A 20 Kbps satellite link has a propagation delay of 400 ms. The transmitter employs the "go back n ARQ" scheme with n set to 10. Assuming that each frame is 100 bytes long, what is the maximum data rate possible?
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A 20 Kbps satellite link has a propagation delay of 400 ms. The transmitter employs the "go back n ARQ" scheme with n set to 10. Assuming that each frame is 100 bytes long, what is the maximum data rate possible?
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- The Fig 4.1 shows a demultiplexer of a TDM. If the frame size is 16 bits long (no synchronous / frame bits), what is the bit stream in each output? The bits arrive at the demultiplexer as shown by the arrow. 000011101010101010000111011100000111100011 Fig: 4.1Consider a full-duplex 256 Kbps satellite link with a 240 millisecond end-to-end delay. The data frames carry a useful payload of size 12,000 bits. Assume that both ACK and data frames have 320 bits of header information, and that ACK frames carry no data. What is the effective data throughput When using Stop and Wait?For 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
- Four channels are multiplexed using synchronous TDM. The rate of each channel is given by 500 kbps and we use 2-bit units, provide a step-by-step calculation for the following: 1. Input bit duration 2. Input unit rate 3. Output frame rate 4. Output frame size4. Using a combination of ASK, FSK and PSK: b) Sketch the transmitted signal for the following bit stream: 10110011 01110100 11000001 c) What would be the data rate of this system if 20,000 signals were sent per second? d) What would be the effective bit time (not the signal time)? e) Could this be sent on a channel with a signal to noise ratio of 20 dB and bandwidth of 11,000 Hz?Suppose a 128-kbps point-to-point link is set up between the Earth and a rover on Mars. The distance from the Earth to Mars (when they are closest together) is approximately 55 Gm, and data travels over the link at the speed of light-3 × 108 m/s. (a) Calculate the minimum RTT for the link. X (b) Calculate the delay x bandwidth product for the link. (c) A camera on the rover takes pictures of its surroundings and sends these to Earth. How quickly after a picture is taken can it reach Mission Control on Earth? Assume that each image is 5 Mb in size.
- 5- A synchronous TDM with four 2 Mbps data stream inputs and one data stream output. The multiplexing unit of data is 1 bit. The input bit duration is the output bit duration is the output frame rate is ------- Frame/sec. otansmi Mbps; and us; the output bit rate is natos imeni adi stonl -.oi mibanaine 1. 1. ... 2 Mbps Be eill Frames ilsbit ... 0. 2 Mbps MUX 2 Mbps 1. 1. ... 2 Mbps .. 7- A de pulse train has a peak voltage value of 5 V, a frequency of 4 MHz, and a duty cycle of 30 percent. The minimum bandwidth necessary to pass this signal without excessive distortion is MHz. (Note: to =T*Duty Cycle; T= 1/F) 8- Ten channels, each with a 200 kHz bandwidth, are to be multiplexed together using FDM. The minimum bandwidth of the link is need for a guard band of 10 k Hz between the channels; while the minimum bandwidth of the link is 20 kHz between the channels. KHz when there is a KHz when there is a need for a guard band of 9. If a channel can transmit a range of frequencies from 10 MHz…Draw the waveform for the three-byte data sequence Ox93, 0x11, Ox41 being transmitted by UART at 9600 baud, MSB first, one stop bit, and even parity. Be sure to mark when each transition occurs. Find the SPBRG value (in both decimal and hex) 9600 for BRGH = 0, to set the baud rate and BRGH = 1. Assume that FOSC = 10 MHz.a. Compute for the data efficiency of transmitting if the data format is a General Synchronous Data Frame. b. For an asynchronous data transmission (wherein 1 byte of data is accompanied by a specific number of auxiliary bits), how many start and stop bits are there if the data efficiency in transmitting is ? The number of start bits is equal to the number of stop bits.