Preface.
1. Introduction. 1.1 Signals Application in Systems. 1.2 Signals Classification. 1.3 Basic Signals. 1.4 Methods of Signals Presentation and Sescription. 1.5 Signals Transformation in Orthogonal Bases. 1.6 Summary. 1.7 Problems.
2. Spectral Presentation of Signals. 2.1 Introduction. 2.2 Presentation of Periodic Signals by Fourier Series. 2.3 Presentation of Signals by Fourier Transform. 2.4 Spectral Densities of Simple Single Pulses. 2.5 Spectral Densities of Complex Single Pulses. 2.6 Spectrums of Periodic Pulses. 2.7 Sectral Densities of Pulse-Bursts. 2.8 Spectrums of Periodic Pulse-Bursts. 2.9 Signal Widths. 2.10 Summary. 2.11 Problems.
3. Signal Modulation. 3.1 Introduction. 3.2 Types of Modulation. 3.3 Amplitude modulation. 3.4 Amplitude Modulation by Impulse Signals. 3.5 Amplitude Modulation by Periodic Pulses. 3.6 Types of Analog AM. 3.7 Types of Impulse AM. 3.8 Frequency Modulation. 3.9 Linear Frequency Modulation. 3.10 Frequency Shift Keying. 3.11 Phase Modulation. 3.12 Phase Shift Keying. 3.13 Summary. 3.14 Problems.
4. Signals Energy and Correlation. 4.1 Introduction. 4.2 Signal Power and Energy. 4.3 Signal Autocorrelation. 4.4 Energy and Power Spectral Densities. 4.5 Single Pulse with LFM. 4.6 Complex Phase-Coded Signals. 4.7 Signal Cross-Correlation. 4.8 Width of the Autocorrelation Function. 4.9 Summary. 4.10 Problems.
5. Bandlimited Signals. 5.1 Introduction. 5.2 Signals with Bandlimited Spectrum. 5.3 Hilbert Transform. 5.4 Analytic Signal. 5.5 Interpolation. 5.6 Sampling. 5.7 Summary. 5.8 Problems.
A. Tables of Fourier series and transform properties. B. Tables of Fourier series and transform of basic signals. C. Tables of Hilbert transform and properties. D. Mathematical formulas. References. Index.

Continuous-Time Signals is an extended description of continuous-time signals related to the course of Signals and Systems. As a time-varying process of any physical state of any object, which serves for representation, detection, and transmission of messages, a modern electrical signal possesses, in applications, many specific properties. To make possible for readers to deal with signals free, the book systematically covers major principle foundations of the signals theory. The representation of signals in the frequency domain (by Fourier transform) is considered with strong emphasis on how the spectral density of a single waveform becomes that of its burst and then the spectrum of its train. Different kinds of amplitude and angular modulations are analyzed noticing a consistency between the spectra of modulating and modulated signals. The energy and power presentation of signals is given along with their correlation properties. Finally, presenting the bandlimited and analytic signals, the book elucidates the methods of their description, transformation (by Hilbert transform), and sampling.