Synthetic Aperture Radar Pulse Compression and Processing for High Resolution Imaging
This paper aims to design a transmitter and a receiver system for a synthetic
aperture radar (SAR) to be used on either an aircraft or a LEO satellite for high
resolution imaging on the earth’s surface. The transmitted pulse is to be shaped and
modulated before transmission. The construction of a compressed time domain echo
pulsed signal in the receiver is shown to improve the range resolution without side
effects on the signal to noise ratio by using a matched filter. Also a particle swarm
optimization (PSO) algorithm in the matched filter design is used here for different
higher orders of polynomial instantaneous frequency modulation to reduce the
sidelobe levels of the autocorrelation function at the output of the matched filter that
represent the undesired targets with respect to the main lobe level that represents the
desired target in the received echo pulse. The PSO algorithm and its results are shown
by using MATLAB program codes.
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