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Consider a baseband binary PAM system that is designed Consider a baseband binary PAM system that is designed to have a raised-cosine spectrum P (A?). The resulting pulse p (t) is defined in Equation (4.62). How would this pulse be modified if the system was designed to have a linear phase response? Is this the […]

Consider a sine wave of frequency A?m and amplitude Am which is Consider a sine wave of frequency A?m and amplitude Am which is applied to a delta modulator of step sue A. Show that slope-overload distortion will occur if Am > ?/2p A?m Ts where Ts is the sampling period. What is the maximum […]

Both wireless communications and satellite communications rely o Both wireless communications and satellite communications rely on radio propagation for their operations. Summarize (a) The similarities of these two multiuser communication systems, and (b) The major differences that distinguish them from each other.   Is this the question you were looking for? If so, place your […]

As explained in the Introduction to this chapter, channel coding As explained in the Introduction to this chapter, channel coding can be used to reduce the Eb/N0 required for a prescribed error performance or reduce the size of the receiving antenna for a prescribed Eb/N0. In this problem we explore these two practical benefits of […]

An unmodulated carrier of amplitude Ac and frequency A?c and An unmodulated carrier of amplitude Ac and frequency A?c and band-limited white noise are summed and then passed through an ideal envelope detector. Assume the noise spectral density to be of height N0/2 and bandwidth 2W, centered about the carrier frequency A?c. Determine the output […]

An orthogonal set of signals is characterized by the property An orthogonal set of signals is characterized by the property that the inner product any pair of signals in the set is zero. Figure shows a pair of signals s1 (t) and s2 (t) that satisfy this condition. Construct the signal constellation for s1 (t) […]

An interesting property of π/4-shifted DQPSK signals is tha An interesting property of π/4-shifted DQPSK signals is that they can be demodulated using an FM discriminator. Demonstrate the validity of this property. Is this the question you were looking for? If so, place your order here to get started!

An FSK system transmits binary data at the rate An FSK system transmits binary data at the rate of 2.5 x 106 bits per second. During the course of transmission, white Gaussian noise of zero mean and power spectral density 10-20 W/Hz is added to the signal. In the absence of noise, the amplitude of […]

An FDM system uses single-sideband modulation to combine 12 An FDM system uses single-sideband modulation to combine 12 independent voice signals and then uses frequency modulation to transmit the composite band 0.3 to 3.4 kHz; the system allocates it a bandwidth of 4 kHz. For each voice signal, only the lower sideband is transmitted. The […]

Consider a chain of (n — 1) regenerative repeaters, with Consider a chain of (n — 1) regenerative repeaters, with a total of n sequential decisions made on a binary PCM wave, including the final decision made at the receiver. Assume that any binary symbol transmitted through the system has an independent probability p1 of […]