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
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