Fractionally Spaced Equaliser

cpshah99 wrote:
> Hey Vladimir
> 
> Thanks a lot.
> 
> Just help me understand this last thing.
> 
> Take a rectangular pulse. Convolve that pulse with itself. So the duration
> of the resulting triangular pulse is *twice* of the rectangular pulse.
> 
> eg: if rectangular pulse is 12 samples long then triangular pulse will be
> 24 samples long.

I make it 23 samples long.

> So it does not matter when I need two samples per symbol:
> 
> If I take samples at 1 and 12 or samples at 6 and 17.
> 
> And another que: do I really need matched filter or not?

Matched filters help with noise. If there is little enough noise, you 
don't need the help.

   ...

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

cpshah99 wrote:
> Ok. So I stic to basic.
> 
> Just last thing. Please tell me if my basic r correct or not. 
> 
> Receive the signal(multipath,noise), downconvert, pass it thru matched
> filter, take 2 samples per symbol(anywhere within that symbol duration) and
> give them to FSE.
> 
> Thanks again. Really appreciated. (I know you hate these words)

It seems that you are one of those who thinks that memorizing is the 
same as learning. You need to understand what happens when you do an 
operation, not just know how to do it by rote.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

>cpshah99 wrote:
>> Ok. So I stic to basic.
>> 
>> Just last thing. Please tell me if my basic r correct or not. 
>> 
>> Receive the signal(multipath,noise), downconvert, pass it thru matched
>> filter, take 2 samples per symbol(anywhere within that symbol duration)
and
>> give them to FSE.
>> 
>> Thanks again. Really appreciated. (I know you hate these words)
>
>It seems that you are one of those who thinks that memorizing is the 
>same as learning. You need to understand what happens when you do an 
>operation, not just know how to do it by rote.
>
>Jerry
>-- 
>Engineering is the art of making what you want from things you can get.
>�����������������������������������������������������������������������
>

%%%%%

Hi Jerry.

Thanks.

You r correct...it makes it 23 samples long.

And the problem is, I have implemented one receiver and it is working
exactly how it should.

But when I read that perticular line, it screwd up everything.

And somebody told me that to take 2 samples per symbol, i need to use some
filter that has twice the bandwidth or something like that. Just did not
make sense and screwd my mind entirely. These kind of incidents are not
good.

I think discussing your problem is good as it helps to understand it more
clearly, but yesterday i went mad. Now, the problem is I doubt what I have
done so far is correct or not.

Anyways. Thanks again

Chintan

robert bristow-johnson wrote:

> On Apr 15, 5:55 pm, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
> wrote:
> 
>>robert bristow-johnson wrote:
>>

>>>are you practicing your Don Rickles routine?
>>
>>What Don Rickles?
>>
> 
> an American comedian from the 60s, 70s, and 80s.  i think the guy is
> still alive.  he appeared on the Tonight Show before the Jay Leno era
> (the Johnny Carson era). 

No idea. BTW, I don't keep TV in my house.

> his schtick was insulting people and groups
> of people (sometimes ethnic groups), sometimes directly to their
> faces.  sometimes it was outrageously funny.  particularly when it was
> "well deserved" but only in a stereotypical sense.

But there is a strong and obvious correlation; despite of what the 
ministry of truth is trying to knock in the heads. Just look.

And even if you can forget who you are and where are you from that 
doesn't mean that they are going to forget that also.

> other folks have picked up on it.  most recently might be South Park
> (in which i, myself, am stereotypically ridiculed as "Aging Hippie
> Liberal Douche").

What about your anti gay and pro ID convictions?


VLV