Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Paralell computing
Consider the following: the latency of an interconnect is 2 seconds, and the bandwidth is 64 bytes per second.
Calculate the time it takes to transmit a message of size 256 bytes ?
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- Q3.Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show me a complete solution NOT THE AI SOLUTION. Consider a digital multimedia transmission system. Separate audio and video coders are used to encode these signals. Audio and video bits are packed in packets together and transmitted over a transmission link. Each packet is 2,000 bytes long, which includes a 48-byte header. The system generates one packet every 40 ms. Calculate the following values:a. The minimum data transmission rate required to support the above system.b. The minimum signal-to-noise ratio (SNR) in dB required to transmit the above audio and video information. Assume a 400-kHz transmission channel bandwidth is used.c. The end-to-end packet delay over a 50-km link, using answer in Part a).arrow_forwardQ3// A given FM transmitter is modulated with sinusoidal input (in volt), m(t)= 25 cos800 t, and the modulation index is (5). The un-modulated carrier power is (150Watt) across 2002 resistive load. Determine: 1. The modulation constant, K₁. 2. The approximate bandwidth of FM signal. 3. The peak amplitude of the first order lower sideband. 4. The ratio of the average power in the sum of the second and fourth sidebands to power in all the remaining sidebands excluding carrierarrow_forwardGiven 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?arrow_forward
- Suppose a signal travels through a transmission medium and its power is reduced to one-half. What would be the attenuation (loss of power)?arrow_forwardConsider a channel with a 1 MHz capacity and an SNR of 63.a. What is the upper limit to the data rate that the channel can carry?b. The result of part (a) is the upper limit. However, as a practical matter, bettererror performance will be achieved at a lower data rate. Assume we choose a datarate of 2/3 as the maximum theoretical limit. How many signal levels are neededto achieve this data rate?arrow_forwardCounter Its auvel The Nyquist theorem for noiseless channel states that the capacity in bits per second of a channel is equal to the bandwidth multiplied by the logarithm (to the base 2) of the sum of the signal to noise power and 1. In mathematical statement: C= Bx log2(SNR 1)* True Falsearrow_forward
- The figure below illustrates an asynchronous transmission in the form of short blocks. Each data bit is of 9.06 ms duration, start bit duration is 0.04ms more than a data bit duration, and each stop bit duration is double the duration of a start bit . Determine the bit rate and baud rate of the transmission. Data Bits Stop Bits Start Bit 1 101 0 10 010 1 Line is quiet! Direction of Data Data: 0100 1010arrow_forwardAn analogue sensor has a bandwidth which extends from very low frequencies up to a maximum of 14.5 kHz. Using the Sampling Theorem (Section 3.3.1), what is the minimum sampling rate (number of samples per second) required to convert the sensor signal into a digital representation? If each sample is now quantised into 2048 levels, what will be the resulting transmitted bitrate in kbps? Give your answer in scientific notation to 1 decimal place. Hint: you firstly need to determine the number of bits per sample that produces 2048 quantisation levels (see Sections 2.4 (Block 1) and 3.3.2 (Block 3)).arrow_forwardUsing Shannon’s noisy theorem, what bandwidth is necessary to support a 1 Gbps, assuming a signal-to-noise ratio of 40 decibels? Suppose you want to achieve a bit rate of 15 Gbps using a maximum bandwidth of 900 MHz. What is the minimum allowable signal-to-noise ratio in decibels?arrow_forward
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