A convolutional encoder has a single-shift register with two sta

A convolutional encoder has a single-shift register with two sta A convolutional encoder has a single-shift register with two stages, (i.e., constraint length K = 3), three modulo-2 adders, and an output multiplexer. The generator sequences of the encoder are as follows: g(1) = (1, 0, 1) g(2) = (1, 1, 0) g(3) = (1, […]

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Suppose that in the receiver of the quadrature-carrier

Suppose that in the receiver of the quadrature-carrier Suppose that in the receiver of the quadrature-carrier multiplex system of Figure b, the local carrier available for demodulation has a phase error F with respect to the carrier source used in the transmitter and receiver, show that this phase error will cause cross-talk to arise between […]

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Suppose that in a baseband M-ary PAM system with M

Suppose that in a baseband M-ary PAM system with M Suppose that in a baseband M-ary PAM system with M equally likely amplitude levels, as described in Problem 4.27, the average probability of symbol error Pe is less than 10-6 so as to make the occurrence of decoding errors negligible. Show that the minimum value […]

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Show that the truth table given in Table 7.3 can

Show that the truth table given in Table 7.3 can Show that the truth table given in Table 7.3 can be constructed by combining the following two steps: (a) The message signal b(t) and PN signal c(t) are added modulo-2. (b) Symbols 0 and 1 at the modulo-2 adder output are represented by phase shifts […]

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Suppose a random binary data stream (with equiprobable symbols

Suppose a random binary data stream (with equiprobable symbols Suppose a random binary data stream (with equiprobable symbols) is differentially encoded and then transmitted using one of the five line codes described in Problem 3.11. How is the power spectral density of the transmitted data affected by the use of differential encoding? Justify your answer. […]

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Suppose a communication receiver consists of two components, a d

Suppose a communication receiver consists of two components, a d Suppose a communication receiver consists of two components, a demodulator and a decoder. The demodulator is based on a Markov model of the combined modulator and channel, and the decoder is based on a Markov model of a forward error correction code. Discuss how the […]

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A computer executes four instructions that are designated by the

A computer executes four instructions that are designated by the A computer executes four instructions that are designated by the code words (00, 01, 10, 11). Assuming that the instructions are used independently with probabilities (1/2, 1/8, 1/8, 1/4), calculate the percentage by which the number of bits used for the instructions may be reduced […]

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