Can an information signal have a higher frequency than that of the carrier signal? What would happen if a 1-kHz signal amplitude-modulated a 1-kHz carrier signal
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Can an information signal have a higher frequency than that of the carrier signal? What would happen if a 1-kHz signal amplitude-modulated a 1-kHz carrier signal?
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- What is the propagation delay on a circuit using a LEO satellite orbiting 500 miles above the earth if the speed of the signal is 186,000 miles per second? If the satellite is 22,000 miles above the earth?What is the maximum bandwidth of an FM signal with a deviation of 27 kHz and a maximum modulating signal of 4 kHz as determined by Carson's rule?For the bit sequence 10000101111 draw the waveform for i. ii. Manchester Encoding Differential Manchester encoding
- We use modulation in communication system for many reason, one of the reason for using it in AM is: A. The message signal can transmitted faster with modulation compared to the same signal without modulation. B. To attach interference to the modulated signal in order to transmit it through the medium C. The modulator enhance the noise in the modulated signal using a band pass filter D. The modulator allows controlling the phase of the carrier signal, thus controlling the carrier phase. E. To control the demodulator on the receiver and extract a message signal F. To obtain a active transmitting and receiving of the modulated signal through the antennaThe transmission impairment that refers to a signal with high energy in a very short time is Impulse Noise why?For an FM modulator with a modulation index of m = 1, and the given parameters as below. Va(t) = 2 sin (2n200t) and Vü(t) = 10 sin (2r1000t) (iii) Compute the signal amplitudes.
- Is it true that using block coding in addition to line coding systems overcomes the problem of signal transmission errors?For an FM modulator with a modulation index of m= 1, and the given parameters as below. Va(t) = 2 sin (2x200t) and Vú(t) = 10 sin (2n1000t) (iv) Draw the frequency spectrum showing their relative amplitudes.In a CRC voice recognition system, the generator is polynomial g = 11011 and if we want to send the data K = 01111110, what data is sent (the right bit is the least valuable and the left bit is the most valuable bit)
- One way to electrically or optically represent a binary 1 or 0 is to use current state modulation, which represents a binary 1 with the presence of voltage (on a copper cable) or the presence of light (on a fiber-optic cable). Similarly, the absence of light or voltage represents a binary 0.An analog signal carries 8 bits per signal element. If 6000 signal elements are sent per second, find the bit rate.For the bit stream 101101010, describe and sketch the waveforms for each of the codes below: (i) NRZ-L (ii) NRZ-I (iii) Manchester (iv) Differential Manchester (v) Bipolar RZ Assume that the signal level for the preceding bit for NRZ-I was high.