воскресенье, 12 декабря 2010 г.

PSK: CIS-3000

CIS-3000
PSK-8, Br-3000.
PSK



Author: SergUA6
Band Width ~3400 Hz
Low Range ~600 Hz, in this example only!
Baud Rate 3000 Hz
n-Ary (PSK/MPSK) PSK-8
Carrier frequency ~2313 Hz, in this example only!
ACF Preamble ~ 85 ms
RX mode SSB


Sonograms
pic.1 Generall view

pic.2 General structure of the signal

Diagrams:

pic.3 8th harmonic

Pictures:

pic. 4 Phase constellation



pic.5 ACF preambles






CIS-3000 - With very high probability this signal has the Russian origin roots. More and more often there are signals which are leaving the limits of standard phone channel. This signal represents that kind of signals. The spectrum of this signal occupies 3400 Hertz. The maximum technical speed 3*3000 = 9000 bps.