Chapter 4 Bandpass signaling Principles and Circuits
1 Chapter 4 Bandpass Signaling Principles and Circuits
Introduction (chapter objectives Complex envelopes and modulated e signals Spectra of bandpass signals .. Nonlinear distortion .. Communication circuits(mixers, phase locked loops, frequency synthesizers, and detectors) e. Transmitters and receivers Software radios
2 Introduction (chapter objectives) • Complex envelopes and modulated signals • Spectra of bandpass signals • Nonlinear distortion • Communication circuits(mixers, phaselocked loops, frequency synthesizers, and detectors) • Transmitters and receivers • Software radios
Introduction(main goals) Mastering how to represent complex envelope of bandpass waveform. . The principle of bandpass filtering and linear distortion Bandpass sampling theorem Nolinear distortion Detector circuits Knowing PLL, DDC, general principle of Transceiver, concept of software radios
3 Introduction(main goals) • Mastering how to represent complex envelope of bandpass waveform. • The principle of bandpass filtering and linear distortion • Bandpass sampling theorem • Nolinear distortion • Detector circuits • Knowing PLL, DDC, general principle of Transceiver, concept of software radios
Introduction The bandpass communication signal is obtained by modulating a baseband analog or digital signal onto a carrier. Complex envelope can represent any type of bandpass signal
4 Introduction • The bandpass communication signal is obtained by modulating a baseband analog or digital signal onto a carrier. • Complex envelope can represent any type of bandpass signal
4.1 Complex Envelope Representation of Bandpass Waveforms general representation for bandpass igital and analog signals Representation for modulated signal Representation for bandpass noise
5 4.1 Complex Envelope Representation of Bandpass Waveforms • general representation for bandpass digital and analog signals • Representation for modulated signal • Representation for bandpass noise