Top 150+ Solved Digital Communication MCQ Questions Answer
Q. Frequency hopping involves a periodic change of transmission
a. signal
b. frequency
c. phase
d. amplitude
Q. The bandwidth of the channel used in the hopset is called
a. hopping bandwidth
b. total hopping bandwidth
c. instantaneous bandwidth
d. 3 db bandwidth
Q. The processing gain of FH systems is given by ratio of
a. hopping bandwidth and hopping period
b. instantaneous bandwidth and hopping duration
c. 3 db bandwidth and bit rate
d. total hopping bandwidth and instantaneous bandwidth
Q. In FH-SS which of the following Modulation Demodulation Technique has been used
a. bpsk
b. fsk
c. ask
d. qam
Q. In DS-SS which of the following Modulation Demodulation Technique has been used
a. bpsk
b. fsk
c. ask
d. qam
Q. Frequency division multiple access (FDMA) assigns channels to users.
a. individual, individual
b. many, individual
c. individual, many
d. many, many
Q. The symbol time in FDMA systems is thus intersymbol interference is
a. large, high
b. small, low
c. small, high
d. large, low
Q. Due to transmission scheme bits are needed for overhead in FDMA systems.
a. continuous, few
b. discontinuous, few
c. continuous, many
d. discontinuous, many
Q. Which of the following is not true for TDMA?
a. single carrier frequency for single user
b. discontinuous data transmission
c. no requirement of duplexers
d. high transmission rates
Q. Because of transmissions in TDMA, the handoff process in
a. continuous, complex
b. continuous, simple
c. discontinuous, complex
d. discontinuous, simple