2. Ansou signal i1 sampled with 600 samplehm rate. What look lke d be the be-y...
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).
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?
1. Identify the first five spectral images (frequency contents) of a 200 Hz signal sampled at 600 Hz. 2. An analog signal has a range of 15 V. If the quantization step must be no greater than 0.01V, how many bits must be used for A/D conversion? answer is 11 bits but explain
1. (a) A signal band-limited to 10 kt is sampled at Nyquist rate and i-law quantized with ? 127. if this digital signal is to be transmitted with an SNR of at least 30 dB, determine the number of bits in the quantizer output. (b) What is the actual SNR observed at the quantizer output in part (a)7 (e) Determine the transmission bandwidth of the digital signal above.