In MPSK adding new signals _______ make it vulnerable to noise and in MFSK _______ make it vulnerable.
1.Does, does not
2.Does not, does
3.Does, does
4.Does not, does not
Posted Date:-2022-05-21 08:20:20
According to reciprocity theorem, _____ and _____ are identical.
1.Transmitting power and receiving power
2.Transmitting gain and receiving gain
3.Effective area and physical area
4.None of the mentioned
Posted Date:-2022-05-21 08:33:28
AM-to-AM conversion brings about
1.Amplitude variation
2.Phase variation
3. Frequency variation
4.None of the mentioned
Posted Date:-2022-05-21 08:50:58
AM-to-PM conversion brings about
1.Amplitude variation
2. Phase variation
3.Frequency variation
4.None of the mentioned
Posted Date:-2022-05-21 08:51:30
Antenna gain ______ as effective area increases.
1.Increases
2.Decreases
3.Remains same
4.None of the mentionedv
Posted Date:-2022-05-21 08:34:47
Antenna’s efficiency is given by the ratio of
1.Effective aperture to physical aperture
2.Physical aperture to effective aperture
3.Signal power to noise power
4.Losses
Posted Date:-2022-05-21 08:31:55
Antennas are used
1.As transducer
2.To focus
3.As transducer & To focus
4.None of the mentioned
Posted Date:-2022-05-21 08:29:57
Antipodal signals are
1.Mirror images
2.1800 apart
3.One is negative of the other
4.All of the mentioned
Posted Date:-2022-05-21 08:58:26
As limit of k increases, the ratio of PB/PE becomes
1.1:2
2.2:1
3.1:3
4.3:1
Posted Date:-2022-05-21 08:26:29
Atmospheric window region is used for
1.Satellite communication
2.Deep-space communication
3.Satellite & Deep-space communication
4.None of the mentioned
Posted Date:-2022-05-21 08:48:03
Automatic repeat request is also called as
1.Forward error correction
2.Backward error correction
3.Forward & Backward error correction
4.None of the mentioned
Posted Date:-2022-05-21 08:43:00
Channel coding relates to area such as
1.Waveform coding
2.Structured sequence
3.Waveform coding & Structured sequence
4.None of the mentioned
Posted Date:-2022-05-21 08:57:01
Check-sum scheme has
1.Check bits
2.Parity bits
3.Longitudinal redundancy bits
4.All of the mentioned
Posted Date:-2022-05-21 08:44:12
Effective radiated power of an isotropic radiator can be given as a product of
1.Radiated power and received power
2.Effective area and physical area
3.Transmitted power and transmitting gain
4.Receiving power and receiving gain
Posted Date:-2022-05-21 08:32:43
Energy per symbol Es is given as
1.Es=Eb(log2M)
2.Es=Eb/(log2M)
3.Es=2Eb(log2M)
4.Es=Eb/2(log2M)
Posted Date:-2022-05-21 08:24:36
Error detection is realized using
1.Hash function
2.Check sum
3.Hash function & Check sum
4.None of the mentioned
Posted Date:-2022-05-21 08:43:35
Example of block code is
1.Hamming code
2.Reed-solomon code
3.Repetition code
4.All of the mentioned
Posted Date:-2022-05-21 08:44:44
Examples of structured sequences are
1.Block codes
2.Convolutional codes
3.Turbo codes
4.All of the mentioned
Posted Date:-2022-05-21 08:57:47
Field of view is ______ to antenna gain.
1.Proportional
2.Inversely proportional
3.Half the
4. Double
Posted Date:-2022-05-21 08:34:14
For FSK signalling, WT is equal to
1.0
2.1
3.0.737
4.Infinity
Posted Date:-2022-05-21 08:23:58
Hybrid automatic repeat request is a combination of
1.ARQ and error correction code
2.ARQ and error detection code
3.Error detection and correction codes
4.One of the mentioned
Posted Date:-2022-05-21 08:42:27
In analog receivers, noise bandwidth is _________ signal bandwidth.
1.Lesser than
2.Greater than
3.Equal to
4.Not related View Answer
Posted Date:-2022-05-21 08:38:56
In continuous ARQ will pullback uses _____ system.
1.Half duplex
2.Full duplex
3.Simplex
4.None of the mentioned
Posted Date:-2022-05-21 08:41:18
In orthogonal signalling with symbols containing more number of bits we need ____ power.
1.More
2.Less
3.Double
4.None of the mentioned
Posted Date:-2022-05-21 08:22:45
In which repeaters uplink is decoupled from the downlink?
1.Regenerative
2.Non regenerative
3.Regenerative & Non regenerative
4.None of the mentioned
Posted Date:-2022-05-21 08:50:27
In which system, bit stream is portioned into even and odd stream?
1.BPSK
2.MSK
3.QPSK
4.FSK
Posted Date:-2022-05-21 08:18:54
Link budget can help in predicting
1.Equipment weight and size
2.Technical risk
3.Prime power requirements
4.All of the mentioned
Posted Date:-2022-05-21 08:27:57
Link budget consists of calculation of
1.Useful signal power
2.Interfering noise power
3.Useful signal & Interfering noise power
4.None of the mentioned
Posted Date:-2022-05-21 08:27:16
M-ary signalling produces _______ error performance with orthogonal signalling and _______ error performance with multiple phase signalling.
1.Degraded, improved
2.Improved, degraded
3.Improved, improved
4.Degraded, degraded
Posted Date:-2022-05-21 08:17:44
Mechanism contributing to a reduction in efficiency is called as
1.Amplitude tapering
2.Blockage
3.Edge diffraction
4.All of the mentioned
Posted Date:-2022-05-21 08:30:29
Noise figure is a parameter that represents a ______ of the system.
1.Noisiness
2.Efficiency
3.Maximum output
4.Maximum power handling capacity
Posted Date:-2022-05-21 08:46:06
Noise figure measures the
1.Power degradation
2.Noise degradation
3.SNR degradation
4.None of the mentioned
Posted Date:-2022-05-21 08:45:34
Path loss Ls is dependent on
1.Signal power
2.Effective area
3.Wavelength
4. Antenna size
Posted Date:-2022-05-21 08:36:45
Space loss occurs due to a decrease in
1.Electric field strength
2.Efficiency
3.Phase
4.Signal power
Posted Date:-2022-05-21 08:31:16
The beam-width becomes narrower on
1.Increasing frequency
2.Increasing antenna size
3.Increasing frequency & antenna size
4.None of the mentioned
Posted Date:-2022-05-21 08:35:24
The error performance of MPSK ______ as M or k increases.
1.Increases
2.Decreases
3.Stays constant
4.None of the mentioned
Posted Date:-2022-05-21 08:19:37
The link availability measures the percentage of time the link can be ______
1.Open
2.Closed
3.Used
4.None of the mentioned
Posted Date:-2022-05-21 08:39:40
The relation between the probability of bit error and probability of symbol error in M-ary orthogonal signalling is
1.M/M-1
2.2M/M-1
3.(M/2)/M-1
4.M/M+1
Posted Date:-2022-05-21 08:25:24
The space window region ranges from
1.1GHz to 10 GHz
2.10GHz to 100GHZ
3.5GHz to 50GHz
4. 1MHz to 10MHz
Posted Date:-2022-05-21 08:47:19
The stop and wait ARQ needs _______ connection.
1.Half duplex
2.Full duplex
3.Simplex
4.None of the mentioned
Posted Date:-2022-05-21 08:40:44
Thermal noise is generated due to
1.Lossy coupling
2.Lossless coupling
3.Lossy & Lossless coupling
4.None of the mentioned
Posted Date:-2022-05-21 08:37:20
Visibility is ________ to required availability.
1.Proportional
2.Inversely proportional
3.Equal
4.Not related
Posted Date:-2022-05-21 08:40:13
What are the functions of non-regenerative repeaters?
1.Amplifies
2.Re transmits
3.Amplifies & Re transmits
4.None of the mentioned
Posted Date:-2022-05-21 08:49:51
What are the functions of satellite repeaters?
1.Re transmits
2.Regenerates
3.Reconstitutes
4.All of the mentioned
Posted Date:-2022-05-21 08:49:03
When two networks are connected in series, its composite noise figure can be given as
1.F1+(F2-1)/G1
2.F1-(F2-1)/G1
3.F2+(F1-1)/G1
4.F1G1+(F2-1)
Posted Date:-2022-05-21 08:46:44
Which factor adds phase noise to the signal?
1.Jitter
2.Phase fluctuations
3.Jitter & Phase fluctuations
4. None of the mentioned
Posted Date:-2022-05-21 08:29:15
Which is more vulnerable to noise?
1.2-ary system
2.4-ary system
3.Binary system
4.None of the mentioned
Posted Date:-2022-05-21 08:18:22
Which is the primary cost for degradation of error performance?
1.Loss in signal to noise ratio
2.Signal distortion
3.Signal distortion & Loss in signal to noise ratio
4.None of the mentioned
Posted Date:-2022-05-21 08:28:40
Which method requires less redundancy?
1.Error detection
2.Error correction
3.Error detection & correction
4.None of the mentioned
Posted Date:-2022-05-21 08:41:52
Which parameter is referred to as receiver sensitivity?
1.S/N ratio
2.G/T ratio
3.EIRP
4.PR/N0
Posted Date:-2022-05-21 08:48:32