Contents XV 15 SPREAD-SPECTRUM COMMUNICATION SYSTEMS 825 15.1 Model of a Spread-Spectrum Digital Communication System 826 15.2 Direct Sequence Spread-Spectrum Systems 827 15.2.1 Effect of Despreading on a Narrowband Interference,830 15.2.2 Probabiliry of Error at the Detector.831 15.2.3 Perfonnance of Coded Spread-Spectrum Signals,836 15.3 Some Applications of DS Spread-Spectrum Signals 836 15.3.1 Low-Detectability Signal Transmission,836 15.3.2 Code Division Multiple Access,837 15.3.3 Communication over Channels with Multipath,838 15.3.4 Wireless LANs.839 15.4 Generation of PN Sequences 840 15.5 Frequency-Hopped Spread Spectrum 843 15.5.1 Slow Frequency-Hopping Systems and Partial-Band Interference,844 15.5.2 Fast Frequency Hopping,847 15.5.3 Applications of FH Spread Spectrum,848 15.6 Synchronization of Spread-Spectrum Systems 849 15.6.1 Acquisition Phase,849 15.6.2 Tracking,852 15.7 Digital Cellular Communication Systems 856 15.7.1 The GSM System,858 15.7.2 CDMA System Based on IS-95,862 15.7.3 ThirdGeneration Cellular Communication Systems and Beyond,866 15.8 Summary and Further Reading 868 Problems 869 REFERENCES 877 INDEX 886Contents 15 SPREAD-SPECTRUM COMMUNICATION SYSTEMS 15. 1 Model of a Spread-Spectrum Digital Communication System 826 15.2 Direct Sequence Spread-Spectrum Systems 827 15.2.1 Effect of Despreading on a Narrowband lnte1ference, 830 15.2.2 Probability of Error at the Detecto1; 831 15.2.3 Pe1formance of Coded Spread-Spectrum Signals, 836 15.3 Some Applications of DS Spread-Spectrum Signals 836 15.3.I Low-Detectability Signal Transmission, 836 15.3.2 Code Division Multiple Access, 837 15.3.3 Communication over Channels with Multipath, 838 15.3.4 Wireless LANs, 839 15.4 Generation of PN Sequences 840 15.5 Frequency-Hopped Spread Spectrum 843 15.5.I Slow Frequency-Hopping Systems and Partial-Band Interference, 844 15.5.2 Fast Frequency Hopping, 847 15.5.3 Applications of FH Spread Spectrum, 848 15.6 Synchronization of Spread-Spectrum Systems 849 15.6.J Acquisition Phase, 849 15.6.2 Tracking, 852 15.7 Digital Cellular Communication Systems 856 15.7.1 T�e GSM System, 858 15.7.2 CDMA System Based on IS-95, 862 15. 7.3 Third Generation Cellular Communication Systems and Beyond, 866 15.8 Summary and Further Reading 868 Problems 869 xv 825 REFERENCES 877 INDEX 886