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Questions tagged [psk31]

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-4
votes
2answers
47 views

Transmission distance of PSK31 on various HF band [closed]

Would appreciate insight on efficiency of PSK31 on various HF band. Would 300 to 1000 km generally achievable if suitable band are chosen, according to day night and sun spot cycle using low power ...
1
vote
2answers
80 views

Can an SSB transmitter be used to transmit PSK?

Can a generic/typical analog SSB transmitter be used to send PSK modulated digital signals? If so, how does that work? How is a computer or DSP interfaced with an SSB transmitter? Line level ...
5
votes
1answer
82 views

Is the error rate for QPSK31 in a white noise channel worse than BPSK31?

I've read in a couple sources that in a channel consisting of only additive white Gaussian noise (AWGN), at low SNR, QPSK31 is actually worse than BPSK31. http://www.arrl.org/psk31-spec, probably ...
3
votes
2answers
84 views

How long are the PSK31 preamble and postamble?

The PSK31 specification by ARRL specifies: There is a preamble at the start of each transmission and a postamble at the end. The preamble is an idle signal of continuous zeroes, corresponding to ...
5
votes
2answers
326 views

Filtering for PSK31 demodulation

What's the ideal filter for PSK31 demodulation? That is, something that minimizes ISI, while having a narrow bandwidth to reject adjacent channels, while being reasonably matched? Most PSK modes use ...