From 904aa24fe183a32b56c5b77656d93a6b3e2933db Mon Sep 17 00:00:00 2001 From: drowe67 Date: Fri, 20 Apr 2018 01:31:01 +0000 Subject: [PATCH] FreeDV 1600 example, 10dB higher SNR git-svn-id: https://svn.code.sf.net/p/freetel/code@3514 01035d8c-6547-0410-b346-abe4f91aad63 --- codec2-dev/README_ofdm.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/codec2-dev/README_ofdm.txt b/codec2-dev/README_ofdm.txt index 0524eb39..f2cdbe32 100644 --- a/codec2-dev/README_ofdm.txt +++ b/codec2-dev/README_ofdm.txt @@ -95,8 +95,11 @@ Built as part of codec2-dev, see README for build instructions. 10. Run codec voice through simulated fast fading channel, just where it starts to fall over: - build_linux/src$ ./c2enc 700C ../../raw/ve9qrp.raw - --bitperchar | ./ofdm_mod - - --ldpc --interleave 16 | ./cohpsk_ch - - -22 --Fs 8000 -f -10 --fast | ./ofdm_demod - - --ldpc -v --interleave 16 | ./c2dec 700C - - --bitperchar | aplay -f S16 + build_linux/src$ ./c2enc 700C ../../raw/ve9qrp.raw - --bitperchar | ./ofdm_mod - - --ldpc --interleave 16 | ./cohpsk_ch - - -20 --Fs 8000 -f -10 --fast | ./ofdm_demod - - --ldpc -v --interleave 16 | ./c2dec 700C - - --bitperchar | aplay -f S16 +11. FreeDV 1600 on the same channel conditions, roughly same quality at 10dB higher SNR: + + build_linux/src$ ./freedv_tx 1600 ../../raw/ve9qrp_10s.raw - - | ./cohpsk_ch - - -30 --Fs 8000 -f -10 --fast | ./freedv_rx 1600 - - | aplay -f S16 Acceptance Tests ---------------- -- 2.25.1