On Mon, 31 Aug 2015 16:22:22 +0000, Eric Jacobsen wrote:
> On Mon, 31 Aug 2015 10:36:02 -0500, ".avinash." <108300@DSPRelated>
> wrote:
>
>>Hey there everyone!
>>I'm actually right now researching about ofdm based realization to
>>efficiently estimate the doppler shift and I've kinda run into a block
>>In the typical block diagram there's a IFFT/FFT block,I've read on many
>>forums but I'm unable to determine the significance of the said block
>>Also,if its possible could anyone help me understand why actually
>>circular convolution is better rather than linear convolution The code
>>that I'm writing to implement the same is in Matlab
>>
>>Thank you in advance for your help Avinash.
>>
>>
>>---------------------------------------
>>Posted through http://www.DSPRelated.com
>
>
> These are pretty fundamental questions best answered first in a good
> comm textbook or tutorial about the basics of OFDM. This assumes you
> already know what an FFT is, which is it sounds like you may not.
>
> In that case, before looking into the communication-oriented specifics
> of OFDM, you need to first understand the signal processing associated
> with the Fourier Transform and the differences between linear and
> circular convolution and how that applies to operations performed with
> the FFT. Once you do that it will be easier to understand how OFDM
> handles channel delay spreads.
>
> In short, a newsgroup on the internet is not the best way to learn these
> things.
Yup. Book-length answers don't fit well in 500 word posts.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Reply by Randy Yates●August 31, 20152015-08-31
eric.jacobsen@ieee.org (Eric Jacobsen) writes:
> [...]
> In short, a newsgroup on the internet is not the best way to learn
> these things.
On Mon, 31 Aug 2015 10:36:02 -0500, ".avinash." <108300@DSPRelated>
wrote:
>Hey there everyone!
>I'm actually right now researching about ofdm based realization to
>efficiently estimate the doppler shift and I've kinda run into a block
>In the typical block diagram there's a IFFT/FFT block,I've read on many
>forums but I'm unable to determine the significance of the said block
>Also,if its possible could anyone help me understand why actually circular
>convolution is better rather than linear convolution
>The code that I'm writing to implement the same is in Matlab
>
>Thank you in advance for your help
>Avinash.
>
>
>---------------------------------------
>Posted through http://www.DSPRelated.com
These are pretty fundamental questions best answered first in a good
comm textbook or tutorial about the basics of OFDM. This assumes you
already know what an FFT is, which is it sounds like you may not.
In that case, before looking into the communication-oriented specifics
of OFDM, you need to first understand the signal processing associated
with the Fourier Transform and the differences between linear and
circular convolution and how that applies to operations performed with
the FFT. Once you do that it will be easier to understand how OFDM
handles channel delay spreads.
In short, a newsgroup on the internet is not the best way to learn
these things.
Eric Jacobsen
Anchor Hill Communications
http://www.anchorhill.com
Reply by .avinash.●August 31, 20152015-08-31
Hey there everyone!
I'm actually right now researching about ofdm based realization to
efficiently estimate the doppler shift and I've kinda run into a block
In the typical block diagram there's a IFFT/FFT block,I've read on many
forums but I'm unable to determine the significance of the said block
Also,if its possible could anyone help me understand why actually circular
convolution is better rather than linear convolution
The code that I'm writing to implement the same is in Matlab
Thank you in advance for your help
Avinash.
---------------------------------------
Posted through http://www.DSPRelated.com