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Channel coding for digital wireless..

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Blueteeth

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Hi,
Wasn't sure where to post this question (or even 'whether' to post it) because I have a question about digital comms, and I'm not sure if many people can help.

My basic problems is I need to send digital audio (16 bit @ 32kSPS) over a radio link. The throughput for this is immense, possibly up to 1MB/s. So I'm looking at a 2.4Ghz system, homemade.

Right, thats the raw data NRZ (start,stop,data ~24bits) but I'm still a bit indecisive as to the channel coding to use. The options I have are the following, and these can all be implemented at the same time but that would just use up way to much bandwidth. Thier advantages are also given:

Manchester encoding - for AC coupling/clock recovery/error correction

Convolutional coding - Forward Error Correction (better EC than manchester)

Direct Sequence spreading - Used for 2.4Ghz systems/error checking, privacy, noise immunity. (must be used for 2.4Ghz to comply with FCC/EU rules)

I realise that its a bit of a weird question, because it depends on so many factors, such as what type of radio to use, but this is also a bit of a tough decision.

You see, I would need the DSSS for 2.4Ghz, since frequency hopping wouldn' provide enough throughput (unless I use QPSK, but I really can't be bothered :roll: ). I *would* like some form of error correction, but since this is audio small errors probably wouldn't matter.

I've been looking on the net for about a year now, and have collected a lot of info on all the above, but actual 'facts' about current wireless audio systems are sparse and a bit vague.

If anyone could give me their experiences/opinion on this, or point me in the right direction I would be grateful. Any suggestion on the use of radio band to use (ISM) would be nice too :p

Blueteeth
 
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