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[Discuss-gnuradio] Complete USRP DDC Frequency Response Analysis


From: Eng. Firas
Subject: [Discuss-gnuradio] Complete USRP DDC Frequency Response Analysis
Date: Thu, 17 May 2007 12:47:39 -0700 (PDT)

Dear Friends,

Attached is a complete MATLAB based USRP DDC frequency response Analysis
figures. The USRP DDC decimation rate was 64. The CIC filter response
(decimation =32), HBF response (decimation =2) and cascaded CIC + HBF (total
decimation =64) response figures are attached. The MatLab source file used
in this analysis is also attached.
I hope this is a useful work.

Regards,

Firas,

http://www.nabble.com/file/8500/%280%20-%2032%29MHz%29%20CIC%20Frequency%20Response%20%28CIC%20decimation%20%3D32%29.JPG
(0 - 32)MHz) CIC Frequency Response (CIC decimation =32).JPG 
http://www.nabble.com/file/8501/%280%20-%202%29MHz%29%20CIC%20Frequency%20Response%20%28decimation%20%3D32%29.JPG
(0 - 2)MHz) CIC Frequency Response (decimation =32).JPG 
http://www.nabble.com/file/8502/Useful%20Band%20%280%20-%201%29MHz%29%20%20HBF%20Frequency%20Response.JPG
Useful Band (0 - 1)MHz)  HBF Frequency Response.JPG 
http://www.nabble.com/file/8503/Useful%20Band%20%280%20-%201%29MHz%29%20CIC%20%2B%20HBF%20Frequency%20Response%20%28decimation%20%3D64%29.JPG
Useful Band (0 - 1)MHz) CIC + HBF Frequency Response (decimation =64).JPG 
http://www.nabble.com/file/8504/Full%20Band%20%280%20-%2032%29MHz%29%20USRP%20DDC%20Frequency%20Response%20%28decimation%20%3D64%29.JPG
Full Band (0 - 32)MHz) USRP DDC Frequency Response (decimation =64).JPG 
http://www.nabble.com/file/8505/Useful%20Band%20%280%20-%201%29MHz%29%20USRP%20DDC%20Frequency%20Response%20%28decimation%20%3D64%29.JPG
Useful Band (0 - 1)MHz) USRP DDC Frequency Response (decimation =64).JPG 
The MATLAB m File used to generate the above figures:-
http://www.nabble.com/file/8506/usrpddc.m usrpddc.m 

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