Re: [bluetooth] Re: Clock Recovery in BT

[Jamil Khatib <jamilkhatib75@yahoo.com>]

Hi,
> >
> > Should we operate teh correlator at double the BT
> data rate to solve such
> problem?
> >
> 
I think this clock recovery unit should be in the RF
interface not in the baseband controller.

The correlator should use the recovered clock to
operate. You suggest to operate the system at 11MHz
and the correlator at teh recovered clock and perform
synchronization between them?

I agree with you that the correlator is too slow and
needs lot of improvements.


> No enough, we need operate at more than 11Mhz to
> recovery the clock in the
> receiver end. I am not sure if you understand what I
> mean, the correlator is
> working in Frame Level, and the clock recovery
> working at symbol level, the
> correlate will using the clock from "clock recovery"
> module as its operation
> clock to do the correlation to make frame level
> synchronization.
> 
> About current implementation of correlate, it is to
> slow if we do sequential
> summation, we need impalement a parallel adder to
> make it faster. At least
> can be finish within 6 system clock.
> 
> Regards,
> -Ling
> 
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