Re: [Discuss-gnuradio] detecting spectrum holes

[Abdelrahman Ahmed]

2012/3/23 George Nychis <address@hidden>

Finding white space in the spectrum can be done by looking at power across the bins you are monitoring.  I have done White space research with the USRP2 and the WBX, and they worked out great for me.  So you're on the right track!

Take a look at this work, Section 3.1:

http://static.usenix.org/event/nsdi10/tech/full_papers/yang.pdf

They have a basic technique for detecting white space.  Their paper was not about the TV bands, but the technique should work elsewhere.  

Best of luck, and welcome!

- George

ok, now i installed ubuntu from scratch on the two laptops not with windows.

so is there something missing in this installation :

 i used this link in synaptic to install gnuradio packages:

11.10 contains 3.2.2.dfsg-1ubuntu7 (http://packages.ubuntu.com/oneiric/gnuradio)

 and this guide to install the other packages :

http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall#Install-Dependencies

After successful installation still there is UHD, i installed it through this:

git clone git://code.ettus.com/ettus/uhd.git

cd uhd/host

mkdir build

cd build

cmake ../

make

make test

sudo make install

#Check where your path is with "find |grep libuhd"

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

i did not do anything else ??