Performance Optimization of Digital Communications Systems (Hardcover)

IntroductionAbout This BookAcknowledgmentsMethod for Determining the Quality of aCommunication ChannelBackground Main Idea Illustrated and a Minimization Principle Phase-Spanning Nyquist Set TestFrequency-Spanning Nyquist Set Test Determining the Noise Level in a Nonbaseband SystemMeasuring the Level of a Useful Signal Conclusions Digital Communications in Stealth Mode Background Stealth Communications Transceiver Test on Randomness BER Performance Using a Decoy Signal Conclusions Pulse Shape OptimizationBackground Pulse Shape Optimization Criterion SO-Pulse and L-Pulse Phi-Pulse BER TestApproximation of Pulses by SAS Data Windows Corresponding to the Pulses IntroducedRaised Pulses Conclusions Optimal Phase Shifters for Peak-to-Average Power RatioReduction in Multicarrier Communication SystemsBackground Optimal Phase Shifters and the Constant Envelope PrincipleFlat Spectrum Chirps Simulations of Multicarrier TransmissionPossible Applications of FSC Conclusions Optimization of the Automatic Repeat Request Parametersin Quadrature Amplitude Modulation ChannelsBackground Derivation of the BER of a QAM Channel with FEC and ARQ ARQ Performance GainA Method of Estimating the ARQ GainA Procedure for Determining the Optimum ARQ ParametersExtension of the Method for the Case of a Slowly FadingChannel Determining the Average Number of Transmissions and theUncoded SER, Given the SER Past FEC/ARQDetermining an Average Fraction of Erroneous Bits in anErroneous QAM SymbolConclusions Optimal Selection of Error Correction and RetransmissionParameters in Multichannel Communications SystemsBackground Performance Gain Due to FEC/ARQ in Discrete MultitoneSystemsMean-Field Approximation for Multicarrier Channelwith ARQAn Approximate Solution of Equation 7.2.2 Optimization of FEC and ARQ Parameters for Current ADSLStandards Conclusions Bit Error Rate of Self-Similar Constellationsin ADSL Systems Background Self-Similarity of ADSL QAM ConstellationsError Probability Function of an ADSL QAM Constellation Encoder Nonsquare Constellations: An Asymptotic AnalysisComparison with Numerical SimulationsConclusions Throughput Optimization in a General DuplexCommunications System with FEC and ARQ Background A System Model with FEC and ARQJoint Optimization of FEC and ARQ Parameters in Both Directions Conclusions A Quantitative Procedure of Optimizing the MAC PacketSize in TCP/IP-Compliant NetworksBackground Statement of the Problem of Optimizing the MAC Packet Sizein TCP/IP-Compliant NetworksDerivation of Equation 10.2.6Determining the Optimal MAC Packet Size in the Case of aVariable MAC Frame Length Solution to the Problem and Decision Diagrams Extension of the Method in the Case of a Fixed MAC FrameLength Extension of the Method to Account for Error Detectionand Retransmission in the TCP/IP Protocol Application to 802.11-Compliant NetworksConclusions AppendicesAOptimization PuzzlesBMATLAB Scripts for the Bandwidth Optimization Problem CMore about Flat Spectrum Chirps