Interference in cellular systems is caused by
Interference in frequency bands may lead to
Co-channel reuse ratio depends upon
Increase in Co- channel reuse ratio indicates
The techniques used to improve the capacity of cellular systems are
Distributed antenna systems are used at
Fading’s caused due to
1. Multi path propagation
2. Obstacles
3. Frequency variations at the source
4. Variation in amplitude and phase at receiver
Coherence time refers to
Fading due to shadowing is
Deep fade is
1. Strong destructive interference
2. Drop in signal to noise ratio
3. Temporary failure of message transfer
Doppler spread refers to
Friis free space equation
1. Is an expression for noise power
2. Is a function of transmitting and receiving antenna gain
3. Depends upon the distance between transmitting and receiving antenna
The free space model of propagation refers to
1. Unobstructed line of sight between the transmitter and receiver
2. Satellite communication systems and Microwave line of sight radio links
3. Propagation along the ground surface
According to Friis free space equation
1. Received power falls with square of the distance between the transmitter and receiver
2. Increases with square of the distance between the transmitter and receiver
3. Received power increases with gains of transmitting and receiving antennas
EIRP is
1. Effective Isotropic Radiated Power
2. Maximum radiated power available by the transmitter
3. A factor of power and gain of transmitter
Spread spectrum modulation involves
1. PN sequence for modulation
2. Large bandwidth
3. Multiple users
PN sequence at the decoder acts as a locally generated carrier at the receiver and decodes the signal using
In spread spectrum technique, the multiple users are assigned with
Fast hopping is
Slow frequency hopping refers to
Probability of outage refers to
The digital modulation technique used in frequency selective channels is
Working of Adaptive Equalizers include
The time span for which the equalizer converges depends upon
1. Equalizer algorithm
2. Equalizer structure
3. Rate of change of multipath radio channel
4. Amplitude of signal
The Linear Equalizer may be implemented as
