Comments for Cognitive Radio Project http://cr.jamesyxu.com A 4th Year Project by James Xu (Dr. Fakhrul Alam as Supervisor), Massey University, Auckland, New Zealand Thu, 05 Nov 2009 06:11:27 -0800 http://wordpress.org/?v=2.8 hourly 1 Comment on Preliminary wideband channel sensor by mudasir http://cr.jamesyxu.com/?p=139&cpage=1#comment-103 mudasir Thu, 05 Nov 2009 06:11:27 +0000 http://cr.jamesyxu.com/?p=139#comment-103 Hello where is the report Hello

where is the report

]]> Comment on Cyclostationary feature extraction through SCF by mudasir http://cr.jamesyxu.com/?p=247&cpage=1#comment-102 mudasir Thu, 05 Nov 2009 06:00:52 +0000 http://cr.jamesyxu.com/?p=247#comment-102 Hello I have been going through cyclostationary and found that u have are working on cyclostationary. I was working with cyclostationary toolbox to find out cyclostationary features of BPSK and QPSK signals. I will send u my code also available on pudn cyclostationar tool box SCD for cyclic autocorrelation. it gives good result for BPSK but for QPSK and others (e.g 8psk) it gives the same result as BPSK. while there is a difference between features of BPSK and QPSK as in QPSK alpha=2xfc doesn’t have a peak. but for this algo I find the peak at alpha=2xfc for QPSK as well. How do I classify my signals. Why doesn’t this I and Q components cancels their effects in my case? regards Madd Hello

I have been going through cyclostationary and found that u have are working on cyclostationary. I was working with cyclostationary toolbox to find out cyclostationary features of BPSK and QPSK signals. I will send u my code also available on pudn cyclostationar tool box SCD for cyclic autocorrelation. it gives good result for BPSK but for QPSK and others (e.g 8psk) it gives the same result as BPSK. while there is a difference between features of BPSK and QPSK as in QPSK alpha=2xfc doesn’t have a peak. but for this algo I find the peak at alpha=2xfc for QPSK as well. How do I classify my signals. Why doesn’t this I and Q components cancels their effects in my case?

regards
Madd

]]> Comment on Cyclostationary feature extraction through SCF by yuexin http://cr.jamesyxu.com/?p=247&cpage=1#comment-101 yuexin Sat, 10 Oct 2009 07:49:24 +0000 http://cr.jamesyxu.com/?p=247#comment-101 Thank you very much Thank you very much

]]> Comment on Cyclostationary feature extraction through SCF by James http://cr.jamesyxu.com/?p=247&cpage=1#comment-100 James Sat, 10 Oct 2009 07:27:05 +0000 http://cr.jamesyxu.com/?p=247#comment-100 as you may have noticed, the cyclostationary feature extraction is not my main area of focus, as my time is short (1 year project). As a result, the code is proof of concept only, and is a direct implementation of the methods mentioned in the papers (linked in the post). We may open our codebase (SVN) at the end of the year, in about 2 weeks, so you may want to check back on the blog and see if we have any updates as you may have noticed, the cyclostationary feature extraction is not my main area of focus, as my time is short (1 year project).

As a result, the code is proof of concept only, and is a direct implementation of the methods mentioned in the papers (linked in the post). We may open our codebase (SVN) at the end of the year, in about 2 weeks, so you may want to check back on the blog and see if we have any updates

]]> Comment on Cyclostationary feature extraction through SCF by yuexin http://cr.jamesyxu.com/?p=247&cpage=1#comment-99 yuexin Sat, 10 Oct 2009 07:21:12 +0000 http://cr.jamesyxu.com/?p=247#comment-99 hello i'm working on spectrum sensing techniques in cognitive radio...it is an emerging topic and we don't find any codes or any help for it. And here , i find this projec can help me , so it's very kind of you to send me some matlab code... it would be the greatest help for me in doing my project... thank u in advance hello
i’m working on spectrum sensing techniques in cognitive
radio…it is an emerging topic and we don’t find any codes
or any help for it. And here , i find this projec can help me ,
so it’s very kind of you to send me some matlab code…
it would be the greatest help for me in doing my project…

thank u in advance

]]> Comment on Very good articles – Part 1 by Ebrahim http://cr.jamesyxu.com/?p=125&cpage=1#comment-98 Ebrahim Sun, 20 Sep 2009 19:26:48 +0000 http://cr.jamesyxu.com/?p=125#comment-98 Thanks for sharing, this is so helpful. Waiting for the second part. Thanks for sharing, this is so helpful. Waiting for the second part.

]]>