From 5f1e837ef70b4bc70a808bfc9b00beac4f4f6f07 Mon Sep 17 00:00:00 2001 From: drowe67 Date: Sun, 3 Mar 2013 10:18:13 +0000 Subject: [PATCH] Variable Nc working for NC=14,16,20 git-svn-id: https://svn.code.sf.net/p/freetel/code@1185 01035d8c-6547-0410-b346-abe4f91aad63 --- codec2-dev/README_fdmdv.txt | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/codec2-dev/README_fdmdv.txt b/codec2-dev/README_fdmdv.txt index 324b410e..81c8c4df 100644 --- a/codec2-dev/README_fdmdv.txt +++ b/codec2-dev/README_fdmdv.txt @@ -6,8 +6,8 @@ Created March 2012 Introduction ------------ -A 1400 bit/s Frequency Division Multiplexed Digital Voice (FDMDV) modem -based on [1]. Used for digital audio over HF SSB. +A 1400 bit/s (nominal) Frequency Division Multiplexed Digital Voice +(FDMDV) modem based on [1]. Used for digital audio over HF SSB. The FDMDV modem was first implemented in GNU Octave, then ported to C. Algorithm development is generally easier in Octave, but for real time @@ -58,6 +58,10 @@ $ cd src For real time applications, the fdmdv.[ch] library includes functions to convert between 48 and 8 kHz sample rates. +6. Send 20 seconds at 2000 bit/s (20 carriers) to demod and count errors: + + $ ./fdmdv_get_test_bits - 20000 20 | ./fdmdv_mod - - 20 | ./fdmdv_demod - - 20 | ./fdmdv_put_test_bits - 20 + References ---------- -- 2.25.1