This newly revised and expanded edition of an Artech House classic builds on its success as far and away the most comprehensive guide to digital modulation techniques used in communications today. It devotes five new chapters to orthogonal frequency division multiplexing (OFDM) including its synchronization, performance in fading channels, channel estimation and equalization, peak-to-average power reduction techniques, and non-FFT based OFDM. The second edition includes new modulations for optical communications and enhanced coverage of M-ary ASK, pulse shaping, and mitigation methods like channel estimate and diversity techniques. It also adds a fast-access comparison of all modulation schemes that will prove indispensable for various research and design tasks. You get full details for every technique including operation principles, bit error probability, spectral characteristic, modulator, demodulator, synchronizer, performance in fading channels, comparison with other techniques, and applications. The book makes it easy to find implementation diagrams or data like BER and bandwidth occupied by each scheme for a given data rate, and allows you to confidently formulate modulation schemes and determine which schemes are best for your applications. Almost all schemes and their performance evaluation expressions are backed by derivation or proof, giving you the analytical background needed to improve or modify schemes for specific applications. Nearly 400 illustrations include block diagrams of modulator, demodulator, and synchronizer for most modulation schemes. Plus, new appendixes covering trigonometry identities, Fourier transform pairs and properties, and Q-function and error function values provide even more time-saving assistance for your work.
Table Of Contents
Introduction Digital Communication Systems. Communication Channels. Basic Modulation Methods. Criteria of Choosing Modulation Schemes. Overview of Digital Modulation Schemes and Comparison. ; Baseband Modulation (Line Codes) Differential Coding. Description of Line Codes. Power Spectral Density of Line Codes. Bit Error Rate of Line Codes. Substitution Line Codes. Block Line Codes. Pulse Position Modulation. Pulse Interval Modulation. Pulse Width Modulation. Modulation for Optical Transmission. ; Frequency Shift Keying Binary FSK. Coherent Demodulation and Error Performance. Noncoherent Demodulation and Error Performance. M-ary FSK. Demodulation Using Discriminator. Synchronization. ; Phase Shift Keying Binary PSK. Differential BPSK. M-ary PSK. PSD of MPSK. Differential MPSK. Quadrature PSK. Differential QPSK (DQPSK). Offset QPSK (OQPSK). p/4-QPSK. Synchronization. ; Minimum Shift Keying and MSK-type Modulations Description of MSK. Power Spectrum and Bandwidth. Modulator. Demodulator. Synchronization. Error Probability. Serial MSK. MSK-type Modulation Schemes. Sinusoidal Frequency Shift Keying. Simon 's Class of Symbol-Shaping Pulses. Rabzel and Pathupath 's Symbol-Shaping Pulses. Bazin 's Class of Symbol-Shaping Pulses. MSK-type Signal 's Spectral Main Lobe. ; Continuous Phase Modulation Description of CPM. Power Spectral Density. MLSD for CPM and Error Probability. Modulator. Demodulator. Synchronization. Gaussian Minimum Shift Keying. ; Multi-h Continuous Phase Modulation MHPM Signal, Phase Tree and Trellis. Power Spectral Density. Distance Properties and Error Probability. Modulator. Demodulator and Synchronization. Improved MHPM Schemes. ; Amplitude Shift Keying (ASK) On-Off Keying. M-ary Amplitude Shift Keying. Bipolar Symmetrical M-ary ASK. Unipolar M-ary ASK. Comparison with PSK. ; Quadrature Amplitude Modulation QAM Signal Description. QAM Constellations. Power Spectral Density. Modulator. Demodulator. Error Probability. Synchronization. Differential Coding in QAM. ; Nonconstant-Envelope Bandwidth-Efficient Modulations Two-Symbol-Period Schemes and Optimum Demodulation. Quasi-Bandlimited Modulation. QORC, SQORC, and QOSRC. IJF-OQPSK and TSI-OQPSK. Superposed-QAM. Quadrature Quadrature PSK. ; Performance of Modulations in Fading Channels and Equalization Fading Channel Characteristics. Digital Modulation in Slow, Flat Fading Channels. Digital Modulation in Frequency Selective Channels. p/4-DQPSK in Fading Channels. MHPM in Fading Channels. QAM in Fading Channels. Equalization. Other Remedial Measures Against Fading. ; Orthogonal Frequency Division Multiplexing (OFDM) Multi-Carrier Modulation and OFDM. OFDM Signal and Spectrum. IFFT/FFT Pair Implementation of OFDM. ISI and ICI in OFDM ;