Communications Signals and Signal Processing
Computer data communications systems today rely almost entirely on electrical signals to represent the information being conveyed. Such representations may be analog voltages or currents, electromagnetic radio waves, stored electrical charges, digital voltage pulses, or the states of digital electronic gating circuits. Even with lightguide transmission, signals must be converted to and from electrical form at each end of the optical channel for processing and interfacing to the terminal equipment. Thus a solid understanding of electrical signals, filtering, and modulation is a fundamental prerequisite to any meaningful understanding of data communications.
KeywordsDigital Signal Processing Signal Spectrum Communication Signal Digital Modulation Baseband Signal
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