Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
Channel C1 is an additive white Gaussian noise channel with a bandwidth W, average transmitter power P, and noise power spectral density ½N0.
On the same axis, plot the capacity of the same channel when binary orthogonal signaling is employed.
Compare the average codeword length with the entropy of the source.
Design Huffman codes for each source. Which Huffman code is more efficient?
A DMS has an alphabet of eight letters xi, i = 1, 2,..., 8, with probabilities 0.25, 0.20, 0.15, 0.12, 0.10, 0.08, 0.05, and 0.05..
Assume that we have a binary symmetric channel with crossover probability e = 0.3. Is it possible to transmit the source reliably over the channel?
An additive white Gaussian noise channel has the output Y = X + N, where X is the channel input and N is the noise with probability density function.
What is the minimum channel capacity required to transmit this source reliably? Can this source be reliably transmitted via a binary symmetric channel?
What is the capacity of the cascade channel AB?
If it is further assumed that, on the same channel, a BPSK scheme is employed with hard decision decoding, what will be the minimum required channel .
Determine the entropy H(Y ) and comment on what effect the transformation has had on the entropy of X.
Use the Huffman encoding procedure to determine a binary code for the source output.
If the transmission rate from the source to the destination is zero, what is the minimum achievable distortion?
Determine the system function G(s) and express the time constants t1 and t2 in terms of the circuit parameters.
What should be the bandwidth of a Doppler frequency tracking loop if the loop is designed to track Doppler frequency shifts for vehicles traveling at speeds.
Determine the signal and noise components at the input to a fourth-power (M = 4) PLL that is used to generate the carrier phase for demodulation of QPSK.
Now assume the system is binary and employs on-off signaling (i.e., s1(t) = s(t) and s2(t) = 0).
The received signal consists of a direct component, a scattered component, and the additive white Gaussian noise.
Let Zn + ( ½ , ½ ,..., ½ ) denote the n-dimensional integer lattice shifted by ½, and let R be an n-dimensional hypercube centered at the origin with side .
Determine the optimal error probability for this system, using a coherent detector.
Evaluate the performance of the four-phase demodulator for AWGN if no account is taken of the memory in the modulation.
Determine the probability of error for each repeater and the required eb/N0 to achieve this performance in AWGN.
The transmitting and receiving antennas are parabolic dishes with diameter D = 3 m.
The transmitting and receiving antennas are parabolic, each having a diameter of 1 m.
Determine the received power level at the output of the receiver antenna.