Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
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RF Cafe Quiz #29
All RF Cafe Quizzes make great fodder for
employment interviews for technicians or engineers - particularly those who are
fresh out of school or are relatively new to the work world. Come to think of it,
they would make equally excellent study material for the same persons who are going
to be interviewed for a job. Bonne chance, Viel Glück, がんばろう,
buena suerte, удачи, in bocca al lupo, 행운을 빕니다,
ádh mór, בהצלחה, lykke til, 祝你好運.
Well, you know what I mean: Good luck!
Click here for the complete list of
RF Cafe Quizzes.
Note: Some material based on books have
quiz is based on the information presented in Cognitive Radar: The Knowledge-aided Fully Adaptive Approach , by
Joseph R. Guerci. Published by Artech House.
Note: Some of these books are
available as prizes in the monthly RF Cafe
1. What is meant by "cognitive" radar?
a) Ability to ignore non-relevant to
enhance relevant targets
b) Ability to display all targets
c) Using cogs and cams for antenna drive
Using static database for object de-cluttering
2. What are 3 examples of
applications for cognitive radar?
a) Removal of heterogeneous clutter, manmade structures, non-stationary
b) UAV control, moon-bounce ranging, border protection
c) Explosives detection, mm-scale measurement, food preservation
d) Weather forecasting, cancer treatment,
3. What is an intelligent method to overcome memory access latency
a) Use faster data bus
b) Use more memory
c) Use faster processor
d) Use look-ahead
4. What does the acronym SINR stand for?
a) SIgnal Nulling and
b) Signal-to-Interference-plus-Noise Ratio
c) Static Incidental Noise amelioRation
5. What is signal "whitening?"
a) Electronically "bleaching" a signal
b) Applying the algorithm devised by A.D. White
c) Making the target brighter on the radar display
d) Removing the "color," or non-randomness components of
6. How does multipath affect a radar signal?
a) False range
b) False speed measurements
c) Ghost images
d) All of the above
7. What is a primary feature of MIMO (Multi-Input-Multi-Output) radar?
Both Tx and Rx are optimized
b) Multiple inputs
c) Multiple outputs
d) Low power requirement
8. Which channel characteristics generally depend on the transmit spatio-temporal
a) Transmit-dependent channel estimation
b) Receive-dependent channel estimation
c) Channel ordering
d) Pulse repetition interval (PRI)
9. What information
does Doppler provide?
10. Who is the author of "Cognitive Radar?" (don't look back at the top of the page)
a) Alberto Gomez
b) Arthur Blatt
c) Joseph Guerci
d) Robert Pease
Need some help? Click here for the
answers and explanations.