What is echo signal in radar?
"Noun. 1. radar echo - an electronic signal that has been reflected back to the radar antenna; contains information about the location and distance of the reflecting object. electronic signal - a signal generated by electronic means. Radar echo - definition of radar echo by The Free Dictionary" https://www.thefreedictionary.com › radar+echo
How does power density of the echo signal differ from the received power by the radar? Conceptually and in the equations?
Ans: Ae = effective area of the receiving antenna
What is the relation between G (Gain in the direction of target) and Ae? Any explanation of the equation and relation?
What are the units of the parameters in the equations?
What is the symbol used for Wavelength?
How do you calculate the distance beyond what the target cannot be detected? i.e. Rmax, give the equation and explain
How can you achieve a long distance?
To get a long distance, will Pt need to be large?
To get a long distance, will radiated energy need to be concentrated into a narrow beam?
To get a long distance, will the received energy must be collected with a large antenna?
To get a long distance, will the receiver must be sensitive to weak signals?
Is the predicted radar range very accurate or usually optimistic? why or why not?
What are the parameters that can make the predicted radar range not very accurate?
Can you describe the maximum range of a Radar just by one number?
Is it true? radar range (max) must include probability, the target type, and range possible
What are the unpredictable or statistical parameters in the equation for max range?
Is Smin = minimum detectable signal predictable in the equation?
Is target cross section (sigma) predictable in the equation?
Are meteorological conditions predictable in the equation?
What do you mean by Smin = minimum detectable signal ? Any little details in any direction?
Is Smin = minimum detectable signal: affected by noise energy?
Does Smin = minimum detectable signal: also depend on the threshold set at the output of the receiver? Why is the threshold there? What happens if you lower the threshold? Does low threshold mean less perfection?
Where does noise in the receiver originate from? Can the receiver itself introduce noise? What can be different sources of noise?
What is thermal noise power? Give the equation. Explain the concept and the equation. k* T * Bn, T in kelvin
Half-power bandwidth? Noise bandwidth? 3-DB bandwidth : what are these? What is the relation with Bn or thermal noise power if any?
What are the different sources of noise?
Galactic, Solar, Atmosphere, man made, Ground, Receiver
True or false? Noise entering the filter is Gaussian
How does Rayleigh relates to the probability density of a narrowband IF filter?
Probability of false alarm: what is the equation? What is the relation with TNR (Thermal noise ratio) and Bandwidth? Give a diagram.
By
Sayed Ahmed
BSc. Eng. in Comp. Sc. & Eng. (BUET)
MSc. in Comp. Sc. (U of Manitoba, Canada)
MSc. in Data Science and Analytics (Ryerson University, Canada)
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