000. the signal to noise ratio is usually 2165. calculate maximum capacity of the noisy channel and give suggestions in how to send data faster than thi
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- What is the bandwidth of a signal that ranges from 2 MHz to 7MHZ? * 14 MHz 9 MHz 4 MHz 5 MHz Consider a noiseless channel with a bandwidth of 4kHz. If we want to transmit 32Kbps on this channel, the minimum number of signal levels needed is: * 8 О 16 32 64 describes the position of the waveform relative to time 0. * frequency amplitude phase voltageThe Amplitude Modulation (AM) is a technique used in communication for transmitting information via radio carrier wave. AM works by varying the amplitude of the transmitted signal in relation to the information being sent. The equations of the carrier signal, the original signal to send, and the modulated signal combining the two signals are respectively: VI-V sin (2nfet) V2=Vm sin (2πfmt) V3-V sin (2nfet)+V sin (2nft)* sin (2nft) Supposing that V-Vm-1, fc-20, fm 1. Write a MATLAB program that plots the three signals with single call, the graphs must be contain (desired title, axis labels, annotations, with symbols for color, style, and marker) for each graph. Use the step 0.0025 for the time.The Amplitude Modulation (AM) is a technique used in communication for transmitting information via radio carrier wave. AM works by varying the amplitude of the transmitted signal in relation to the information being sent. The equations of the carrier signal, the original signal to send, and the modulated signal combining the two signals are respectively: VI-V sin (2πƒct) V2=Vm sin (2πfmt) V3=Vcsin (2πfct)+ Vm sin (2πfmt)* sin (2nfct) C Supposing that Vc =Vm=1, fc-20, fm=1. Write a MATLAB program that plots the three signals with single call, the graphs must be contain (desired title, axis labels, annotations, with symbols for color, style, and marker) for each graph. Use the step 0.0025 for the time.
- 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 a complete solution for each problem4. A digital audio broadcast service is used to transmit digital music. Stereo audio signals are to be transmitted using a digital modem over a data link. A stereo signal uses two channels. In each channel, an audio signal is sampled at a rate of 44 kilo samples/second and quantised using a 24-bit quantiser. The data link has a transmission bandwidth of 0.5 MHz. Assume a 46-byte overhead is added to each packet before transmission.a. What is the total bit rate produced by a stereo audio signal?b. What is the minimum SNR value (in dB) required for the above data link?c. Assume that the broadcast service uses the UDP/IP/Ethernet protocol to transmit digital audio, using a packet switched network. The maximum packet size is limited to 800 bytes, which includes…Fill in the blanks: The North American Analog Cellular Radio System uses FM with channels 30kHz wide. Suppose such a channel were used for digital communication. If the available signal to noise ratio is 20 dB, calculate the maximum theoretical bit rate and the corresponding baud rate using (a) a two level code and (b) a four level code. (a) and andData communication systems. The solution time of the problem is 10 minutes. In an FDMA-based multiple access system, each user is assigned an 80 kHz channel for full-duplex communication. There are 1000 channels in total in the system.Depending on the information given above, if the initial frequency of the frequency spectrum used by the FMDA system in one direction is 1000 Mhz, the carrier frequency of the channel belonging to the first user is 1.000.040 KHz.A) False B) True
- Q3// 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 carrierA simple telephone system consists of two end offices and a single toll office to which each end office is connected by a 1-MHz full-duplex trunk. The average telephone is used to make four calls per 8-hour workday. The mean call duration is 6 min. Ten percent of the calls are long-distance (i.e., pass through the toll office). What is the maximum number of telephones an end office can support? (Assume 4 kHz per circuit.)The Hi-Fi modem company has designed a new frequency modulation that can transmit 38400 bits/sec. The baud rate is 4800. How many frequency levels can each interval have? 3. 4. Given a location with 7 bits what is the minimum and maximum value that it can hold A) As an unsigned location B) As a signed location
- In a typical mobile phone system with hexagonal cells, it is forbidden to reuse a frequency band in an adjacent cell. If 840 frequencies are available, how many can be used in a given cell?For SNR of 12.33 dB and signal power .4 of 22.23 mW, the value of noise power :is 1.3 mW O 0.3 W O 0.016 mW O 0.075 mW OA computer user finds that his wireless router transmits data at a rate of 75 Mbps (megabits per second). Compare the average time to transmit one bit of data with the time difference between the wifi signal reaching an observer's cell phone directly and by bouncing back to the observer from a wall 8.00 m past the observer.