Contents Preface 1 Introduction to Communications Systems 2 Radio-Frequency Circuits 3 Amplitude Modulation 4 Angle Modulation 5 Transmitters 6 Receivers 7 Digital Communication 8 The Telephone System 9 Data Transmission 10 Local-Area Networks 11 Wide-Area Networks and the Internet 12 Digital Modulation and Modems 13 Multiplexing and Multiple-Access Techniques 14 Transmission Lines 15 Radio-Wave Propagation 16 Antennas 17 Microwave Devices 18 Terrestrial Microwave Communication Systems 19 Television 20 Satellite Communication 21 Cellular Radio 22 Personal Communication Systems 23 Paging and Wireless Data Netwaorking 24 Fiber Optics 25 Fiber-Optic Systems APPENDICES