)

Author:

chunter

Comment:

--

WARPLab/Examples/Spectrogram

@@ -37 +37 @@
 The left subplot of the above figure shows the entire spectrogram of the received waveform. The periodic "bursts" of energy from the time-series plot show up as horizontal lines of energy in the spectrogram. In this view, we can see that the periodic energy bursts are approximately 20 MHz wide. At 100 ms intervals, there is energy that is 20 MHz wide. These are 802.11 beacons from our commercial Wi-Fi access point on channel 6. You can also make out beacons on neighboring channels from other access points. These access points are further away and their energy delivered to our receiver is attenuated by path loss.
 
-The right subplot of the above figure shows the same data, but zoomed into a small 100 ms slice of the 3.35 s data. You can see that activity is recorded at a much finer granularity than is implied by the left subplot. There is much more data in the spectrogram than can be plotted at reasonable resolutions. In this example, the spectrogram is a matrix of size ({{{M = 11585}}}) x ({{{N = 11585}}}), and the figure being plotted has far fewer pixels.
+The right subplot of the above figure shows the same data, but zoomed into a small 100 ms slice of the 3.35 s data. You can see that activity is recorded at a much finer granularity than is implied by the left subplot. There is much more data in the spectrogram than can be plotted at reasonable resolutions. In this example, the spectrogram is a matrix of size ({{{M = 11585}}}) x ({{{N = 11585}}}) -- far more than the resolution of the final plot.
 
 === Case 2: Active Traffic Source ===