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Plot the probability of error for s21 = 1, s22 = 3, and either k = 1 or k is the optimum value found in a.
Sketch the trellis for the maximum-likelihood sequence detector and label the states.
Determine the average probability of error, assuming that the two signals are equally probable and the additive noise is white and Gaussian.
Determine the tap coefficients of a three-tap linear equalizer based on the zero-forcing criterion.
Determine the tap coefficients of a three-tap linear equalizer that equalizes the channel (received signal) response to an equivalent partial-response .
Determine the residual ISI at the output of the equalizer for the optimum tap coefficients.
Determine the output of the demodulator at t = T and t = 2T that employs a filter matched to s(t).
Determine qm for m = ±2, ±3, by convolving the impulse response of the equalizer with the channel response.
Determine the possible output levels at the detector, assuming that successive transitions can occur at the rate 1/Tb.
The received sequence {yn} is processed by a linear three-tap equalizer that is optimized on the basis of the MSE criterion.
Evaluate and compare the exact values of the output SNR for the three-tap and infinitetap DFE in the special cases where N0 = 0.1 .
This pulse is used for transmitting digital information over a band-limited channel at a rate 1/T symbols/s.
How many surviving sequences are there in the Viterbi algorithm for this channel?
The Nyquist criterion gives the necessary and sufficient condition for the spectrum X( f ) of the pulse x(t) that yields zero ISI.
Select a symbol rate and a power efficient constellation size to achieve 9600 bits/s signal transmission.
Design an M-ary PAM system that transmits digital information over an ideal channel with bandwidth W = 2400 Hz.
Consider the transmission of data via PAM over a voice-band telephone channel that has a bandwidth of 3000 Hz.
A precoder for a partial response signal fails to work if the desired partial response at n = 0 is zero modulo M.
The binary sequence 10010110010 is the input to a precoder whose output is used to modulate a duobinary transmitting filter.
Determine and sketch the envelope (group) delay of the filter as a function of frequency.
Determine the frequency-response characteristic of the transmitting and receiving filters that yield zero ISI at a rate of 1/T symbols/s.
Determine the (magnitude) frequency-response characteristic of the optimum transmitting and receiving filters.
The ISI term is a random variable that takes the values -1 2 , 0, and ½ with probabilities ¼ , ½ , and ¼ , respectively.
If the signal pulse used is rectangular, determine the loss in SNR due to the mistiming.
Determine the output of the matched filter at t = kT , k = 0, ±1, ±2, ... , where T is the symbol duration.