- The only problem is when input is sine wave(delta

function in frequency at fm in frequency domain) in

which case the sample phase determines whether they

add up constructive or destructively. In other cases

should be ok.

--- Tom P <dsp_learner@...> wrote:

>

http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/26EolB/TM

>

> Hello All,

>

> As we know that for perfect reconstruction of any

> signal, we should follow the Nyquist criteria i.e.

>

> fs>=2fm

> where, fs= sampling frequency

> fm= highest frequency of the signal

> My question is :

>

> 1.What happens when the signal is sampled exactly at

> twice fm i.e. when fs=2fm ?

> 2. Is there any hidden concept involved in this case

> ?

>

> Thanks in advance

> Tom

>

>

>

>

>

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Regards,

-Min

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I am new member in this group .

Ya U can sample even less than the sampling rate that process is called decimation .

But U will have aliasing problem .

SO u got a pass through a low pass filter first and then sample it ...

the whole process is called decimation.

U got a topic called multirate sampling which deals with decimation and interpolation.

if there is any mistake please mail me

so that i correct my concepts.

thanks

manik

Tom P <dsp_learner@...> wrote:

Hello All,

As we know that for perfect reconstruction of any

signal, we should follow the Nyquist criteria i.e.

fs>=2fm

where, fs= sampling frequency

fm= highest frequency of the signal

My question is :

1.What happens when the signal is sampled exactly at

twice fm i.e. when fs=2fm ?

2. Is there any hidden concept involved in this case ?

Thanks in advance

Tom

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[Non-text portions of this message have been removed] - Hi,

Currently I am trying to turn on the case sensitivity in my Matlab Environment,

but I forgot the Matlab command now. Is anyone remembered that Matlab command?

I used it before, but I just can't remember now.

Thanks,

Gleason

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http://info.mail.yahoo.com/mail_250 - Hello Gleason,

I am not sure if the matlab user has control over the

case sensitivity. If you mean matlab R14 you maight

check

http://www.mathworks.com/access/helpdesk/help/techdoc/rn/rn.html

There is section for case sensitivity. In release r14

you can suppres several warnings about inexact match.

Best Regards

penev

--------------

www.dsp-bg.info

--- Gleason Chen <gq2c@...> wrote:

>

__________________________________

> Hi,

>

> Currently I am trying to turn on the case

> sensitivity in my Matlab Environment,

> but I forgot the Matlab command now. Is anyone

> remembered that Matlab command?

> I used it before, but I just can't remember now.

>

> Thanks,

> Gleason

>

>

>

> __________________________________

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> Yahoo! Mail - 250MB free storage. Do more. Manage

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