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Determine an upper (union) bound on the probability of a bit error based on the minimum distance of the concatenated code.
Determine the performance of this class of codes for DS spread spectrum signals with binary PSK modulation and either soft-decision or hard-decision decoding.
A rate ½ convolutional code with d free = 10 is used to encode a data sequence occurring at a rate of 1000 bits/s.
Determine the minimum chip rate to obtain a bit error probability of 10-5. Additive noise at the receiver may be ignored in this computation.
Determine the number of users if each user has equal power and the desired level of performance is an error probability of 10-6.
If the jammer is a pulse jammer, determine the pulse duty cycle that results in worstcase jamming and the corresponding probability of error.
What is the interference margin against a continuous-tone interference if the desired error probability is 10-5?
Determine the period of the sequence obtained by forming the modulo-2 sum of {c1i} and {c2i}.
Determine the interference margin if the required Eb/J0 = 10 and the jammer is a tone jammer with an average power Jav.
What is the processing gain? What is the probability of error in the presence of AWGN?
An FH binary orthogonal FSK system employs an m = 15 stage linear feedback shift register that generates a maximum-length sequence.
Compare the result in (a) with the error probability of an FH spread spectrum system that hops once per bit.
If the jammer operates as a partial-band jammer, what is the bandwidth occupancy for worst-case jamming?
The interference on the channel is AWGN. The FSK demodulator outputs are square-law-detected and passed to the decoder, which performs optimum soft-decision.
Determine the error probability for an FH spread spectrum signal in which a binary convolutional code is used in combination with binary FSK.
Determine the condition for the convergence of the mean value of CN (n).
Determine the range of values of ? that provides an over damped system for the adjustment process.
Determine the optimum coefficients of the adaptive transversal (FIR) filter B(z) = b0 + b1z-1 that minimize the mean square error.
Assess the cost of the cyclic prefix (used in multicarrier modulation to avoid ISI) in terms .
What is the relationship between X(0) and X'(0)? If we plot |X(k)| and |X'(k)| on the same graph, explain the relationships between the two graphs.
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 .