WIRELESS DIGITAL COMMUNICATION

The step size remains same

Step size varies according to the values of the input signal

The quantizer has linear characteristics

Both a and c are correct

Continuous in nature

Logarithmic in nature

Linear in nature

Discrete in nature

Delta modulation

PCM

DPCM

PAM

Accumulator

Sampler

PLL

Quantizer

Step size is too small

Step size is too large

There is interference from the adjacent channel

Bandwidth is too large

Delta modulation

Adaptive delta modulation

DPCM

PCM

Zero voltage

Negative voltage

Pulse is transmitted for half the duration

Both b and c are correct

The waveform has zero value for symbol '0'

The waveform has A volts for symbol '1'

The waveform has positive and negative values for '1' and '0' symbol respectively

Both a and b are correct

N times the sampling frequency

N times the modulating frequency

N times the nyquist criteria

None of the above

Relates the conditions in time domain and frequency domain

Helps in quantization

Limits the bandwidth requirement

Both a and c

Reduces inter symbol interference

Removes distortion caused due to channel

Is done using linear filters

All of the above

One bit per sample is transmitted

All the coded bits used for sampling are transmitted

The step size is fixed

Both a) and c) are correct

1 is transmitted by a positive pulse and 0 is transmitted by negative pulse

1 is transmitted by a positive pulse and 0 is transmitted by zero volts

Both a & b

None of the above

Smaller the number of discrete amplitudes

Larger the number of discrete amplitudes

Does not depend on amplitudes

None of the mentioned

MANCHESTER

POLAR RZ