On Mon, Jul 28, 2008 at 6:14 PM, Mohammad Hamed Firooz
<[EMAIL PROTECTED]>wrote:
>
> That is not always true, actually it depends on when and where you are
> going to measure a channel, For example in a office during a day, channel
> could change several times in a second.
>
That's correct Ham
That is not always true, actually it depends on when and where you are
going to measure a channel, For example in a office during a day,
channel could change several times in a second. So for indoor
applications a channel sounder should be as fast as possible.
I can refer you to these papers
On Fri, Jul 25, 2008 at 9:57 PM, Johnathan Corgan <
[EMAIL PROTECTED]> wrote:
> On Fri, Jul 25, 2008 at 6:12 PM, Nikhil <[EMAIL PROTECTED]> wrote:
>
> > I'm curious -- in a channel sounder application what benefit, if any is
> > there to performing the cross-correlation on the FPGA? This is assu
Hi
Johnathan is right, If you fulfill the channel measurement in
software your temporal resolution is not sufficient and you may not be
able to resolve lots of paths specially for indoor applications. For
more information I can refer you to Rappaport's book "Wireless
Communications: Princi
On Fri, Jul 25, 2008 at 6:12 PM, Nikhil <[EMAIL PROTECTED]> wrote:
> I'm curious -- in a channel sounder application what benefit, if any is
> there to performing the cross-correlation on the FPGA? This is assuming
> you are continuously transmitting the PRBS and computing the impulse
> response
On Thu, Jul 24, 2008 at 4:37 PM, Johnathan Corgan <
[EMAIL PROTECTED]> wrote:
> On Thu, Jul 24, 2008 at 12:30 PM, Nikhil <[EMAIL PROTECTED]> wrote:
>
> > Are you trying to measure the impulse response of the channel? If so,
> then
> > one technique would be to transmit a known pseudo-random bit
On Thu, Jul 24, 2008 at 12:30 PM, Nikhil <[EMAIL PROTECTED]> wrote:
> Are you trying to measure the impulse response of the channel? If so, then
> one technique would be to transmit a known pseudo-random bit sequence (an
> m-sequence) using BPSK modulation at the carrier frequency of interest.
On Wed, Jul 23, 2008 at 10:43 PM, Jason Uher <[EMAIL PROTECTED]> wrote:
> Hey all,
>
> What is the best way to measure the channel for use in space-time
> coding schemes using an RFX2400 board?
>
> As far as I know you can only get the I and Q streams out of the USRP,
> and I'm not sure how you wo
On Wed, Jul 23, 2008 at 10:43 PM, Jason Uher <[EMAIL PROTECTED]> wrote:
> Hey all,
>
> What is the best way to measure the channel for use in space-time
> coding schemes using an RFX2400 board?
>
> As far as I know you can only get the I and Q streams out of the USRP,
> and I'm not sure how you wou
Hey all,
What is the best way to measure the channel for use in space-time
coding schemes using an RFX2400 board?
As far as I know you can only get the I and Q streams out of the USRP,
and I'm not sure how you would get a set of channel coefficients.
I am planning on using the conjugate of the m
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