We need to transmit 100 digitized voice channels using a pass-band channel of 20 KHz. What should be the ratio of bits/Hz if we use no guard band?
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- if you are given alow-pass channel that ends at 40MHz and you knew that the SNR for this channel is 255, then the maximum number of signal levels to be used over this particular channel equal?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?We have an available bandwidth of 400 kHz which spans from 500 to 900 kHz. What are the carrier frequency and the bit rate if we modulated our data by using ASK with d = 1?
- Ten signals, each requiring 3000 hz, are multiplexed onto a single channel using FDM. How much minimum bandwidth is required for the multiplexed channel? Assume that the guard bands are 300 Hz wide.We have a channel with a 1-MHz bandwidth. The SNR for this channel is 63. What are the appropriate bit rate and signal level?A digitized voice channel is made by digitizing a 4-kHz bandwidthanalog voice signal. We need to sample the signal at twice the highestfrequency. We assume that each sample requires 16 bits. What is therequired bit rate?
- we have10 channels that has 720 kpbs and we want to proliferate them in the time plane,every resource give 3 ASCII char in unit time,and there is 16 bit senkronization bits OUTPUT lines bit time(ms)?Eight 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 ?In a digital transmission, the receiver clock is 0.1 percent faster than the sender clock. How many extra bits per second does the receiver receive if the data rate is 2 kbps? How many if the data rate is 2 Mbps?
- Suppose, BanglaLink has 4 voice channels, each of 60Mbps. They use synchronous TDM to multiplex these channels. If 3 characters at a time are multiplexed (3 characters in each output slot), 1. Draw the first two output frames with arbitrary inputs. 2. What is the size of an output frame in bits? 3. What is the output frame rate? 4. What is the duration of an output frame?In an asynchronous 8 bit transmission using a UART (8051), the crystal in use is 22.1184 MHz. The required Baud rate is 19200. What is the minimum time to transmit a packet containing 124 bytes? Give the answer in ms.What is the main disadvantage of using FSK over ASK for digital communication? A. FSK is more prone to noise and interference. B. FSK is less power efficient. C. FSK requires more complex circuitry. D. FSK can only transmit data over a narrow range of frequencies.