Q. Consider the below figure. What are the bits transmitted for the Unipolar system?

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Q. If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?

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Q. Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?

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Q. A digitized voice channel is made by digitizing a 4-kHz bandwidth analog voice signal. We need to sample the signal at twice the highest frequency (two samples per hertz). We assume that each sample requires 8 bits. What is the required bit rate?

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Q. What is the bit rate for high-definition TV (HDTV)?

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Q. A device is sending out data at the rate of 1000 bps. How long does it take to send a file of 100,000 characters?

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Q. A file contains 2 million bytes. How long does it take to download this file using a 56-Kbps channel?

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Q. We need to send 265 kbps over a noiseless channel with a bandwidth of 20 kHz. How many signal levels do we need?

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Q. Calculate the theoretical highest bit rate of a regular telephone line. The signal-to-noise ratio is usually 3162.

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Q. Calculate the theoretical channel capacity. If SNR(dB) = 36 and the channel bandwidth is 2 MHz.

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Q. A channel has a 1-MHz bandwidth. The SNR for this channel is 63. What is the appropriate bit rate?

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Q. A channel has a 1-MHz bandwidth. The SNR for this channel is 63. What is the appropriate signel level?

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