Lee, William C Y creator text xx New Delhi Wiley India Pvt. Ltd. India 2014,c1993 9999 2nd monographic und

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372 Contents The Mobile Radio Environment. · Representation of a Mobile Radio Signal. · Causes of Propagation Path Loss. · Causes of Fading. · Reciprocity Principle. · Definitions of Necessary Terms and Their Applications. Prediction of Propagation Loss. • The Philosophy behind the Prediction of Propagation Loss. • Obtaining Meaningful Propagation-Loss Data from Measurements. • Prediction over Flat Terrain. • Point-to-Point Prediction (Path-Loss Prediction over Hilly Terrain). • Other Factors. • The Merit of Point-to-Point Prediction. • Microcell Prediction Model. Calculation of Fades and Methods of Reducing Fades. • Amplitude Fades. • Random PM and Random FM. • Selective Fading and Selective Random FM. • Diversity Schemes. • Combining Techniques. • Bit-Error Rate and Word-Error Rate in Fading Environment. • Calculation of Signal Strength above a Level in a Cell (for a Stationary Mobile Unit). • Single-Sideband (SSB) Modulation. Mobile Radio Interference. • Noise-Limited and Interference-Limited Environment. • Co-channel and Adjacent-Channel Interference. • Intermodulation (IM). • Near-End-to-Far-End Ratio. • Intersymbol Interference. • Simulcast Interference. • Radius of Local Scatterers. Frequency Plans and Their Associated Schemes. • Channelized Schemes and Frequency Reuse. • Frequency-Division Multiplexing (FDM). • Time-Division Multiplexing (TDM). • Spread Spectrum and Frequency Hopping. • Cellular Concept. • Spectral Efficiency and Cellular Schemes. Design Parameters at the Base Station. • Antenna Locations. • Antenna Spacing and Antenna Heights. • Antenna Configurations. • Noise Environment. • Power and Field Strength Conversions. Design Parameters at the Mobile Unit. • Antenna Spacing and Antenna Heights. • Mobile Unit Standing Still and in Motion. • Independent Samples and Sampling Rate. • Directional Antennas and Diversity Schemes. • Directional Antennas. • Frequency Dependency and Independency. • Noise Environment. • Antenna Connections and Locations on the Mobile Unit. • Field Component Diversity Antennas. Signaling and Channel Access. • Criteria of Signaling Design. • False-Alarm Rate. • Word-Error Rate. • Channel Assignment. • Switching Capacity Consideration. Cellular CDMA. • Why CDMA? • Narrowband (NB) Wave Propagation. • Wideband (WB) Signal Propagation. • Key Elements in Designing Cellular. • Spread Techniques in Modulation. • Description of DS Modulation. • Capacities of Multiple-Access Schemes. • Reduction of Near-Far Ratio Interference in CDMA. • Natural Attributes of CDMA. Microcell Systems. • Design of a Conventional Cellular System. • Description of New Microcell System Design. • Analysis of Capacity and Voice Quality. • Reduction of Hand-offs. • System Capacity. • Attributes of Microcell. Miscellaneous Related Systems. • PCS (Personal Communications Service). • Portable Telephone Systems. • Air-to-Ground Communications. • Land-Mobile/Satellite Communications System. References. Problems. Index Electronics 621.384 56 LEE 9788126532582 Allied Informatics, Jaipur BSDU 170602 20190315135229.0 0001967 English