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Interferometric synthetic aperture radar altimeter and compressed sensing technology research

Author: ChenWeiZhi
Tutor: DingDaZhiï¼›ChenRuShan
School: Nanjing University of Technology and Engineering
Course: Electromagnetic Field and Microwave Technology
Keywords: Synthetic Aperture Radar Interferometric Synthetic Aperture Radar Moving target detection Radar altimeter Compressed sensing
CLC: TN958
Type: Master's thesis
Year: 2010
Downloads: 534
Quote: 1
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Abstract


Synthetic aperture radar (SAR) in the microwave band , all-weather, all-time high resolution imaging detection work , either in the military or in the civilian , it has a very important role . This paper first introduces the principle of synthetic aperture radar imaging and imaging algorithms , and combines the antenna phase center offset along-track interferometry techniques briefly on the ground moving target detection . Spaceborne Ocean Radar Altimeter -depth study . Spaceborne Ocean Radar Altimeter capable of all-weather , all-time monitor ocean , sea level height, it provides significant wave height and ocean marine backscattering coefficient making it the most effective of Marine Environmental Dynamics, and various types of seafloor by sensors. This article focused on traditional radar altimeter sea surface altimetry satellite point only , the vertical flight path interferometric synthetic aperture radar technology applied to the ocean height measurement new marine research program wide radar altimeter , and to make it with the measurement the high accuracy and also the advantage of having a wide swath observations . Finally, for a traditional radar system must meet the Nyquist sampling theorem for high-speed sampling constraint problem , a detailed analysis of the low-speed the sampled radar imaging technology based on compressed sensing theory . Compressed sensing radar is compressed sensing, a new system of radar technology combined with traditional radar , the radar of its mission and the current system is coincidence , both for target detection , target imaging can also be completed . It utilizes the low rank of the signal characteristics that make it non-adaptive sampling rate substantially lower than the Nyquist sampling rate of the signal , reducing hardware requirements . So it can be seen as existing radar upgrade and supplement , and help solve engineering problems to be faced by the radar in terms of power, volume , weight , reliability and cost .

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