COMP4336/9336 Mobile data networking W9 Quiz: RF Sensing
1. What is the resolution of an FMCW radar utilising the frequency band 77GHz- 81GHz?
c) 30cm d) 60cm e) 90cm
2. What is the resolution of pulse radar operating with 100ns pulses? a) 5m
d) 20m e) 100m
3. A 60GHz radar is likely to
a) Have better resolution than a 24GHz radar
b) Have worse resolution than a 24GHz radar
c) Have better resolution than a 77GHz radar
d) Have a resolution on the order of a few ¦Ìm
e) None of these
4. For a CSI=3+j4, the amplitude response is
e) None of these
5. More subcarriers per channel means
a) More CSI values available per packet
b) More RSS values available per packet
c) More CSI and more RSS values available per packet
d) More RSS values but less CSI values available per packet
e) More CSI values but less RSS values available per packet
6. Which of the following statements is true?
a) Pulse radars estimate range by sending chirps.
b) FMCW radars estimate range by transmitting ultra-short pulses
c) FMCW radars transmit signals whose frequency changes over time
d) FMCW radars cannot work with mmWave signals
e) Pulse bandwidth increases proportionally with increasing pulse width
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a) b) c) d) e)
An UWB radar operating in the band 1.5GHz-2.5GHz can separate two objects along the same bearing if
The difference of distances of the two objects from the radar is 10cm
The difference of distances of the two objects from the radar is 12cm
The difference of distances of the two objects from the radar is 16cm The difference of distances of the two objects from the radar is less than 15cm The difference of distances of the two objects from the radar is less than 10cm
Radars are often used for both communication and sensing. True
RSS can detect more fine-grained human activities compared to CSI True
10. CSI is used by radars to detect and estimate the range of target objects. a) True
End of W9 Quiz
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