README

 lpsk31:
 =======
 lpsk31 is a ncurses-based Linux console application for Amateur Radio
 communications in the PSK31 digital mode. lpsk31 detects the carrier
 phase changes that make a PSK31-encoded character by reading audio
 samples from the DSP in the computer's sound card, connected to the
 output of a receiver. The audio signal is processed by a software phase
 detector which, for BPSK, detects '1' or '0' states ('0' signaled by a
 180 deg phase reversal) and the resulting stream of BPSK31-coded bits
 is decoded into ASCII characters for printing to the Receive window of
 lpsk31. In QPSK the carrier phase changes are processed by a
 soft-decision Viterbi decoder which provides error correction in bad
 receiving conditions.

 PLEASE NOTE that from version 0.8 the lpsk31rc file has changed slightly.
 Please read the version history in the HTML manual doc/lpsk31.html for
 more details.

 PLEASE READ the HTML manual doc/lpsk31.html for installation instructions.

 Neoklis Kyriazis  15 August 2002