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Q.1
synchronization overhead is required in TDMA due to transmission.
high, burst
high, continuous
low, burst
no, burst
Q.2
Because of transmissions in TDMA, the handoff process in
continuous, complex
continuous, simple
discontinuous, complex
discontinuous, simple
Q.3
Which of the following is not true for TDMA?
single carrier frequency for single user
discontinuous data transmission
no requirement of duplexers
high transmission rates
Q.4
is based on FDMA/FDD.
gsm
w-cdma
cordless telephone
amps
Q.5
Due to transmission scheme bits are needed for overhead in FDMA systems.
continuous, few
discontinuous, few
continuous, many
discontinuous, many
Q.6
The bandwidth of FDMA channel is
wide
narrow
large
zero
Q.7
The symbol time in FDMA systems is thus intersymbol interference is
large, high
small, low
small, high
large, low
Q.8
The FDMA channel carries phone circuit at a time.
ten
two
one
several
Q.9
Frequency division multiple access (FDMA) assigns channels to users.
individual, individual
many, individual
individual, many
many, many
Q.10
In DS-SS which of the following Modulation Demodulation Technique has been used
bpsk
fsk
ask
qam
Q.11
In FH-SS which of the following Modulation Demodulation Technique has been used
bpsk
fsk
ask
qam
Q.12
Pseudorandom signal predicted.
can be
cannot be
maybe
none of the mentioned
Q.13
What is the set of possible carrier frequencies in FH-SS?
hopset
hop
chips
symbols
Q.14
Performance of BFSK signal is than BPSK.
3db worse
3db better
6db worse
6db better
Q.15
The relation between the probability of bit error and probability of symbol error in M-ary orthogonal signalling is
m/m-1
2m/m-1
(m/2)/m-1
m/m+1
Q.16
Energy per symbol Es is given as
es=eb(log2m)
es=eb/(log2m)
es=2eb(log2m)
es=eb/2(log2m)
Q.17
In orthogonal signalling with symbols containing more number of bits we need power.
more
less
double
none of the mentioned
Q.18
In MPSK adding new signals make it vulnerable to noise and in MFSK make it vulnerable.
does, does not
does not, does
does, does
does not, does not
Q.19
The error performance of MPSK as M or k increases.
increases
decreases
stays constant
none of the mentioned
Q.20
Autocorrelation is a function which matches
two same signals
two different signal
one signal with its delayed version
none of the mentioned
0 h : 0 m : 1 s
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