Worksheets27.06.2020_EC8652 WC_MCQ TEST-5
Total questions: 30
Worksheet time: 30mins
Name
Class
Date
1.
1.MIMO is a _______________________ technology
a)
Multiple Antenna Transmission and ReceptionTechnique
b)
Multicarrier Modulation Technique
c)
Multi User Access Method
d)
Equalization Technique
2.
2.MIMO can be implemented at____________________
a)
Transmitter only
b)
Receiver only
c)
Both Transmitter and Receiver
d)
None of the above
3.
3. The ultimate goal of Multiple Antenna Techniques are to_______________________
a)
Increase Channel Capacity
b)
Decrease the number of users accessing the spectrum
c)
Reduce the noise
d)
Improve the gain
4.
4.The antennas at each end of the communications circuit are combined to ________________________.
a)
minimize errors
b)
optimize the data speed.
c)
both the above options
5.
5.The shannon's channel capacity theorem is mathematically represented as_________________
a)
C= W log_2 (1+S/N)
b)
C= W log_10 (1+S/N)
c)
C= W log_2 (S/N)
d)
C= W log_2 (1+S/N)^2
6.
6. SISO have the following correspondence between Number of Transmitters and Number of Receivers.
a)
one :one
b)
1:Nr
c)
Nt:1
d)
Nt:Nr
7.
7. MISO have the following correspondence between Number of Transmitters and Number of Receivers.
a)
one :one
b)
1:Nr
c)
Nt:1
d)
Nt:Nr
8.
8. SIMO have the following correspondence between Number of Transmitters and Number of Receivers.
a)
one :one
b)
1:Nr
c)
Nt:1
d)
Nt:Nr
9.
9. MIMO have the following correspondence between Number of Transmitters and Number of Receivers.
a)
one :one
b)
1:Nr
c)
Nt:1
d)
Nt:Nr
10.
10. The capacity of a SISO model is
a)
C= W log_2 (1+S/N)
b)
C= W log_2 (1+2*S/N)
c)
C= 2W log_2 (1+S/N)
d)
C= W log_2 (1+S/N)^2
11.
11. The capacity of a SIMO model is
a)
C= W log_2 (1+S/N)^2
b)
C= W log_2 (1+(Nt)S/N)
c)
C= 2W log_2 (1+S/N)
d)
C= W log_2 (1+S/N)^2
12.
12. The capacity of a MISO model is
a)
C= W log_2 (1+(Nt)S/N)
b)
C= W log_2 (1+(Nr)S/N)
c)
C= NrW log_2 (1+S/N)
d)
C= Nr log_2 (1+S/N)^2
13.
13. The capacity of a MIMO model is
a)
C= W log_2 (1+(Nt)(Nr)(S/N))
b)
C= W log_2 (1+(Nr)S/N)
c)
C= NrNt *W log_2 (1+S/N)
d)
C= Nr log_2 (1+S/N)^2
14.
14.In MIMO Receivers ____________is used to separate data received from differentpaths.
a)
Diversity Decoders
b)
Duplexers
c)
Frequency synthesizers
d)
PLL circuits
15.
15. The following are the advantages of MIMO implementation in communication systems. (select all the correct answers,if required)
a)
Improved Data rate
b)
Better noise performance
c)
Coverage improvement
d)
Capacity improvement
16.
16. Select the deployment methods for MIMO from the following.(select more than one option,if required)
a)
Spatial Diversity
b)
Spatial Multiplexing
c)
Dual reception
d)
Frequency divison multiplexing
17.
17. While calculating the diversity gain of a multiple antenna system, the multiplexing gain is assumed to be
a)
true
b)
false
18.
18. Multiplexing gain of a multiple antenna system is Ns =________________________
a)
min(NT,NR )
b)
max(NT,NR )
c)
mean(NT,NR )
d)
NT+NR+1
19.
19. While developing the MIMO system model the interlying wireless channel is assumed to be ___________
a)
a frequency selective fading channel
b)
rician fading
c)
gaussian channel
d)
quasistatic and flat
20.
20.To decrease the multiuserinterference and increase the data rate in MIMO system____________ is used.
a)
channel equaliser
b)
precoding
c)
channel guarding
d)
framing
21.
21. Any known interference at the transmitter canusually be subtracted without the penalty of radioresources if the optimal precoding scheme can beapplied on the transmit signal. - This principle is called__________________.
a)
Dual Encoding
b)
Dirty paper Coding
c)
Digital Precoding
d)
Golay coding
22.
22.Beam forming techniques can be used in any antennasystem, particularly in MIMO systems in order to create______________.
a)
Required gain
b)
Required radiation pattern
c)
High polarization
d)
Minimum sidelobes
23.
23.Beam forming results in drastic increase in ________ as there is a parallel channel decomposition
a)
SNR of the received signal
b)
Interference among multipath components
c)
Receiver's gain
d)
Receiver's Throughput
24.
24.The CSI at the transmitter is vital in MIMO systems in order toincrease the transmission rate, to enhance coverage, toimprove spectral efficiency and to reduce receiver complexity.
a)
false
b)
true
25.
25._____________ is the minimum transmission rate that is achieved over a certain fraction of time whose CSI is known.
a)
Outage Capacity
b)
Ergodic Capicity
c)
Statistical Capacity
d)
Shannon's capacity
26.
26.In MIMO, which among the following factor has the greatest influence on data rates?
a)
The size of antenna
b)
The height of the antenna
c)
The number of transmitter and receiver antennas
d)
The aperture area of receiver antennas
27.
27. _______ is a transmission method used in MIMO wireless communications to transmit encoded data signals independently.
a)
STTD
b)
SM
c)
Collaborative Uplink MIMO
d)
MU-MIMO
28.
28.MIMO technology can manipulate the inherent nature of multipath interference to either cancel or augment the signal at any physical location in the radio channel.
a)
true
b)
false
29.
29.The Massive MIMO is only usable at millimeter-wave frequencies.
a)
true
b)
false
30.
30.Equipping transmitters and receivers with MIMO capabilities can achieve increased diversity and multiplexing gains of wireless communication systems.
a)
true
b)
false
100 %
