Given a transmission rate of 1 Gbps and a propagation speed of 200m / μ sec , how many meters of cable are needed for a full duplex transmission link to have a minimum capacity of 1500 bytes?
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Given a transmission rate of 1 Gbps and a propagation speed of 200m / μ sec , how many meters of cable are needed for a full duplex transmission link to have a minimum capacity of 1500 bytes?
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- Consider an OFDM system in which 1000 subcarriers are each to be modulated at 1000 bits per second. Assume that each subcarrier is to be modulated using QPSK. (a) What is the symbol transmission rate? (b) How close can the subcarriers be spaced and still be orthogonal? (c) Assume that at least one subcarrier always carries QPSK symbols. What is the lowest data rate that can be supported by this scheme?We would like to transmit information over a CAT-6 twisted pair cable with a bandwidth of 250 MHz. Calculate the channel capacity (in bps) knowing that the signal to noise ratio SNR is 12 dB (in decibel).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?
- 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?2. A path in a digital circuit-switched network has a data rate of 1 Mbps. The exchange of 1000 bits is required for the setup and teardown phases. The distance between two parties is 5000 km. Answer the following questions if the propagation speed is 2 X 10° m: a. What is the total delay if 1000 bits of data are exchanged during the data transfer phase? b. What is the total delay if 100,000 bits of data are exchanged during the data transfer phase? c. What is the total delay if 1,000,000 bits of data are exchanged during the data transfer phase? d. Find the delay per 1000 bits of data for each of the above cases and compare them. What can you infer?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?
- In ADSL, the OFDM symbol rate across all subcarriers is 4000 symbols per second. Assume that in the downstream direction, 25 subcarriers use 1024-QAM, 50 use 256-QAM, 100 use 64-QAM and 100 use 16-QAM. What is the overall bit rateEight channels, each with a 4 KHz bandwidth are to be multiplexed together. What is the minimum bandwidth of the link if there is need for a guard band of 500 Hz between the channels to prevent interference ?Data communication Suppose that the spectrum of a channel is between 8 MHz and 10 MHz, and the intended capacity is 8 Mbps. 1= With multiple signaling level, how many levels are required to obtain this capacity and how many bits can be transferred with each signal element? Constant values= c=3x^10°m/s, k=1,38x^10231/K
- Assume that, in a Stop-and-Wait system, the length of the line is 10 Km, the volume of the pipe is 5Kbytes, and 1 bit takes 40 milliseconds to make a round trip. What is the bandwidth of the line?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?Computer Science Calculate the length of cable through which a signal can be sent before its powerdecreases to half the original value. Do this for each of the media types aboveassuming that the attenuation in twisted pair cables is 6 dB/km, in coaxial cableis 1.5 dB/km and in optical fiber is 0.3 dB/km. Please show every step briefly.