Time-frequency analysis is a central subfield of signal processing. It includes signal representation in frames, the short-time Fourier transform, wavelet transform, and Wigner-Ville distribution. All these topics are presented in detail in this book, along with the necessary mathematical background. Additionally, there is an introduction to estimation methods used in signal processing. A variety of current examples from medicine, automotive engineering, business administration, and image processing help to establish the practical relevance.