Research Of Spectrum Sensing And Spectrum Data Compression Technology In Cognitive Radio Communication System

With the rapid development of wireless communication technology, the use of spectrum resources is frequent, and the shortage of the spectrum are getting more and more serious, which limits the continuous development of the wireless communication. The feasible method Cognitive Radio can reuse the authorized spectrum, which ease the contradiction that the radio spectrum is too insufficient to meet the growing wireless spectrum requirements. Therefore, cognitive radio has become a hot issue in the wireless communication field in recent years. The spectrum detection is one of the most important technology in cognitive radio, cognitive radio business can be more effectively to carry out by the accurately detection and transmission of the frequency information. This paper involves spectrum detection and Information compression to promote interaction of spectrum information among the nodes.Firstly, this paper briefly introduces the cognitive radio Concepts, research area and key technology. Based on these, Some researches on spectrum sensing technologies of cognitive radio were done to achieve spectrum detection which implement the improved energy sensing technology on the USRP platform. Finally, inspired by JPEG compression ideas, the spectrum data compression using PCM and Huffman coding is realized to reduce the length of data.