Broadband Cognitive Radio Transmission Based on Sub-Channel Sensing and NC-OFDM

Date Added: Aug 2010
Format: PDF

Cognitive Radio (CR) has now been applied for broadband communication systems, so its spectrum sensing technique should be in a broadband signal detection framework. Conventional sensing algorithms such as energy detection are only effective for narrow-band signals or a single broadband signal in the detection range of the spectrum. In this paper a channellization receiver based on DCT filter banks is adopted, which can divide a wide frequency scope into a number of small sub-channels, so energy detection or other sensing algorithm can be used to determine the existence of the primary user within these subchannels.