Q. In digital communication system, in order to increase noise immunity, it is necessary to increase _________

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Q. Which of the following is the ratio of signal energy per bit to noise power spectral density?

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Q. Increasing the data rate implies the increase in pulse width of digital symbol.

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Q. Which of the following is the ratio of the throughput data rate per Hertz?

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Q. Which of the following is defined as the range of frequencies over which the signal has a non zero power spectral density?

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Q. _______ is equal to width of main spectral lobe.

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Q. Half power bandwidth is also called ______

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Q. Intersymbol interference (ISI) leads to ________ probability of the receiver for making an error in detecting the symbols.

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Q. ISI is ________ by increasing channel bandwidth.

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Q. Why is pulse shaping technique used?

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Q. Who was the first to solve the problem of ISI?

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Q. According to Nyquist, the impulse response of the overall communication system should have ______ decay with _______ magnitude for sample values not equal to zero.

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Q. Raised cosine filter does not satisfy Nyquist criteria.

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Q. As the roll off factor in raised cosine rolloff filter __________ the occupied bandwidth ________

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Q. Gaussian pulse shaping filter follows Nyquist criterion.

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Q. Gaussian filter has zero crossings at adjacent symbol peaks.

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Q. Which of the following is true for a Gaussian filter?

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Q. Gaussian pulse shaping filter reduces the spectral occupancy and ISI.

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Q. Gaussian pulses are used when cost and power efficiency are major factors.

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Q. In linear modulation technique __________ of transmitted signal varies linearly with modulating digital signal.

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