Addition of UE TX in USRP (still under test), calibration of UE RX for 5/10/20 MHz with USRP, new noise and signal power estimation for UE- RK

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6609 818b1a75-f10b-46b9-bf7c-635c3b92a50f