(2) In asynchronous transmission, why do we keep the number of data bits between the start bit and stop element in a range of 5 to 8 in general? (3) Which steps in PCM lose information in general so that the analog data cannot be fully recovered?
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(2) In asynchronous transmission, why do we keep the number of data bits between the start bit and stop element in a range of 5 to 8 in general?
(3) Which steps in PCM lose information in general so that the analog data cannot be fully recovered?
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- We need to use synchronous TDM and combine 20 digital sources, each of 100 Kbps. Each output slot carries 1 bit from each digital source, but one extra bit is added to each frame for synchronization. Answer the following questions: a. What is the size of an output frame in bits? b. What is the output frame rate?c. What is the duration of an output frame? d. What is the output data rate? e. What is the efficiency of the system (ratio of useful bits to the total bits)?A data of 700 kbps is to be transmitted over a channel of 5 kHz bandwidth and 200 kbps capacity. The transmission should be free from the ISI problem. What should be the QAM feature to modulate this data over noiseless channel?Explain the encoding process of CDMA and generate a combined signal by considering thefollowing parameters.Number of stations: 06Data bit for station 1 is 1 Data bit for station 2 is 0Data bit for station 3 is 0 Data bit for station 4 is 1Data bit for station 5 is silent Data bit for station 6 is 1Use Walsh table to generate the chip sequence for the six stations.
- Make three problems regarding calculations of bit rate, baud or M-ary encoding.Question 29: Consider a system with four low-bit-rate sources of 20 kbit/sec, 30 kbit/sec, 40 kbit/sec, and 60 kbit/sec. Determine the slot assignments when the data streams are combined using TDM.Assume that the data is transferred using 16PAM (16-level pulse amplitude modulation).How many bits are transferred per pulse?What is the pulse rate? What is the requiredbaseband bandwidth in Hertz according to Nyquist?Show all calculations
- Beginning with one start bit followed by 21 data bits, 2 parity bits and 1 stop bit: a) What are the total number of bits in the frame? b) What would the overhead and throughput be (answer in percent)?Error and flow control are issues for synchronous time-division multiplexing, but why and how?What is TLB and Hit-Ratio?
- 2. How many characters per second can be transmitted over a 9600-baud line in each of the following modes? (Assume a character code of eight bits.) a. Synchronous serial transmission. Also draw timing diagram. b. Asynchronous serial transmission with two stop bits. Draw timing diagram. c. Asynchronous serial transmission with one stop bit. Draw timing diagram.In _______ encoding, the duration of the bit is divided into two halves. The voltage remains at one level during the first half and moves to the other level in the second half. The transition at the middle of the bit provides synchronization. a. Manchester b. differential Manchester c. both (a) and (b) d. neither (a) nor (b)Q. 2. (b) We need to use Time Division Multiplexing and combine 5 digital sources, each of 800 Kbps. Each output slot carries 4 bits from each digital source, but no extra bit is added to each frame for synchronization. Now, answer the following questions: i) What is the output frame duration? ii) What is the output frame rate? iii) What is the output bit rate? iv) What is the output bit duration? v) What is the size of an output frame in bits? vi) What is the input bit duration?