Research Of Spectrum Detection And Management In Cognitive Radio

As technology advances, economic development rapidly, relationship between people increasingly become close, modern society and the future society will become increasingly inseparable from the development of communication technology, and now the situation of shortage of spectrum resources will last a long time, how to improve the spectrum efficiency will remain a concern. Cognitive radio is to improve the technical spectrum efficiency, and after proposed, it is concerned by all nations, the development and research of cognitive radio technology has become a hot, new ways and new technology of cognitive radio spectrum sensing, management, and distribution will be endless. In this paper, we study the field of spectrum sensing and management technology of cognitive radio technology, aim to explore the new spectrum management and allocation strategies based on the interference temperature, we use the learning ability of cognitive radio systems to enhance spectrum use efficiency.This paper introduces the status of cognitive radio spectrum sensing and management, analysis the current classification of wireless sensing technology and characteristics of a variety of sensing methods. Broadly speaking, the interference temperature is also an energy index, interference temperature sensing method is a kind of energy sensing algorithms, this paper discusses the sensing technology of interference temperature mechanism. Most of the current spectrum allocation methods consider occupied band only from the power dimension, which cannot reflect the band features and statistical features in the time dimension, and also is not able to support a better choice of spectrum resources in the time dimension. In this paper, some spectral characteristics and patterns of the time dimension are added to spectrum management module of cognitive radio systems, the spectrum management algorithm based on channel availability is proposed. Based on the results of the energy perception, this paper analysis of the value of interference temperature of the monitored channel and the variation of interference in time dimension, obtain the channel availability sequence diagram by the formula for cognitive radio systems to switch to the best channel when necessary. This article also analyzes the measured signal, simulates and does statistics by using the measured data, check the spectrum environment, summarizes the spectrum characters by using simulation statistics and calculation, provides data basis for channel availability algorithm.