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Doppler Damage - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Doppler Damage
Posted: Sun Nov 05, 2006 5:00 am 
 
Lieutenant

Joined: Mon Sep 12, 2005 4:02 pm
Posts: 4
Location: Washington DC
[color=blue]Hi,
I'm wonderning if I could get some reference material or email on the SNR loss with respect to Doppler losses and, if possible its effect w/r to modulation schemes. Mostly interested in X-to-V band with M-ary FSK, but PSK schemes, QPSK, CDMA would also be of interest.

Also would like to know timing delays for typical doppler compensation rate loops (ie how fast can ompensation loops track back to the reference signal? How many cycles are necessary to determine proper compensation? Is there an upper slew rate that is normally set for max doppler compensation in terms like (delta F/F) ? etc.)

Regards,
Michael.j.furman@mdnt.com






Posted  11/12/2012
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