The Research On Ultra-wideband Spectrum Sensing Technology In Cognitive Radio

Ultra wideband cognitive research focus as a new spectrum radio(UWB-CR)has become a current sharing wireless communication technology.Because of the limited the wireless spectrum resources as well as the applications of broadband wireless communications,cognitive radio technology has become one of the key technologies to solve the problem of spectrum resources,and has been widely recognized in industry field.In recent years,ultra-wideband(UWB)technology has become one of the focuses of the short-range wireless communications technology,the core idea of CR is the secondary user reliably senses the environment in the broadband spectrum for inspection primary user and occupies available local spectrum adaptively to avoid the interference between the primary user and the secondary user in the communication process.And the UWB system has a high transfer rate,low power consumption,strong anti-interference ability and safe transmission;The research on the combination of UWB communication technology and cognitive radio technology has aroused the concern of various industries,and it is of great practical significance to further study and improve the theory of ultra-wideband spectrum detection technology based on cognitive radio.This paper focuses on three aspects: the principle and key technologies of ultra wideband radio;wireless spectrum detection based on signal characteristics;spectrum sensing algorithm based on main user channel mode.Based on the research on the basic theory of spectrum detection technology of cognitive radio UWB,this dissertation discusses the characteristics of signal and channel transmission through theoretical analysis and algorithm simulation.The main research contents are as follows:1.The idea of cognitive radio is introduced into the detection of ultra-wideband signal,and in this dissertation,the main user transmitter spectrum sensing algorithm in cognitive radio is studied,and the performance of energy detector is analyzed.2.A comparative study of five more sophisticated spectrum detection techniques is presented,and their advantages and disadvantages are analyzed.Aiming at the problem of local spectrum detection,the preconditions of optimal perception time and transmission time are analyzed,and the detection method is summarized.3.The study presents a user based on the principal occupation The single user detection algorithm is compared with the energy detection method,and the simulation results show that the algorithm has high detection performance.4.Study on the application of UWB Technology in the development of military physical training load monitoring system,designed the UWB load monitoring system structure and the function of each module.