| Precision-guided anti-ship missile has become the main weapon in modern naval warfare. Radar seeker is one of the most common approaches to the terminal guidance for anti-ship missile. With the increasing complexity of electromagnetic environment in modern naval warfare, it is faced a variety of electromagnetic interference in anti-ship terminal guidance radar seeker, which poses a serious threat to the operational effectiveness of anti-ship missiles. In radar signal processing systems, system-level simulation is an extremely important role. Notably, it can ensure the correctness of the product design at the highest level, Noticed that the technology of computer simulation has many advantages, including controllability, repeatability, non-destructive, security and economy. Therefore, simulation technology to simulate and evaluate the radar and electronic warfare equipment is used as an important tool in current and future research area of radar and electronic countermeasures.In this paper it is a background that the complex ship defense seeker technology. It is designed and implemented of the simulation system under the conditions of complex against anti-ship seeker detection performance. The simulation system can be used in different environments and against the conditions of the seeker and the performance of the operation process observation and analysis, and provides the basis for the performance prediction and evaluation of the radar guidance.What is firstly introduced in the introduction is the research background, research status, and the contents of this thesis.In Chapter two it is investigated that main types of signal simulation model of the system, including the ship targets, sea clutter, typical interference - Simulation of chaff. Methods using ZMNL Maguire is on level 0 and 5 Sea clutter , respectively; and Swerling IV RCS model is selected to simulate ship targets. Finally, by analyzing the distribution of chaff and electromagnetic properties of clouds, simulation of Chaff Cloud is performed for the next text to provide a background signal against the environment.By using the work flow of the anti-ship seeker, in Chapter three it is completed the seeker signal processing model of digital simulation. Firstly, it is analyzed the emission signal-LFM signal, and simulated time domain waveform and its spectrum; the cosine function selected to approximate describe the antenna pattern; in the high-resolution system, the derived model and the target signal along with clutter model; the principle of pulse compression, simulation of the LFM signal after the echo pulse compression diagram; introduced non-coherent and coherent integration of the simulation model; Finally, the principles of the target detection and target tracking signal processing methods is presented to provide the model of the system simulation. In Chapter four Matlab and LabVIEW programming design tools are combined with to complete the entire simulation system design and implementation. Based on the target and clutter and signal processing modeling and simulation in the preceding chapters, it is used that Matlab and LabVIEW-based hybrid programming to achieve LabVIEW-based anti-ship missile seeker Defense Simulation System. And it is designed of a number of different simulation conditions, running case through the system processes to verify the effectiveness of system simulation.The work which had been done in this paper has been summarized in the final chapter. |
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