Q.1.
US AMPS,channels are allocated to various operators withkHz guard band and channel between them iskHz. What is the spectrum allocation given to each operator?
Q.2.
Based on FDMA/FDD.
Q.3.
Undesired RF radiation.
Q.4.
Of the following is not true for FDMA systems as compared to TDMA systems?
Q.5.
Bandwidth of FDMA channel is
Q.6.
The FDMA channel is not in use, it can be used by other users.
Q.7.
Division multiple access (FDMA) assigns              channels to                 users.
Q.8.
Duration is shorter?
Q.9.
Frequency hopping is
Q.10.
Are the
Q.11.
Gives the inability of a signal to withstand the impairments.
Q.12.
Type of demodulator is used in the frequency hopping technique?
Q.13.
Which technique is phase coherence hard to maintain?
Q.14.
System allows larger processing gain?
Q.15.
Minimum spacing between consecutive hop positions gives the
Q.16.
Processing gain is given as              modulation scheme.
Q.17.
Modulation scheme is preferred for direct sequence spread spectrum process?
Q.18.
Gain is given as
Q.19.
Is defined as
Q.20.
Direct sequence process which step is performed first?