Conclusion

Introduction to Design of System

  • Performance Specification(性能规范)

Time domain and Frequency domain

Fourier Transform

\[ \begin{array}{c} X_{k}=\sum_{n=0}^{N-1} x_{n} \cdot e^{-i 2 \pi k n / N} \\ \\ x_{n}=\frac{1}{N} \sum_{k=0}^{N-1} X_{k} \cdot e^{i 2 \pi k n / N} \end{array} \]