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Re: A-D hardware, was Re: [Discuss-gnuradio] Re: upconverting RF

On Fri, 14 Mar 2003  wrote:

> Lets say you did have a nice analog to digital data aq. card, could you with 
> the right analog device, turn the entire system into a primitive radar so to 
> speak? I am wondering about possible robotics applications with an a-d card, 

I have an ultrasonics TOF 3d tracker made by an Israeli company. It seems 
to be nontrivial to filter out the noise even in such simple applications. 
An ultrasonic sonar seems to require a lot of crunch, if you look at the 
bat's and cetacean neural circuitry.

> for example one such project I can think of would envolve ultrasound 
> detectors to determine proximity to obstacles without using some sort of 
> laser setup.

Just distance measurement should be doable. Just shift audio I/O from
/dev/audio into ultrasonics range and back.

> Could you with some effort, process an analog NTSC video signal and turn that 
> into a digital video stream such as a MPEG?

Yes, both in hardware and software, but why do you need that for a sonar?

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