Re: [bluetooth] Re: Clock Recovery in BT

[Jamil Khatib <khatib@ieee.org>]

Ling Su wrote:

> The threshold should be 6 if we set it statically, since the encoding method
> of Access Code give 6 coding distance. Of course, I didn't see some paper
> talking about dynamic change the threshold.
>

>From where did you get this number? it is not mentioned in the BT spec.
Do you mean that when 6 bits are matched the correlator should trigger hte start of frame?


>
>  Usually a wireless system has a preample
> like 10 or more bits, which gives more time to do clock recovery, but in
> bluetooth, there is only 4 bits, so it will be more chanllenging.
>

Should we operate teh correlator at double the BT data rate to solve such problem?

regards,
Jamil Khatib
OpenCores Organization
http://www.opencores.org




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