Essay About Fourier Transform Property And Time T

Signals, Spectra, and Signal Processing
Topic: Signals, Spectra, and Signal Processing1.Which characteristic of a signal provides a measure of the extent of significant spectral content of the signal for positive frequencies?Ans: bandwidth2. A ______ is a frequency-selective device that is used to limit the spectrum of a signal to some specified band of frequenciesAns: filter3. Which is not a method of data compression?Ans: Winzip4. All of these are IIR Filter design techniques exceptAns: Frequency sampling5. A ______ is a function that is defined for all time t contained in some interval on the real lineAns: continuous-time (CT) signal6. Convolution relates three signals: the input signal, the output signal, and the ______.Ans: impulse response7. What are the FIR Filter advantages?They can have exactly linear phaseThey are always stableStartup transients are finite in durationAll of these  (Correct Answer)8. A ______ is any process that produces an output signal in response to an input signalAns: system9. ______ defines the distribution of energy or power per unit bandwidth as a function of frequency.Ans: spectral density10. An impulse signal in the time domain is represented as a _______ in the frequency domainAns: dc signal11. This is a requirement for linearityhomogeneity  additivityshift invarianceall of these  (Correct Answer)12. What are the IIR Filter advantages?Lower order for same specs  Lower group delayLess arithmetic involvedAll of these  (Correct Answer)13. All of these are FIR Filter design techniques except: Windowing  Modeling of desired impulse response  (Correct Answer)Equiripple or Minimax DesignLeast squares14. ______ is a compression standard for digital video sequences, such as used in computer video and digital television networksAns: MPEG15. This Fourier Transform property states that if a function v(t) is shifted in the positive direction by an amount t0, the effect is equivalent to multiplying its Fourier transform V(f) by the factor exp(-j2 * pi * ft0).Ans: Time shifting