| dc.description.abstract |
Target Detection is the most important factors in RADAR system and many researches
have already done their research to improve the detection capability. This detection can
be done for two types of targets, non-fluctuating targets and fluctuating targets. In
practical cases, maximum targets are fluctuating in nature.
Analysis of false alarm rate can be a lead to the moderate value of threshold voltage. In
this thesis, comparative analysis is carried out between probability of detection (Pd) and
Constant False Alarm Rate (CFAR) for four different types of Swerling model.
Conventional Cell Averaging CFAR is used here for the simulation.
In order to maintain a constant probability of false alarm the threshold value must be
continuously updated based on the estimates of the noise variance. In this research,
comparison is carried for CFAR loss versus gamma function for four types of Swerling
model. Pulse compression is also introduced in this research by adding frequency
modulation to a long pulse at transmission and by using a matched filter receiver in order
to compress the received signal.
Further, performance analysis of detection capability of RADAR is found out for
atmospheric attenuation in this research work by carrying out simulations with different
system parameters. Comparison of results is also carried out with existing literature to
validate the analytical approach. |
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