MODULATION TECHNIQUE FOR COGNITIVE RADIO APPLICATIONS

As the development of modern communication techniques is increasingly fast, the demand for reliable high data rate transmission had been increased significantly, which leads to much interest in modulation techniques. In this paper modulation technique is discussed for Cognitive radio networks. CR is an emerging radio approach in which transceivers are combined with sensors, intelligence, and adaptability. The idea for cognitive radio has come out of the need to utilize the radio spectrum more efficiently, and to be able to maintain the most efficient form of communication for the prevailing conditions. PSK (Phase Shift Keying) is widely used these days within a whole raft of radio communications systems. It is well suited to the growing area of data communications. PSK enables data to be carried on a radio communications signal in a more efficient manner than Frequency Shift Keying, FSK some other forms of modulation. Transferring from analogue formats to digital formats data communications is growing importance, and along with it the various forms of modulation which are used to carry data. Keywords-Cognitive Radio, Phase shift keying, Radio Communication, Frequency Shift Keying.