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PSK31
PSK31
is a form of modulation (or "mode") that offers a new and higher level
of performance in conversational communications (keyboard-to-keyboard)
that "hams" (amateur radio operators) can enjoy. And it's been
made instantly usable by all of us, due in part to the proliferation
of the personal computer, and in part to the superb and generous efforts
of some very talented ham/programmers.
PSK31
is a new digital mode. It was designed by Peter G3PLX, that betters
SLOWBPSK, an idea and implementation of Pawel SP9VRC amd is based
on the RTTY mode of operation. It is useful for live keyboard to keyboard
QSO that works at 31.25 bauds, that uses varicode caracter coding
what gives 50wpm. It is easy to use and monitor, which gives very
good copy under low Eb/No numbers and is thus suitable for QRP. Instead
of using FSK or on/off keying it uses BPSK or QPSK with a Viterbi
decoder, that is available for free for many platforms, including
Windows (c) with SoundBlaster type Soundcard, and uses advanced DSP
and narrow band (31 Hz!!) techniques.
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