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Introduction To Satellite Communication – 2 – 8

86. While discussing sharing of a communication satellite by many geographically dispersed earth station, DAMA means :

(a) Demand-assigned multiple access
(b) Decibel attenuated microwave antenna
(c) Digital analog master antenna
(d) Dynamically-assigned multiple access

ANSWER

EXPLANATION

87. Intermodulation distortion is present in

(a) FDMA
(b) TDMA
(c) CDMA
(d) Both a and b

ANSWER

EXPLANATION

88. Name of the multiple access technique in which full bandwidth is used for full time by all users is :

(a) FDMA
(b) CDMA
(c) TDMA
(d) None of these

ANSWER

EXPLANATION

89. With reference to transponder capacity utilization in case of TDMA and FDMA techniques :

(a) the capacity utilization is almost 100% irrespective of number of accesses in TDMA
(b) The capacity utilization can never be 100% in FDMA
(c) The capacity utilization is 100% in TDMA for a single access only
(d) None of these

ANSWER

EXPLANATION

90. Process gain of spread spectrum communication is defined as :

(a) Difference between output and input carrier to noise ratio
(b) The different between output and input signal to noise ratio
(c) The difference between output signal to input carrier noise ratio
(d) None of these

ANSWER

EXPLANATION

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