From eb6ace3cc39561a8d8c55d481311a8e8934951ee Mon Sep 17 00:00:00 2001 From: Roman Zeyde Date: Wed, 4 Mar 2015 17:10:24 +0200 Subject: [PATCH] README: fix carrier and audio sampling rate info. --- README.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/README.rst b/README.rst index 5f3c02f..20766c4 100644 --- a/README.rst +++ b/README.rst @@ -31,7 +31,7 @@ This program can be used to transmit a specified file between 2 computers, using a simple audio cable (for better SNR and higher speeds) or a simple headset, allowing true air-gapped communication (via a speaker and a microphone). -The sender modulates an input binary data file into an 32kHz audio, +The sender modulates an input binary data file into an audio signal, which is played to the sound card. The receiver side records the transmitted audio, @@ -43,10 +43,10 @@ receiving microphone. The modem is using OFDM over an audio cable with the following parameters: -- Sampling rate: 32 kHz +- Sampling rate: 8/16/32 kHz - Baud rate: 1 kHz - Symbol modulation: BPSK, 4-PSK, 16-QAM ,64-QAM, 256-QAM -- Carriers: 2-11 kHz +- Carriers: 2-11 kHz (up to ten carriers) This way, modem may achieve 80kbps bitrate = 10 kB/s (for best SNR).