Chapter 5 AM, FM, and digital modulation systems
1 Chapter 5 AM,FM, and digital modulation systems
5.0 Introduction (Chapter objectives Amplitude modulation and single sideband Frequency and phase modulation Digitally modulated signals(ooK, BPSK, FSK, MSK MPSK, QAM, QPSK, a/4QPSK, and OFDM) Spread sprectrum and cdma system
2 5.0 Introduction (Chapter objectives) • Amplitude modulation and single sideband • Frequency and phase modulation • Digitally modulated signals(OOK, BPSK, FSK, MSK MPSK, QAM, QPSK, π/4QPSK, and OFDM) • Spread sprectrum and CDMA system
5.0 Introduction (the goal of this chapter) Study g(t)and s(t) for various types of analog and digital modulations Evaluate the spectrum for various types of analog and digital modulations Examine some transmitter and receiver structures Learn about spread spectrum systems
3 5.0 Introduction (the goal of this chapter) • Study g(t) and s(t) for various types of analog and digital modulations • Evaluate the spectrum for various types of analog and digital modulations • Examine some transmitter and receiver structures • Learn about spread spectrum systems
5.0 Introduction (the key of this chapter) a Grasping phase modulation and frequency modulation Grasping Binary modulation and Bandpass signaling Grasping Multilevel Modulated bandpass signaling Grasping Minimum-shift keying(MSK)and GMSK Knowing the principle of FDM, OFDM and Spread Spectrum Systems
4 5.0 Introduction (the key of this chapter) • Grasping phase modulation and frequency modulation • Grasping Binary modulation and Bandpass signaling • Grasping Multilevel Modulated bandpass signaling • Grasping Minimum-shift keying (MSK)and GMSK • Knowing the principle of FDM, OFDM and Spread Spectrum Systems
5.0 Introduction (band-pass signal and its spectra) Communication system constructure signal g(t) carrier s(t) Transmission Medium processing circuits (channel) transmitter r(t) carrier g(t) signal output circuits processing Modulation is the process of imparting the source information onto a Band-pass signal with a carrier frequency f by the introduction of amplitude or phase perturbations or both
5 5.0 Introduction (band-pass signal and its spectra) • Communication system constructure input signal processing carrier circuits Transmission Medium (channel) transmitter g(t) s(t) carrier circuits signal processing r(t) g(t) output • Modulation is the process of imparting the source information onto a Band-pass signal with a carrier frequency fc by the introduction of amplitude or phase perturbations or both