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51. A RAKE receiver collects the __________ versions of the original signal.
a. Time shifted
b. Amplitude shifted
c. Frequency shifted
d. Phase shifted
Discuss
Answer: (a).Time shifted

52. RAKE receiver uses separate _________ to provide the time shifted version of the signal.
a. IF receiver
b. Equalizer
c. Correlation receiver
d. Channel
Discuss
Answer: (c).Correlation receiver

53. Each correlation receiver in RAKE receiver is adjusted in ____________
a. Frequency shift
b. Amplitude change
c. Phase shift
d. Time delay
Discuss
Answer: (d).Time delay

54. The range of time delays that a particular correlator can search is called ________
a. Search window
b. Sliding window
c. Time span
d. Dwell time
Discuss
Answer: (a).Search window

55. RAKE receiver is used for _______ technique.
a. CDMA
b. TDMA
c. FDMA
d. OFDM
Discuss
Answer: (a).CDMA

56. A RAKE receiver uses __________ to separately detect the M strongest signals.
a. Single correlator
b. Multiple correlator
c. Single IF receiver
d. Multiple IF receivers
Discuss
Answer: (b).Multiple correlator

57. In a RAKE receiver, if the output from one correlator is corrupted by fading, all the other correlator’s output are also corrupted.
a. True
b. False
c. May be True or False
d. Can't say
Discuss
Answer: (b).False

58. A RAKE receiver uses __________
a. Equalization
b. Channel coding
c. Diversity
d. Encryption
Discuss
Answer: (c).Diversity

59. Interleaving is used to obtain ___________ diversity.
a. Time
b. Frequency
c. Polarization
d. Antenna
Discuss
Answer: (a).Time

60. In block codes, parity bits are ___________ to block of messages.
a. Added
b. Subtracted
c. Multiplied
d. Divided
Discuss
Answer: (a).Added

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