QUESTION 39 MIMO (multiple in, multiple out) antenna systems use multipath propa
ID: 3906824 • Letter: Q
Question
QUESTION 39
MIMO (multiple in, multiple out) antenna systems use multipath propagation modes to enhance signal strength and capacity.
True
False
QUESTION 40
Select the correct statement regarding antenna and electromagnetic (EM) wave polarization.
a. The electric (E) wave dictates the polarization of the EM wave
b. The magnetic (M) wave dictates the polarization of the EM wave
c. Only antennas that are vertically polarized can collect horizontally polarized EM wave
d. Circular polarization can only be created using a spinning transmit antenna
QUESTION 41
Which multiple access scheme requires the use of pseudorandom noise (PN) codes?
a. Frequency Division Multiple Access (FDMA)
b. Time Division Multiple Access (TDMA)
c. Code Division Multiple Access (CDMA)
d. Orthogonal Frequency Division Multiple Access (OFDMA)
QUESTION 42
While OFDMA is not a spread spectrum technology, it has similar characteristics in the frequency domain such as signal survivability in noisy RF environments.
True
False
Explanation / Answer
QUESTION 39: True QUESTION 40: a. The electric (E) wave dictates the polarization of the EM wave QUESTION 41: c. Code Division Multiple Access (CDMA) QUESTION 42: False