Advanced Electronic Communications Systems 6th. Edition by Wayne Tomasi | 9781292027357 | 1292027355 | Holooly

Electronic, Digital Communication

Advanced Electronic Communications Systems

63 SOLVED PROBLEMS

Question: 6.6

Determine the 12-bit linear code, the eight-bit compressed code, the decoded 12-bit code, the quantization error, and the compression error for a resolution of 0.01 V and analog sample voltages of (a) +0.053 V, (b) −0.318 V, and (c) +10.234 V ...

Verified Answer:

a. To determine the 12-bit linear code, simply div...

Question: 4.6

For the following sequence of bits, identify the ASCII-encoded character, the start and stop bits, and the parity bits (assume even parity and two stop bits): ...

Verified Answer:

\qquad \qquad \qquad \qquad \qquad \qquad \...

Question: 4.7

For the following string of ASCII-encoded characters, identify each character (assume odd parity): ...

Verified Answer:

\qquad \qquad \qquad \qquad \qquad \qquad \...

Question: 4.5

For a 12-bit data string of 101100010010, determine the number of Hamming bits required, arbitrarily place the Hamming bits into the data string, determine the logic condition of each Hamming bit, assume an arbitrary single-bit transmission error, and prove that the Hamming code will successfully ...

Verified Answer:

Substituting m = 12 into Equation 2, the number of...

Question: 4.4

Determine the BCS for the following data and CRC generating polynomials: Data G(x) = x^7 + x^5 + x^4 + x² + x¹ + x^0 = 10110111 CRC P(x) = x^5 + x^4 + x¹ + x^0 = 110011 ...

Verified Answer:

First, G(x) is multiplied by the number of bits in...

Question: 14.8

Complete the link budget for a satellite system with the following parameters. Uplink 1. Earth station transmitter output power at saturation, 2000 W 33 dBW 2. Earth station back-off loss 3 dB 3. Earth station branching and feeder losses 4 dB 4. Earth station transmit antenna gain (from Figure 27, ...

Verified Answer:

Uplink budget: Expressed as a log, EIRP (earth sta...

Question: 14.7

A coherent 8-PSK transmitter operates at a bit rate of 90 Mbps. For a probability of error of 10^-5, a. Determine the minimum theoretical C/N and Eb/N0 ratios for a receiver bandwidth equal to the minimum double-sided Nyquist bandwidth. b. Determine the C/N if the noise is measured at a point prior ...

Verified Answer:

a. 8-PSK has a bandwidth efficiency of 3 bps/Hz a...

Question: 14.6

A coherent binary phase-shift-keyed (BPSK) transmitter operates at a bit rate of 20 Mbps. For a probability of error P(e) of 10^-4, a. Determine the minimum theoretical C/N and Eb/N0 ratios for a receiver bandwidth equal to the minimum double-sided Nyquist bandwidth. b. Determine the C/N if the ...

Verified Answer:

a. With BPSK, the minimum bandwidth is equal to t...

Question: 14.2

For a total transmit power (Pt) of 1000 W, determine the energy per bit (Eb) for a transmission rate of 50 Mbps. ...

Verified Answer:

T_{b}=\frac{1}{f_{b}}=\frac{1}{50\,×\,10^{6...

Question: 6.5

For a compressor with a μ = 255, determine a. The voltage gain for the following relative values of Vin: Vmax, 0.75 Vmax, 0.5 Vmax, and 0.25 Vmax. b. The compressed output voltage for a maximum input voltage of 4 V. c. Input and output dynamic ranges and compression. ...

Verified Answer:

a. Substituting into Equation 10, the following v...

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