© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Wireless Communications Principles and Practice 2/e T.S. Rapppaport Chapter.

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Presentation transcript:

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Wireless Communications Principles and Practice 2/e T.S. Rapppaport Chapter 6: Modulation Techniques for Mobile Radio

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Analog and Digital Modulation, Line Coding, AM/FM/SSB

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Digital Fundamentals: The Sampling Theorem, Nyquist Sampling

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Key Digital Modulation Techniques: BPSK, OFDM, GMSK

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Spread Spectrum: DS-SS, FH-SS, Coding Gain, Fading Margins

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Amplitude Modulation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Double Sideband Spectrum

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. SSB Modulators

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Tone-in Band SSB

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Product Detection

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. VCO circuit

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Wideband FM generation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Slope Detector for FM

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Digital Demod for FM

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. PLL Demod for FM

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Phase-shift quadrature FM demod

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. FM Demod circuit

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Line Coding spectra

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. RZ and NRZ Line Codes

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Nyquist Pulses for zero-ISI

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Raised Cosine Spectrum

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Spectrum of Raised Cosine pulse

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Raised Cosine pulses

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. RF signal usig Raised Cosine

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Gaussian pulse-shapes

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. BPSK constellation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Virtue of pulse shaping

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. BPSK Coherent demodulator

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Differential PSK encoding

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. DPSK modulation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. DPSK receiver

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. QPSK constellation diagrams

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Virtues of Pulse Shaping

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. QPSK modulation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. QPSK receiver

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Offset QPSK waveforms

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Pi/4 QPSK signaling

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Pi/4 QPSK phase shifts

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Pi/4 QPSK transmitter

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Differential detection of pi/4 QPSK

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. IF Differential Detection

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. FM Discriminator detector

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. FSK Coherent Detection

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Noncoherent FSK

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Minimum Shift Keying spectra

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. MSK modulation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. MSK reception

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. GMSK spectral shaping

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. GMSK spectra shaping

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Simple GMSK generation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. GMSK Demodulator

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Digital GMSK demodulator

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. 8-PSK Signal Constellation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Bandwidth vs. Power Efficiency

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Pulse Shaped M-PSK

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. 16-QAM Signal Constellation

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. QAM efficiencies

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. M-ary FSK efficiencies

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. PN Sequence Generator

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Direct Sequence Spread Spectrum

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Direct Sequence Spreading

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Frequency Hopping Spread Spectrum

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. CDMA – Multiple Users

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Effects of Fading

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Irreducible Bit Error Rate due to multipath

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Irreducible Bit Error Rate due to multipath

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Simulation of Fading and Multipath

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Irreducible BER due to fading

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. Irreducible BER due to fading

© 2002 Pearson Education, Inc. Commercial use, distribution, or sale prohibited. BER due to fading & multipath