a) This is an example of the scaling property.
i.e. if x(t) -------> xn
then x(at) --------> xn but the operating frequency becomes a times and time period becomes To/a.
b) According to the differentiation property:
if x(t) -------> xn
and y(t) ---------> yn
if y(t) =
then yn = ()xn
3. Let x, and yn be the Fourier series coefficients of (t) and y(t), respectively Assuming the period of r(t) is To. express y, in terms of (a) y(t)-x(at), where a 0. dt 3. Let x, and yn be...
plz 1. Let and y be the Fourier series coefficients of r(t) and y(t), respectively. Assuming the period of r(t) is T, express y in terms of d (b) y(t) (10 pts) () (a) y(t) (at), where a 0. (10 pts) dt 1. Let and y be the Fourier series coefficients of r(t) and y(t), respectively. Assuming the period of r(t) is T, express y in terms of d (b) y(t) (10 pts) () (a) y(t) (at), where a 0....
Let x(t) and y(t) be periodic signals with fundamental period T and Fourier coefficients αn and βn, respectively. Use the properties of Fourier series and find the Fourier series coefficients of the following signals in terms of@n, βn, or both. a) V,(t) = x(t-to) + x(t + to) b) yb (t) = 2x(t-1) + 3y(t-1) c) ye(t) = x(-t) + x(-t-to) d) ya(t)=x(t)y(t) 1.
Let x(t) = t, 0<t 1 and Fourier series coefficients a , be a periodic signal with fundamental period of T 2 -t,-1t0 dz(t) a) Sketch the waveform of r(t)d3 marks) b) Calculate ao (3 marks) c) Determine the Fourier series representation of gt)(4 rks) d) Using the results from Part (c) and the property of continuous-time Fourier series to dr(t) determine the Fourier series coefficients of r(t) (4 marks)
(a) Let the correlation be defined as r (t) x(T) y (tT) dT T Express R jw= F{r (t)} in terms of X (jw) and Y (jw), the Fourier transform of x (t) and y (t) respectively. (b) Suppose (t) = y (t) = e-H. Find R (jw) using frequency domain properties and the relationship derived in (a) extra Find R (jw) by evaluating the convolution integral in the time domain to get r (t) and then doing the FT.
2.6 Let x(t) and y(t) be two periodic signals with period To, and let X, and yn denote the Fourier series coefficients of these two signals. Show that 7. Le***0*n di = § 00 2.7 Show that for all periodic physical signals that have finite power, the coefficients of the Fourier series expansion x,, tend to zero as n → .
6) If a continuous-time periodic signal has the Fourier series coefficients ak, where k = 0, +1, +2, +3,..., derive the Fourier series coefficients bk of the following signals in terms of aki a) <(-t) b) x*(t) c) x(t – t.) where t, is a constant e) (t) dt In part e), assume that the average value of x(t) is zero.
1. (45 pts) DT FS. Find the fundamental period and the Fourier Series (FS) spectral coefficients for these periodic signals. Sketch the spectrum in magnitude and phase. Express each x[n] as the sum of the spectral coefficients for k = [0, N-1]. a. ?1[?] = ???( ? 3 ?) b. ?2 [?] = cos ( ? 3 ?) + sin( ? 4 ?) c. ?3[?]
d) [10] The figure below shows the Fourier series coefficients ak of the DT periodic signal x[n]. i. ii. [5] Use Parseval's relation to determine the average power of x[n]. [5] Let bx be the Fourier series coefficients of a DT signal y[n). Without computing x[n], determine bk in terms of ak if y[n] is related to x[n] by y[n] = ejinx[n] Plot bk for k=0,1,2, ... 7. ak 16
2. If x(t) is a real periodic signal with fundamental period T and Fourier series coefficients ak, show that if r(t) is even, then its Fourier series coefficients must be real and even. [10 points]
For the function y 1-x for 0 s x s 1 Graph the function's 3 periods 1) Find its formulas for the Fourier series and Fourier coefficients 2) Write out the first three non-zero terms of the Fourier Series 3) 4) Graph the even extension of the function 5) Find the Fourier series and Fourier coefficients for the even extension 6) Write out the first three non-zero terms of the even Fourier series 7) Graph the odd extension of the...