At first go to : http://ieeexplore.ieee.org/Xplore/home.jsp

Then write what you want in the search box

After search it will show your search result

Now copy DOI number which paper you want ( Indicate in the red box)

Then go to: http://sci-hub.cc/

And paste DOI number in the search box ( If DOI number is not available Then copy the link and paste in the search box)

Then click open

Now enter the code in the box and press Enter

Then your Paper will start download