The Modeling And Implementation Of Electronic Reconnaissance Simulation System

The study of systems on electronic countermeasures is a complex project, which involves two components of electronic reconnaissance systems and electronic jamming system. The electronic reconnaissance is the foundation and premise for the implementation of electronic countermeasures. Containing a number of levels, each system involves many professional fields. The reliability and stability of the system can be verified by simulation technology, which can both evaluate the performance of the system effectively and compensate the inadequacy of outfield test.First of all, design principles of software architecture are discussed in this dissertation, namely standardized, hierarchical, dynamic and reconfigurable principles. Then three kinds of architectures of reconnaissance simulation system are devised, which are architectures based on hierarchical system, architectures based on pipe/filter and object-oriented architectures.Secondly, the channelized receiver, the instantaneous frequency measurement receiver and the interferometer direction finding receiver in electronic reconnaissance system are modeled in math and verified in MATLAB. First, through the analysis of the difficulties and inefficiency of low-pass filter group model, an efficient polyphase DFT filter group model based on complex signal and real signal can be achieved. Then, the digital frequency measurement models based on instantaneous autocorrelation method and phase difference method are discussed in detail, which are simple in principle, small amount of calculation, easy to project implementation. At last, this dissertation mainly discuss phase discriminator models and phase wrap models. In phase discriminator models, two algorithms are mainly discussed, which are narrowband phase detecting algorithm in time domain or frequency domain and broadband phase detecting algorithm in frequency. The phase detecting precision of the two algorithms are quite high under certain SNR. In phase wrap models, wrap algorithms based on narrow-band signals or broadband signals are discussed, which phase wrap performance of the two algorithms are better in reasonable range of incident angle.Thirdly, on the basis of the software architecture of reconnaissance simulation system and the theoretical model of frequency measurement and direction finding, each function module of the electronic reconnaissance system is modeled by case model, static model and dynamic model using the unified modeling language(UML). According to the established UML models, the function modules are designed and implemented by following the principle of standardization, hierarchicalization and visualization.Finally, each function module of reconnaissance system is designed on the basis of development platform of the project by using the system modeling software. The overall construction of modules, comprehensive setting of parameters and simulation of an electronic reconnaissance system can be achieved by using the system architecture software. Therefore, the electronic reconnaissance system’s modeling work of the cross-platform and cross-software heterogeneous simulation model can be implemented, and the demand of distributed, interoperable, reusable of modeling and simulation technology can be satisfied.