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readme update
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jontio committed Jan 10, 2016
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Expand Up @@ -8,9 +8,11 @@ Such signals are typically around 1.5Ghz and can be received with a simple low g

SatCom ACARS signals are basically MSK like so the demodulator was forked from [JMSK]. The demodulator implements a coherent MSK demodulator type as seen at http://jontio.zapto.org/hda1/msk-demodulation2.html.

The demodulator uses the technique that treats the signal similar to [OQPSK] but with sine wave transitions rather than rectangular transitions. The BER (*Bit Error Rate*) versus EbNo (*Energy per bit to Noise power density*) performance in the presence of AWGN (*Additive White Gaussian Noise*) is the same as coherently demodulated differentially encoded [BPSK]. While designed for MSK it will also demodulate [GMSK] and some types of [BPSK]. The signal is supplied via the audio input of the computer’s soundcard.
The 600 and 1200 bps demodulator uses the technique that treats the signal similar to [OQPSK] but with sine wave transitions rather than rectangular transitions. The BER (*Bit Error Rate*) versus EbNo (*Energy per bit to Noise power density*) performance in the presence of AWGN (*Additive White Gaussian Noise*) is the same as coherently demodulated differentially encoded [BPSK]. While designed for MSK it will also demodulate [GMSK] and some types of [BPSK]. The signal is supplied via the audio input of the computer’s soundcard.
The software implements differential decoding hence the modulator must use differential encoding. The output of the demodulator can be directed to either a built-in console or to a [UDP] network port.

An OQPSK demodulator has now been added to support the faster 10.5k Aero signals.

![](images/screenshot-win-planelog.png)

##Binaries
Expand All @@ -29,7 +31,7 @@ After installing Qt download the JAERO zip or the tar.gz source file to your com

Open the [JAERO/JAERO.pro](JAERO/JAERO.pro) file with Qt creator where by Qt should ask you a few simple questions as to how to build JAERO. finally click build then run.

Jonti 2015
Jonti 2016
http://jontio.zapto.org

[OQPSK]: https://en.wikipedia.org/wiki/Phase-shift_keying#Offset_QPSK_.28OQPSK.29
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