(non-touch) iPhone gesture recognition

I am about to start on a huge new project which will rely on the use of an Arduino connected to third party electronics (in this case an electromyography board I have already built).

I have a good idea of how to transmit data between the Arduino and the iPhone or iPad using protocols like OSC and an Ethernet shield.

What I am hoping to achieve is to effectively analyse an incoming analog signal and recognise the gestures employed to create that signal. So what 开发者_JAVA技巧I am essentially talking about is waveform analysis, whether it is on the iPhone side or on the Arduino side. Are there any libraries or previous methods of analysing or recognising gestures? This is going to be a large research project, so I am really looking for a push in the right direction.

This, I understand, might be a vague question so if anybody wants me to shed some light on the matter I will be more than happy.