1) Which among the following exhibits a contributory role in an invention of CDMA system?
a. Unicomm
b. Dualcomm
c. Qualcomm
d. Pentacomm
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Answer
Explanation
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ANSWER: Qualcomm
Explanation:
No explanation is available for this question!
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2) Which compression coding scheme of vocoder in GSM has a provision of 13 kbps voice bit stream by allowing the transmission of eight telephone calls concurrently in a single 200-ku-wide channel?
a. Regular Pulse Excitation Linear Predictive Coding
b. Residual Excited Linear Predictive Coding
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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3) Which among the following can be used to analyze the frequency response of a room?
a. Spectrum Analyzer
b. Pink Noise Generator
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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4) A Gaussian filter plays an important role in shaping the serial digital bit stream into narrow signal bandwidth ________
a. Before modulation
b. During (at the time of) modulation
c. After modulation
d. None of the above
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Answer
Explanation
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ANSWER: Before modulation
Explanation:
No explanation is available for this question!
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5) Radio Fade Margin deals with the expression associated with the availability of margin between __________
a. Strength level of transmitted signal & receiver sensitivity of radio
b. Strength level of received signal & receiver sensitivity of radio
c. Strength level of transmitted signal & transmitter sensitivity
d. Strength level of transmitted signal & received signal
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Answer
Explanation
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ANSWER: Strength level of received signal & receiver sensitivity of radio
Explanation:
No explanation is available for this question!
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6) Which parameters are controlled by parametric or multi-band variable equalizers?
a. Amplitude
b. Center frequency
c. Bandwidth
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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7) Which among the below specified parameters is not associated with the designing of an optimal symbol set?
a. Channel bandwidth
b. Noise characteristics of channel and receiver
c. Desired Information Rate
d. Transmitter complexity
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Answer
Explanation
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ANSWER: Transmitter complexity
Explanation:
No explanation is available for this question!
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8) What should be the value of SINAD, if noise power, distortion power and the signal power are 11 dB, 10 dB and 13 dB respectively?
a. 99 dB
b. 106 dB
c. 120 dB
d. 150 dB
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Answer
Explanation
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ANSWER: 106 dB
Explanation:
No explanation is available for this question!
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9) Which among the below specified SINAD measurements indicates an ability of receiver for the demodulation of desired signal in the presence of strong interfering signal at the neighboring RF channel?
a. Reference Sensitivity
b. Adjacent Channel Rejection
c. Receiver Intermodulation
d. None of the above
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Answer
Explanation
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ANSWER: Adjacent Channel Rejection
Explanation:
No explanation is available for this question!
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10) What is the range of SINAD numbers associated with the threshold for reasonable intelligibility of voice especially in SINAD measurement system?
a. 12 dB to 20 dB
b. 22 dB to 30 dB
c. 32 dB to 40 dB
d. 42 dB to 50 dB
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Answer
Explanation
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ANSWER: 12 dB to 20 dB
Explanation:
No explanation is available for this question!
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