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an audio signal has a bandwidth of 12 khz the maximum value of m t is 6 v this signal frequency modulates a carrier
an fm modulator is followed by an ideal band pass filter having a center frequency of 500 hz and a bandwidth of 70 hz
a sinusoidal message signal has a frequency of 150 hz this signal is the input to an fm modulator with an index of 10
a narrowband fm signal has a carrier frequency of 110 khz and a deviation ratio of 005 the modulation bandwidth is 10
given the following channel pulse-response samplesa find the tap coefficients for a three-tap zero forcing equalizerb
a show by a suitable sketch that the triangular spectrum of figure 48a satisfies nyquists pulse shaping criterionb find
the random variable x has a probability density function uniform in the range 0 le x le 2 and zero elsewhere the
compare the q-function and the approximation to it for large arguments given by 5202 by plotting both expressions on a
two gaussian random variables x and y are independent their respective means are 5 and 3 and their respective variances
two jointly gaussian random variables x and y have means of 1 and 2 and variances of 3 and 2 respectively their
two jointly gaussian zero-mean random variables x and y have respective variances of 3 and 4 and correlation
determine the cdf for a gaussian random variable of mean m and variance sigma2 express in terms of the q-function plot
a second-order butterworth filter has 3-db bandwidth of 500 hz determine the unit impulse response of the filter and
if five cards are drawn without replacement from an ordinary deck of cards what is the probability thata three kings
two events a and b have marginal probabilities p a 02 and p b 05 respectively their joint probability is p acapb 04a
derive an expression for the detection gain of a dsb system for the case in which the bandwidth of the band pass
an am system has a message signal that has a zero-mean gaussian amplitude distribution the peak value of m t is taken
assume that an am system operates with an indexof 06 and that the message signal is 12 cos 8pi compute the efficiency
an ssb system is to be operated with a normalized mean-square error of 005 or less by making a plot of output snr
the message signal on the input to an adc is a sinusoid of 25 v peak to peak compute the signal-to quantizing-noise
in discussing thermal noise at the beginning of this chapter we stated that at standard temperature 290 k the white
the preceding computer exercise problem examined the behavior of a pll in the acquisition mode we now consider the
in chapter 3 we developed a matlab program that can be used to investigate the acquisition performance of a pll using
assume a three-bit adc eight quantizing levels we desire to design a companding system consisting of both a compressor