Frequency Division Multiple Access (FDMA)

Wireless & Mobile Communications

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Frequency Division Multiple Access (FDMA)”.

1. Frequency division multiple access (FDMA) assigns ______ channels to _______ users.
a) Individual, individual
b) Many, individual
c) Individual, many
d) Many, many

2. During the period of call, other users can share the same channel in FDMA.
a) True
b) False

3. The FDMA channel carries ____________ phone circuit at a time.
a) Ten
b) Two
c) One
d) Several

4. If the FDMA channel is not in use, it can be used by other users.
a) True
b) False

5. The bandwidth of FDMA channel is ______
a) Wide
b) Narrow
c) Large
d) Zero

6. The symbol time in FDMA systems is _________ thus intersymbol interference is ______
a) Large, high
b) Small, low
c) Small, high
d) Large, low

7. Due to _________ transmission scheme __________ bits are needed for overhead in FDMA systems.
a) Continuous, few
b) Discontinuous, few
c) Continuous, many
d) Discontinuous, many

8. Which of the following is not true for FDMA systems as compared to TDMA systems?
a) Low complexity
b) Lower cell site system cost
c) Tight RF filtering
d) Narrow bandwidth

9. __________ is undesired RF radiation.
a) Intermodulation frequency
b) Intermediate frequency
c) Instantaneous frequency
d) Instrumental frequency

10. __________ is based on FDMA/FDD.
a) GSM
c) Cordless telephone

11. In US AMPS, 416 channels are allocated to various operators with 10 kHz guard band and channel between them is 30 kHz. What is the spectrum allocation given to each operator?
a) 12.5 kHz
b) 30 kHz
c) 12.5 MHz
d) 30 MHz

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