Cognitive Radio Project

Plans to open SVN

Posted in Project Related on July 22nd, 2009 by James – Be the first to comment

Nearer the end of the year, I will be looking at opening access to my SVN (Trac will not be open however).. currently I have all the files related to the project stored in it, I will probably start a new SVN repository and put the CRLibs and all the LabVIEW stuff I have done into the new one (and just sync the private and public svns with commit-hooks or something… does svn repo have user rights?? never seen it before).

Updates?

Posted in Project Related on July 22nd, 2009 by James – Be the first to comment

Hmmm… I havent posted here for a while (well like a week).. so lets see…

Entropy detection, we are still in the process of reading various articles, and looking at if we can use it for channel sensing
I’m in the process of getting an Antenna, Limiter, LNA etc etc you know the whole chain for Cellular bands (800-2100MHz).
I’m also collecting various bits and pieces of LabVIEW code I have written here and there, and collecting the useful ones into CRLib subVIs.
Writing documentations for CRLib at the moment, also putting out examples for people who want to use the lib.

Entropy detection

Posted in Rant on July 14th, 2009 by James – Be the first to comment

My supervisor (Fakhrul Alam) suggested to me an interesting idea the other day, its about measuring entropy and attempting to detect signals based on it.

Adaptive energy detection

Posted in Key Posts, Project Related on July 14th, 2009 by James – Be the first to comment

Right, so one thing we did find over the past few weeks when doing channel sensing, is that if your window is out of place (so that only a leg of the signal is in the detection window), or too big (compared to the signal you are measuring), you are not going to get much from that detector.

Thresholding in Energy Detector

Posted in Key Posts, LabVIEW, Project Related on July 7th, 2009 by James – Be the first to comment

This post is a continuation from the last one (Preliminary wideband channel sensor part 1). Here I am just going to detail a small section of the labView subVI, namely the Thresholding part. Working from part 1, I have consolidated the threshold calculation into a single subVI (Usage in part 2):

Preliminary wideband channel sensor

Posted in Key Posts, LabVIEW, Project Related on July 7th, 2009 by James – 1 Comment

Started on a preliminary sensor in LabVIEW last week, I’m going to just summarize the basic ideas behind this part, and then put some screenshots here. Details will be in the report at the end of the project if anyone is interested