Advantages of digital communication are
1.Easy multiplexing
2.Easy processing
3.Reliable
4.All of the mentioned
Posted Date:-2022-05-17 09:32:24
Analog to digital conversion includes
1.Sampling
2.Quantization
3.Sampling & Quantization
4.None of the mentioned
Posted Date:-2022-05-17 09:41:21
As the order of the filter increases, the cost ______ and complexity ______
1.Increases, increases
2.Increases, decreases
3. Decreases, increases
4.Decreases, decreases
Posted Date:-2022-05-17 09:08:35
Capacity of a channel can be increased by
1.Increasing channel bandwidth
2.Increasing signal power
3.Increasing channel bandwidth &signal power
4.None of the mentioned
Posted Date:-2022-05-17 09:27:00
Capacity of the channel can be increased by reducing in band noise power.
1.True
2.False
Posted Date:-2022-05-17 09:27:28
Digital communication is _______ to environmental changes?
1.Less sensitive
2.More sensitive
3.Does not depend
4.None of the mentioned
Posted Date:-2022-05-17 09:31:34
Digital communication system can handle
1.Analog signals
2. 1D signals
3.2D signals
4.All of the mentioned
Posted Date:-2022-05-17 09:48:51
Digital system includes
1.Better encryption algorithm
2.Difficult data multiplexing
3.All of the mentioned
4.None of the mentioned
Posted Date:-2022-05-17 09:40:36
Eigen functions are not orthogonal.
1.True
2.False
Posted Date:-2022-05-17 09:21:56
Examples of digital communication are
1.ISDN
2.Modems
3.Classical telephony
4.All of the mentioned
Posted Date:-2022-05-17 09:34:15
Find the 32-ary waveform for the word ‘HAPPY’.
1.280856
2.658082
3.288056
4.None of the mentioned
Posted Date:-2022-05-17 09:06:04
Find the 8-ary waveform for the word ‘HAPPY’.
1.4040020246
2.0440020246
3. 6420200440
4.None of the mentioned
Posted Date:-2022-05-17 09:05:22
Flicker noise is called as
1.White noise
2.Pink noise
3.Brown noise
4.None of the mentioned
Posted Date:-2022-05-17 09:24:53
Matched filter can also be used as least squares estimator.
1.True
2.False
Posted Date:-2022-05-17 09:48:03
Matched filter is
1.Linear
2.Non linear
3.Linear & Non linear
4.None of the mentioned
Posted Date:-2022-05-17 09:30:12
Matched filter technique is used to
1.Increase SNR
2.Decrease SNR
3. SNR is not affected
4.None of the mentioned
Posted Date:-2022-05-17 09:47:25
Matched filtering operation includes
1.Spectral phase matching
2.Spectral amplitude matching
3.Spectral phase & amplitude matching
4.None of the mentioned
Posted Date:-2022-05-17 09:29:37
Shot noise is avoidable when current is
1.Zero
2.One
3.Infinity
4.None of the mentioned
Posted Date:-2022-05-17 09:23:18
Shot noise is produced by
1.Electrons
2.Photons
3.Electrons & Photons
4.None of the mentioned
Posted Date:-2022-05-17 09:22:37
SQNR can be improved by _______ sampling rate.
1.Increasing
2.Decreasing
3.Does not depend
4.None of the mentioned
Posted Date:-2022-05-17 09:10:37
Synchronization available in digital communication are
1.Symbol synchronization
2.Frame synchronization
3.Carrier synchronization
4.All of the mentioned
Posted Date:-2022-05-17 09:39:45
The attenuation level in bounded power spectral density is
1.35
2.50
3.35 & 50
4.none of the mentioned
Posted Date:-2022-05-17 09:36:15
The basic transmission-reception system is a ______ system.
1.Two block system
2.Three block system
3.Four block system
4.None of the mentioned
Posted Date:-2022-05-17 09:51:19
The equivalent temperature in a receiver design must be kept
1.Low
2.High
3.Does not affect the receiver
4.None of the mentioned
Posted Date:-2022-05-17 09:44:08
The information source of a digital communication system can be
1.Packetized
2.Continuous
3.Packetized & Continuous
4.None of the mentioned
Posted Date:-2022-05-17 09:49:35
The interval of frequencies outside which the spectrum is zero is called as ________
1.null to null bandwidth
2.normalized bandwidth
3.absolute bandwidth
4.none of the mentioned
Posted Date:-2022-05-17 09:35:38
The maximum likelihood function is
1.Positive
2.Negative
3.Any of the mentioned
4.None of the mentioned
Posted Date:-2022-05-17 09:29:00
The measure of the width of the main lobe is called as ________
1.Null to null bandwidth
2.Half power bandwidth
3.Normalized bandwidth
4.Absolute bandwidth
Posted Date:-2022-05-17 09:09:48
The point at which the output signal power has fallen to 0.707 of its peak value is called as _____
1.3db point
2.Half power point
3.3db & Half power point
4.None of the mentioned
Posted Date:-2022-05-17 09:07:22
The ratio of the filter bandwidth at -60db and -6db amplitude response point is called as _____
1.Half point factor
2.Normalized factor
3.Shape factor
4.None of the mentioned
Posted Date:-2022-05-17 09:07:58
Thermal noise is a wide sense stationary process.
1.True
2.False
Posted Date:-2022-05-17 09:28:27
Transmission media used for medium frequency band are
1.Coaxial cable
2.Copper cable
3.Optical fiber
4.All of the mentioned
Posted Date:-2022-05-17 09:46:49
Transmission media used in low frequency band are
1.Air
2.Water
3.Copper cable
4.All of the mentioned
Posted Date:-2022-05-17 09:46:13
Two functions are called as orthogonal if on integrating the product we get
1.One
2.Zero
3.Infinity
4. None of the mentioned
Posted Date:-2022-05-17 09:21:24
What are the characteristics of an ideal transmission line?
1.Different amplitude
2.No distortion
3.Time delay
4.All of the mentioned
Posted Date:-2022-05-17 09:06:43
What are the disadvantages of digital communication?
1.Needs more bandwidth
2.Is more complex
3.Needs more bandwidth & Is more complex
4.None of the mentioned
Posted Date:-2022-05-17 09:33:38
What are the main features of a receiver?
1.Synchronization
2.Multiple parallel receiver chain
3.Synchronization & Multiple parallel receiver chain
4.None of the mentioned
Posted Date:-2022-05-17 09:42:11
What are the main features of a transmitter?
1.Higher clock speed
2.Linear power amplifier
3.Directional antennas
4.All of the mentioned
Posted Date:-2022-05-17 09:45:37
What conditions must be fulfilled in a good digital communication system?
1.High data rate
2. High fidelity
3.Low transmit power
4.All of the mentioned
Posted Date:-2022-05-17 09:42:53
What is necessary for digital communication?
1.Precision timing
2.Frame synchronization
3.Character synchronization
4.All of the mentioned
Posted Date:-2022-05-17 09:33:01
Which are the common transmission media used in digital communication system?
1.Coaxial cable
2.Twisted copper cable
3.Radio frequency bands
4.All of the mentioned
Posted Date:-2022-05-17 09:50:40
Which consists of less ISI?
1.Nyquist filter
2.Raised cosine filter
3.Nyquist & Raised cosine filter
4.None of the mentioned
Posted Date:-2022-05-17 09:30:50
Which corrects the sampling time problem in a digital system?
1.Interpolator
2.Decimator
3.Equalizer
4.Filter
Posted Date:-2022-05-17 09:44:59
Which filter has maximum flatness?
1.Chebyshev filter
2.Butter-worth filter
3.High pass filter
4.Normalized filter
Posted Date:-2022-05-17 09:09:12
Which has the same power spectral density?
1.White noise
2.Brown noise
3.White & Brown noise
4.None of the mentioned
Posted Date:-2022-05-17 09:25:36
Which noise is useful for dithering?
1.White noise
2.Pink noise
3.Brown noise
4.None of the mentioned
Posted Date:-2022-05-17 09:26:17
Which occurs due to equilibrium fluctuations?
1.Thermal noise
2.Johnson noise
3.Thermal & Johnson noise
4.None of the mentioned
Posted Date:-2022-05-17 09:24:14
Which offers better SQNR?
1.Delta modulation
2.PCM
3.Delta modulation & PCM
4.None of the mentioned
Posted Date:-2022-05-17 09:14:33
Which system uses digital transmission?
1.ISDN
2.LANs
3.ISDN & LANs
4.None of the mentioned
Posted Date:-2022-05-17 09:35:01
Wired channels are
1.Lossy
2.Lossless
3.Lossy & Lossless
4.None of the mentioned
Posted Date:-2022-05-17 09:43:32