2. Ansou signal i1 sampled with 600 samplehm rate. What look lke d be the be-y...
2. An analog signal x(t) = sin(480πt) + 3 sin(720πt) is sampled 600 times per second. (a) Determine the Nyquist sampling rate for x(t). (b) What are the frequencies (in radians) in the resulting discrete time signal xs[n]? (c) If xs[n] is passed through an ideal reconstructor, what is the reconstructed signal y(t)?
Question 2 A bandlimited signal is sampled at the Nyquist rate (fs). The signal can be recovered by passing the samples through: a. a low-pass filter with cut-off frequency O b. an envelope detector c. a PLL Od. a high-pass filter with cut-off frequency
2. a) A signal, g(t)-sinc(20nt), is uniformly sampled at a rate of (i) 15 Hz, (ii) 25 Hz. For each of these cases, sketch the spectrum of the sampled signal. b) Consider an analog signal,
Question 2 An analog signal with a power Pm-GW, and a bandwidth of 4kHz is sampled at a rate f, = 10ksamples/sec. (a) What value of A will lead to an SQNR of 55dB if uniform quantization is used? (b) If the peak voltage of m(t) is 8V, what value of L satisfies (a)? (c) How many bits per sample should be used? (d) What is the bit rate if we use the number of bits per sample from (c)?...
Consider an analog signal x(t) = 2 cos(2π600t). The signal is sampled at a rate 3000 samples per second and 20 samples are saved to memory. Sketch the magnitude of the length 20 DFT of the sampled data. For credit, clearly label axes, and exactly sketch the magnitudes (if you connect points in a line drawing, rather than a “stem” plot, then clearly mark the points themselves).
A low-pass signal with a bandwidth of 250 KHz was sampled at the Nyquist rate using 512 levels of quantization to generate a PCM signal. a) Calculate the bit rate of the digitized signal b) Calculate the quantization error as SNR(db) c) What is the bandwidth of the PCM signal if it was sent using NRZ line coding?
3. The signal continuous time signal re(t)-cos(200t)2cos cos(100t) is sampled at twice the Nyquist rate to get the sequence r[n]. (a) Sketch X(e) (b) If y[n] = [4n]. Sketch Y(e'"). (c) Is there any aliasing in the Fourier spectrum of yin]? Why or Why Not? (d) If z [n] = x-1, ketch the DTFT of z[n] (e) Is there any aliasing in the Fourier spectrum of [n]? Why or Why Not?
3. The signal continuous time signal re(t)-cos(200t)2cos cos(100t) is...
36. Sampling a low-pass signal. A signal x(t) = sin( 1,000.71) is sampled at the rate of F, and sent through a unity-gain ideal low-pass filter with the cutoff frequency at F,/2. Find and plot the Fourier transform of the reconstructed signal z(t) at filter's output if a. F=20 kHz b. Fs =800 Hz
In a single-integration DM system, the voice signal is sampled at a rate of 64 kHz, similar to PCM. The maximum signal amplitude is normalized as Amax1 (a) Determine the minimum value of the step size ? to avoid slope overload (b) Determine the granular noise power No if the voice signal bandwidth is 3.4 kHz. (c) Assuming that the voice signal is sinusoidal, determine So and the SNR. (d) Assuming that the voice signal amplitude is uniformly distributed in...
(d) A signal is sampled at intervals of 0.01 s for a total of 8 s. You arrange so the discrete Fourier transform covers the full range of frequencies between -F and F, What is F? What is the spacing between frequencies?