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Modeling and Hardware-in-the-loop Simulation for Wideband and Coherent Radar Environment Clutter

Author: GongShuFeng
Tutor: PanMingHai
School: Nanjing University of Aeronautics and Astronautics
Course: Electromagnetic Field and Microwave Technology
Keywords: Broadband coherent radar Clutter modeling Semi-physical simulation Digital Radio Frequency Memory
CLC: TN955
Type: Master's thesis
Year: 2011
Downloads: 81
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Abstract


Clutter is a feature , the sea and weather radar echoes caused by the environment , its performance target detection radar system has a great influence . Radar clutter models are statistical models and real scene models , statistical models of clutter with a simple , easy features ; based on digital elevation model (DEM) clutter model complex scenes with high fidelity and high accuracy. By the radar clutter simulator, antenna array feed system , turntable and other components of the clutter semi-physical simulation system that can build real radar clutter RF environment clutter environment used to validate the target detection performance of radar systems . This paper studied the statistical model and clutter clutter simulation method discussed narrowband and wideband radar radar clutter amplitude distribution statistical model and the power spectrum model, and using zero memory nonlinear transformation method (ZMNL) and spherically invariant random process Approach (SIRP) narrowband radar clutter and four coherent wideband radar clutter modeling and simulation, data clutter statistical models , including surface features , such as background sea of electromagnetic scattering properties , and then and radar transmitter pulse signal convolution operation , you can reconstruct the statistical model clutter signal . Computer simulation results verify the validity and accuracy. Secondly studied based on digital elevation model data of complex scenes wideband radar clutter modeling and simulation, using fractal theory, a complex three-dimensional terrain, DEM generation database through coordinate transformation, seek appropriate shelter during handling complex scenes wave scattering characteristics , and then with a broadband linear frequency modulation radar (LFM) signals math , get the scene clutter signal simulation environment , and from the high-resolution radar image from the perspective of a one-dimensional theoretical analysis . Finally studied the integration of array -based semi- physical simulation system clutter , clutter -loop simulation system, including the composition , in order to triple the core principle of targeting array feed system composition and working principle and other key technologies . Clutter Simulation System for digital radio frequency memory (DRFM) hardware circuit module and its high real fast convolution , large scattering coefficient access other hardware algorithm is studied , and gives a semi- physical simulation system clutter the test results.

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