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Research on Modeling and Simulation of Sea Clutter and Implementation on FPGA

Author: XiaYang
Tutor: FuQiang;LuZaiQi
School: National University of Defense Science and Technology
Course: Information and Communication Engineering
Keywords: Sea Clutter Clutter modeling Clutter Simulation ZMNL Amplitude distribution FPGA CORDIC FIR Random number Weibull distribution System implementation
CLC: TN955
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 0
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Radar signal simulator for its versatility, flexibility, scalability become an integral part of the radar system design, the clutter simulation as a key part of the radar signal simulator has to the overall performance of the radar signal simulator crucial impact. The clutter model accuracy become an important measure of simulator performance indicators. The background of this research work to the radar IF signal simulator around the statistics of the sea clutter modeling and simulation, real-time FPGA-based platform of sea clutter and sea clutter echo signal system and expand the main contents include the following aspects: introduction, first introduce the background and significance of the research; then elaborated the radar signal simulator and sea clutter research status, trends, and the latest progress of the key devices; Finally, this subject research and the overall framework of the paper. The second chapter will start around the modeling and simulation of sea clutter and sea clutter model selection. First outlined the the sea clutter concept; then introduce a common statistical model of sea clutter: amplitude distribution model and backscattering coefficient model, the power spectrum model, on this basis, introduces the simulation of sea clutter commonly used methods: zero memory nonlinear (ZMNL: Zero Memory Nonlinearity) and spherically invariant random process method (SIRP: Spherically Invariant Random Process); then, combined with the practical application of the radar signal simulator scene, in the analysis of the measured data sea ??clutter model selected on the basis of the solution, while the model; final model for simulation modeling and experimental results are given. The third chapter in the previous chapter, the algorithm theory-based, focusing on the analysis of sea clutter on FPGA. First discusses the principle and implementation of the CORDIC (Coordinate Rotation Digital Computer) algorithm, an example to trigonometric functions; subsequently introduced the method of random number generation, and simulation experimental and theoretical values ??were analyzed contrast; FIR (Finite Impulse Response) filter design methods in the field of digital signal processing, the FIR filter hardware implementation of a simplified structure; Finally, the amplitude distribution of sea clutter model hardware platform based FGPA The structural analysis of simulation results, the correctness of the generated model. Chapter IV for sea clutter echo signal system and expand. First introduced the calculation of the division and antenna pattern of the radar beam irradiation unit inland sea clutter area; then given sea clutter echo signal generation method and implementation process, the simulation experiments and results analysis; final combination of hardware platform sea ??clutter echo signal to achieve the block diagram and system performance, the experimental results show the effectiveness of the system. Related sea clutter echo signal FPGA-based platform has a certain significance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar system simulation
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