The document discusses the use of cognitive radios for LTE and TV white space (TVWS). It describes how cognitive radios allow femtocells to search radio channels to identify free resources and avoid interference. Cognitive radios also enable self-organizing networks (SON) in LTE by allowing femtocells to be aware of neighboring cells' power and spectrum allocation. The document further discusses how cognitive radios act as an enabler for using whitespace in the TV spectrum by finding available spectrum in the TV band. As of September 2010, there were 701 issued patents and pending applications related to cognitive radio for TVWS, with Samsung, Motorola, and Qualcomm leading in innovations.