AnsweredAssumed Answered

I&D Filter : Impossible to Simulate

Question asked by lbarro on Mar 17, 2005
Latest reply on Mar 21, 2005 by mschif

Like • Show 0 Likes0
Comment • 3

Hello...

I`m very disappointed with the SystemView!!!

My satellite system simulation requires a narrow bandwidth and consequently a I&D filter at the Earth Station.

I have tried for 1 month simulate this system, but I can't get a good result.

Even using a FIR filter (with no group delay distortion = linear phase) I got a big degration.

I think that the I&D filter isn`t the "real" I&D filter, because it doesn`t dump the signal at the end of integration windows.

In this case, the filter works properly with no limited band, whylst when we limit the band it doesn't work.

I am sending a example of a filter in attachment.

Please ...I need help!!!

[file]fir.svu[/file]

Attachments

fir.svu18.3 KB

No one else has this question

Outcomes

mschif Mar 17, 2005 9:44 AM

The I&D filter in Systemview works just fine. I have been using it
for years! I am the former CTO of Elanix

There are many problems withyour system as i tried to show you.

again, i cant do more from my day job

consulting? numberdr@earthlink.net

Actions

lbarro Mar 17, 2005 1:46 PM

Sorry Sr but I can't look any mistake in my simple system.

I read all AN relationed with BER, and there isn't example using I&D filter with limited band!!

So, I need solve this problem and I need help...

Sorry for any disturbance, but I need some help!

With the best regards

Luciano

Actions

mschif Mar 21, 2005 5:50 AM

Luciano,

Received your email at home. Tried to reply, but it bounced back.

re your system.

1) check the phase of the down converting lo with the phase of the signal at that point. Are they the same?

2) do you really want a BPF filter of .2 Hz BW when the data is at 1 Hz?

Actions

3 Replies

mschif Mar 17, 2005 9:44 AM
Mark Correct
Correct Answer
The I&D filter in Systemview works just fine. I have been using it
for years! I am the former CTO of Elanix

There are many problems withyour system as i tried to show you.

again, i cant do more from my day job

consulting? numberdr@earthlink.net
Like • Show 0 Likes0
Actions
lbarro Mar 17, 2005 1:46 PM
Mark Correct
Correct Answer
Sorry Sr but I can't look any mistake in my simple system.

I read all AN relationed with BER, and there isn't example using I&D filter with limited band!!

So, I need solve this problem and I need help...

Sorry for any disturbance, but I need some help!

With the best regards

Luciano
Like • Show 0 Likes0
Actions
mschif Mar 21, 2005 5:50 AM
Mark Correct
Correct Answer
Luciano,

Received your email at home. Tried to reply, but it bounced back.

re your system.

1) check the phase of the down converting lo with the phase of the signal at that point. Are they the same?

2) do you really want a BPF filter of .2 Hz BW when the data is at 1 Hz?
Like • Show 0 Likes0
Actions

I&D Filter : Impossible to Simulate

Attachments

Outcomes

Related Content

Recommended Content