DescriptionThe second edition of Digital Communications is updated to include current techniques and systems used in the rapidly expanding field of fixed and mobile communications. The text has comprehensive coverage of digital communications without going into unnecessary detail or irrelevant topics. Its main aims are to develop the mathematical theory behind signal processing and use this knowledge to develop fixed and mobile data communications systems.Key FeaturesAn introduction to the basic concepts of modulation, switching and transmissionDiscussion of how the performance of a system can be simulated before constructionDescribes modern systems including satellite communications and cellular radioIncludes network design, including information on access techniques and ISDN.A good balance of theory, practical examples and case-studies.SI units used throughout.Table of ContentsPart I: Signals and Systems TheoryDigital Communications OverviewPeriodic and Transient SignalsRandom Signals and NoiseLinear SystemsPart II: Digital Communications PrinciplesSampling, Multiplexing, and PCMBandbased Transmission and Line CodingDecision TheoryOptimum Filtering for Transmission and ReceptionInformation Theory and Source CodingError Control CodingBandpass Modulation of a Carrier SignalSystem Noise and Communications Link BudgetsCommunication Systems SimulationsPart III: ApplicationsFixed Point Microwave CommunicationsMobile and Cellular RadioVideo Transmission and StoragePart IV: NetworksQueuing Theory for Packet NetworksNetwork Topology and ProtocolsPublic Networks and the Integrated Services Digital Network (ISDN)