700+ câu Trắc nghiệm Xử lý số liệu tín hiệu đáp án - Phần 12

$H\left(e{}^{j\omega }\right)=\frac{1}{2\pi }\cdot {\displaystyle \sum }_{n=\infty }\mathrm{Unsupported\; }h\left(n\right)e{}^{-j\omega n}$

$H\left(e{}^{j\omega }\right)={\displaystyle \sum }_{n=-\infty }\mathrm{Unsupported\; }h\left(n\right)e{}^{j\omega n}$

$H\left(e{}^{j\omega }\right)=\frac{1}{2\pi }\cdot {\displaystyle \sum }_{n=-\infty }\mathrm{Unsupported\; }h\left(n\right)e{}^{j/\omega n}$

$H\left(e{}^{j\omega }\right)={\displaystyle \sum }_{n=\infty }\mathrm{Unsupported\; }h\left(n\right)e{}^{-j\omega n}$

$x\left(e{}^{j\omega }\right)=\left|x\left(e{}^{j\omega }\right)\right|e{}^{j\omega \left(\omega \right)}$

$x\left(e{}^{i\sigma }\right)=\left|A\left(e{}^{i\sigma s}\right)\right|e{}^{i\phi \left(m\right)}$

$X\left(e{}^{j\omega }\right)=A\left(e{}^{j\omega }\right)\cdot e{}^{j\phi \left(x\right)}$

$X\left(e{}^{j\omega }\right)=\left|X\left(e{}^{j\omega }\right)\right|e{}^{j,\text{a}\text{r}\text{g}\left|X\left(e{}^{j\omega }\right)\right|}$

$X\left(\omega \right)=e{}^{-j\omega }$

không tồn tại FT B. $X\left(\omega \right)=e{}^{j\omega }$

$X\left(\omega \right)=1$

$X\left(\omega \right)=2e{}^{-j\omega }+3$

$X\left(\omega \right)=2e{}^{-j\omega }-3$

$X\left(\omega \right)=2e{}^{j\omega }+3$

$X\left(\omega \right)=2e{}^{j\omega }-3$

$x\left(n\right)=u\left(n\right)$

$x\left(n\right)=r\left(n\right)$

$x\left(n\right)=\text{r}\text{e}\text{c}\text{t}{}_N\left(n\right)$

$x\left(n\right)=2{}^{n}u\left(n\right)$

$X\left(\omega \right)=2e{}^{j\omega }+1+3e{}^{-j\omega }$

$X\left(\omega \right)=2e{}^{j\omega }+1-3e{}^{-j\omega }$

$X\left(\omega \right)=2e{}^{j\omega }+3e{}^{-j\omega }$

$X\left(\omega \right)=e{}^{j\omega }+1+e{}^{-j\omega }$

$X\left(\omega \right)=1+2e{}^{-j\omega }+4e{}^{-2/\omega }$

$X\left(\omega \right)=1+2e{}^{-j\omega }+4e{}^{-3/\omega }$

$X\left(\omega \right)=1+2e{}^{j\omega }+4e{}^{3j\omega }$

$X\left(\omega \right)=1+2e{}^{j\omega }+4e{}^{2/\omega }$

$X\left(\omega \right)=1+2e{}^{-\gamma \omega }+4e{}^{-2/\omega }$

$X\left(\omega \right)=1+2e{}^{-j\omega }+4e{}^{-3/\omega }$

$X\left(\omega \right)=1+2e{}^{j\omega }+4e{}^{3,\omega }$

$X\left(\omega \right)=1+2e{}^{j\omega }+4e{}^{2/\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-1/\omega }+4e{}^{-2/\omega }\right)e{}^{-2/\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-j\omega }+4e{}^{-3j\omega }\right)e{}^{-2j\omega }$

$X\left(\omega \right)=\left(1+2e{}^{j\omega }+4e{}^{3/\omega }\right)e{}^{-2/\omega }$

$X\left(\omega \right)=\left(1+2e{}^{j\omega }+4e{}^{2/\omega }\right)e{}^{-2/\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-j\omega }+4e{}^{-2j\omega }\right)e{}^{-2j\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-j\omega }+4e{}^{-4j\omega }\right)e{}^{-2j\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-j\omega }+4e{}^{3/\omega }\right)e{}^{2/\omega }$

$X\left(\omega \right)=\left(1+2e{}^{-j\omega }+4e{}^{-3/\omega }\right)e{}^{2/\omega }$

$y\left(n\right)=2x\left(n\right)+x\left(n-1\right)$

$y\left(n\right)=2x\left(n-1\right)+x\left(n-3\right)$

$y\left(n\right)=3x\left(n-1\right)+2x\left(n-2\right)+2x\left(n-3\right)$

$\text{y}\left(\text{n}\right)=3\text{x}\left(\text{n}-1\right)+2\text{x}\left(\text{n}-2\right)+\text{x}\left(\text{n}+2\right)$

$H\left(\omega \right)=\frac{1}{1-\frac{1}{2}e{}^{j\omega }}$

$H\left(\omega \right)=\frac{1}{1+\frac{1}{2}e{}^{j\omega }}$

$H\left(\omega \right)=\frac{1}{1+\frac{1}{2}e{}^{-j\omega }}$

$H\left(\omega \right)=\frac{1}{1-\frac{1}{2}e{}^{-j\omega }}$

$X\left(\omega \right)=\frac{1}{1-5e{}^{-j\omega }}$

$X\left(\omega \right)=-\frac{1}{1-5e{}^{-j\omega }}$

$X\left(\omega \right)=\frac{1}{1+5e{}^{-j\omega }}$

Không tồn tại biến đổi Fourier rời rạc thời gian (DTFT)

$X\left(\omega \right)=\frac{1}{1-0.5e{}^{-j\omega }}$

$X\left(\omega \right)=\frac{1}{1-0.5e{}^{j\omega }}$

$X\left(\omega \right)=\frac{1}{1+0.5e{}^{-j\omega }}$

Không tồn tại biến đổi Fourier rời rạc thời gian (DTFT)

$X\left(\omega \right)=\frac{3}{1-0.5e{}^{-j\omega }}$

$X\left(\omega \right)=\frac{0.5}{1-3e{}^{j\omega }}$

$X\left(\omega \right)=\frac{3}{1-0.5e{}^{j\omega }}$

Không tồn tại biến đổi Fourier rời rạc thời gian (DTFT)

$H\left(\omega \right)=\frac{1}{1+\left(0.8\right)e{}^{j/\omega }}$

$H\left(\omega \right)=\frac{1}{1+\left(0.8\right)e{}^{-j\omega }}$

$H\left(\omega \right)=\frac{1}{1-\left(0.8\right)e{}^{-j\omega }}$

Không tồn tại biến đổi Fourier rời rạc thời gian (DTFT)