What is the length of a bit in a channel with a propagation speed of 2 x 108 m/s if the channel bandwidth is 1 Mbps? 10 Mbps? 100 Mbps?
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What is the length of a bit in a channel with a propagation speed of 2 x 108 m/s if the channel bandwidth is
- 1 Mbps?
- 10 Mbps?
- 100 Mbps?
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- Consider a communication channel with bandwidth B = 8000 Hz. Suppose the channel has a signal-to-noise ratio S/N = 541. What is the maximum data rate of this channel? ? What is the minimum number of signal levels needed to achieve a data rate of 64000 bps?A line has a signal-to-noise ratio of 1000 and a bandwidth of 4000 kHz. What is the maximum data rate supported by this line? If the bandwidth of the channel is 5 kbps, how long does it take to send a frame of 100,000 bits out of this device? What is the maximum data rate of a channel with a bandwidth of 200 kHz if we use four levels of digital signaling?Suppose, you have 6 voice channels, each of 60MBPS. You have to use synchronous TDM to multiplex these channels. If 2 characters at a time are multiplexed (2 characters in each output slot), answer the following: What is the size of an output frame in bits? What is the output frame rate? What is the duration of an output frame? What is the output data rate? Input bit duration? Output bit duration? Output slot duration?
- Suppose there is a b+n (Sum of first and last digit of your Reg#) Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume a propagation speed of 2.4*108 meters/sec. 1. What is the propagation delay of the link? 2. What is the bandwidth-delay product?Suppose that we are sending a 30 Mb MP3 file from a source host to a destination host. All links in the path between source and destination have a transmission rate of 10 Mbps. Assume that the propagation speed is 2 × 108 meters/sec, and the distance between source and destination is 10,000 km. 1. Now suppose there is only one link between source and destination, and there are 10 FDM channels in the link. The MP3 file is sent over one of the channels. What is the end-to-end delay?Given a channel with an intended capacity of 20 Mbps, the bandwidth of the channel is 3 MHz. what signal-to-noise ratio is required to achieve this capacity?
- For data is transmitted over twisted-pair cable, you have these characteristics: A signal's power on the channel is 60 dB, signal attenuation is 2 dB per 100 meters, and average noise power on the cable is 0.15 dB per meter. Answer the following questions: What's the S/N ratio at the end of a 60-meter channel? What's the S/N ratio at the end of a 1.5-kilometer channel? What's the maximum channel length if the receiving device requires at least 25 dB of S/N ratio for reliable operation?88. Suppose transmission rate of a channel is 32 kbps. If there are ‘8’ routes from source to destination and each packet p contains 8000 bits. Total end to end delay in sending packet P is ................ a. 2 sec b. 3 sec c. 4 sec d. 1 secCalculate the minimum timeout value for a stop-and-wait algorithm running over a 50-meter point-to-point copper link. Assume a minimum delay of 5 µs at the receiver. If you know the distance between two points, you can calculate the speed-of-light latency, although you have to be careful because light travels across different media at different speeds: It travels at 3.0 × 108 m/s in a vacuum, 2.3 × 108 m/s in a copper cable, and 2.0 × 108 m/s in an optical fiber.
- A corporation has a medium with a 7 MHz bandwidth (lowpass). The corporation needs to create 9 separate independent channels each capable of sending at least 12 Mbps. The company has decided to use QAM technology. What is the minimum number of bits per baud for each channel? What is the number of points in the constellation diagram for each channel? Let d = 0231. 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? a. 64 kbps b. 32 kbps c. 128 kbps d. 16 kbpsFor the following stream of digital signal which is being transmitted by bit rate 5 Kbps: 101100000000110 a) Draw the waveform for all line codes you studied. b) Determine if the line code is self synchronized or not. c) Determine if the code can be used with ac coupling or not d) Determine the Bandwidth of the line code e) Which code is used in magnetic recording f) Which code is used in LAN