From 18cdd296772182452f68bb4a9fb203aece5f4bf6 Mon Sep 17 00:00:00 2001 From: drowe67 Date: Mon, 9 Apr 2018 04:21:16 +0000 Subject: [PATCH] added RF bandwidth git-svn-id: https://svn.code.sf.net/p/freetel/code@3458 01035d8c-6547-0410-b346-abe4f91aad63 --- codec2-dev/README_ofdm.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/codec2-dev/README_ofdm.txt b/codec2-dev/README_ofdm.txt index 1ae335a6..33176225 100644 --- a/codec2-dev/README_ofdm.txt +++ b/codec2-dev/README_ofdm.txt @@ -94,6 +94,7 @@ Payload bits/s: 700 Text bits/s...: 25 Unique Word...: 10 bits Carriers......: 17 +RF bandwidth..: 944 Hz Symbol period.: 18ms Cyclic Prefix.: 2ms (note 1) Pilot rate....: 1 in every 8 symbols @@ -112,5 +113,6 @@ Notes: 2/ Ideal SNR(3000) = Eb/No + 10*log10(Rb/B) = -1 + 10*log10(1400/3000) = -4.3 dB, - So we have about 2dB overhead for synchronisation and implementation loss. + So we have about 1.8dB overhead for synchronisation, implementation loss, + and the text channel. 3/ HF Multipath channel used for testing is two path, 1Hz Doppler, 1ms delay -- 2.25.1