The Method And Application Of Spectrum Sharing Of Detection And Communication Based On Information Theory

Traditional radar systems and communication systems are independent of each other.When faced with the threat of new combat methods such as joint airspace operations and multi-platform coordinated operations,making it increasingly difficult to meet the mission requirements of informationized and coordinated warfare.The emergence of the detection and communication integration system has achieved the organic integration of radar system and communication system.The detection and communication integration system can not only enhance the rapid fusion of battlefield situation information,but also heighten the flexibility and synergy of system.In order to exploit the preponderance to the full and improve the overall combat effectiveness of the detection and communication integration system,a reasonable and flexible spectrum resource scheduling scheme is essential.This dissertation is based on spectrum sharing methods,and focuses on the means and application of spectrum sharing of detection and communication based on information theory.The dominating contents of this dissertation is as follows:1.We introduced two spectrum scheduling modes of traditional spectrum non-sharing mode and detection-communication spectrum sharing mode.And then according to the characteristics of the detection and communication integration system,a mathematical model of spectrum sharing of detection and communication based on information theory is given.2.For the problem of spectrum sharing in target tracking scenarios,the spectrum sharing of detection and communication based on information entropy is proposed.Combining with the theory of information entropy,the location estimation rate is constructed to characterize the detection performance.And then the communication capacity is used as the communication performance indicator,so that a performance evaluation model of the detection and communication integration based on the theory of information entropy is established.On this basis,the performance upper bounds and capacity domains of the detection and communication integration system in the two spectrum scheduling modes are analyzed.3.In view of the limitations of the application scenarios of the spectrum sharing of detection and communication based on information entropy,the spectrum sharing of detection and communication based on mutual information is proposed.The detection mutual information is constructed to characterize the ability of detection to obtain target's information.And then,the communication capacity is used as the communication performance indicator.So that the performance upper bound and capacity domain of the detection and communication integration system in the two spectrum scheduling modes are analyzed.4.For the spectrum resource management problem of the detection and communication integration system under multi-detection working mode conversion is investigated with limited spectrum and time resource,the method of spectrum sharing on demand is proposed.The detection data rate is established to quantify the battlefield situation information that the detection and communication integrated system needs to transmit per unit time.And the detection data rate of TWS mode and TAS mode are analyzed.Then,the method of spectrum sharing on demand is put forward.Based on realizing the realtime sharing of battlefield situation information,the optimal sharing band is obtained according to the criterion of minimizing the mutual interference between radar and communication and maximizing the detection performance.And a comprehensive effectiveness evaluation of system performance under different detection working mode is carried out.