##WirelessAcousticCommunication (CSE 561 project spring quarter 2014 at UW)

####Fahad Pervaiz (fahadp@cs) & Lukas Bischofberger (lukasbi@cs)

Designing a wireless acoustic communication channel on an android phone

###Sender Consists of MainThread (UI) and a worker thread which encodes the data and sends the signal.

• UI Input
• convertData(String message) ** slice message into chunks ** convert to bit array ** for each chunk: e.g. stuff bits, create header and checksum / CRC, add preamble
• modulate(bits, carrier signal, bitspersymbol)
• sendToSpeaker

###Receiver Consists of a MainThread (UI), a service which listens to acoustic signals and a worker thread which processes the signal and decodes the data.

• Listen to micro and store data in buffer
• Process data and identify preamble
• Decode data back to string
• Display message