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[bluetooth] want the white papers on correlators .
Sir,
we are final year students of electronics and comm.(B.Tech.).
We study at S.L.I.E.T,Longowal.A place in Punjab.(India)
Well Sir,weare in need of white papers on correlators that can be implemented using the VHDL language.
we would be very thankful to u if u kindly send it as soon as possible.
thanks..
----- Original Message -----
From: khatib at ieee dot org
To: bluetooth at opencores dot org
Date: Thu, 26 Jul 2001 23:34:12 +0200
Subject: Re: [bluetooth] Re: Clock Recovery in BT
> Hi,
> Try to look at the access code correlator I designed (you
> can find it in the bluetooth project pages).
> the correlator keeps comparing hte inputs till both the
> input and the expected value are matched within
> certain threshold. Till now I do not know how to select
> this threshold.
> regarding the preamble ( and since the correlator does
> not look for the exact pattern) I think we can
> ignore them
>
> Note: the correlator is too slow and it needs lot of
> modifications to get faster
>
> Any comments
> Jamil Khatib
>
> > Hello Mr. Khatib
> >
> > Yes that symbol recovery is what I am talking about.
> > There is a preamble of 1010 or 0101 before 68-bit
> > access code which helps in determining the symbol
> > rate. In inquiry and other packets which have no
> > header or payload, access code is only 68 bits,
> > without any preamble. also due to settling time of
> > radio, it is less likely that we can receive all the
> 4
> > bits of preamble at receiver. In all these cases
> (that
> > is no preamble and unknown number of preamble bits)
> > how symbol recovery can be done? I will be thankful
> to
> > you if you can guide me on this.
> >
> > regards
> > Faisal
> > --- Ling Su <<font class=email>lingsu at palmmicro
> dot com</font>> wrote:
> > > I guess it would't be access code correlator,
> it
> > > means the symbol recovery
> > > before you feed the data into your logic.
> Bluetooth
> > > need pretty fast
> > > recovery, since it only has 4 sync symbol.
> > >
> > > -Ling
> > >
> > > ----- Original Message -----
> > > From: "Jamil Khatib" <<font
> class=email>jamilkhatib75 at yahoo dot com</font>>
> > > To: <<font class=email>bluetooth at
> opencores dot org</font>>
> > > Cc: <<font class=email>faisalmaalik at yahoo
> dot com</font>>
> > > Sent: Wednesday, July 25, 2001 1:39 PM
> > > Subject: Re: [bluetooth] Clock Recovery in BT
> > >
> > >
> > > > Hi,
> > > > sorry for the delay.
> > > > do you mean the access code correlator?
> > > >
> > > > if not can you explain it to me because it
> seems
> > > the I
> > > > am missing something.
> > > >
> > > > regards,
> > > > Jamil
> > > >
> > > > --- Faisal <<font
> class=email>faisalmaalik at yahoo dot com</font>>
> wrote:
> > > > >
> > > > > Hello
> > > > >
> > > > > can any one help me in designing of
> the clock
> > > and
> > > > > data recovery sub-block of bluetooth
> baseband
> > > > > receiver. Any suggestions, ideas or
> relevant
> > > > > information would be welcome.
> > > > >
> > > > > Faisal
> > > > >
> > > > >
> > > > >
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> --
> Jamil Khatib
> OpenCores Organization
> http://www.opencores.org
>
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