GLOBE WIRELESS ADAPTIVE

32-CARRIER OFDM ARQ SYSTEM

(OFDM/QPSK MODULATED)

FFT SPECTRA

FFT-spectrum vs. time, frequency and signal intensity

FFT-spectrum vs. frequency and signal intensity (20-tone mode)

The various speedlevels of the modem show the following bandwidth:

12-tone mode	appx. 798 Hz
14-tone mode	appx. 900 Hz
16-tone mode	appx. 1036 Hz
18-tone mode	appx. 1163 Hz
20-tone mode	appx. 1280 Hz
22-tone mode	appx. 1416 Hz
24-tone mode	appx. 1550 Hz
26-tone mode	appx. 1676 Hz
28-tone mode	appx 1790 Hz
30-tone mode	appx. 1920 Hz

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