OFDM and MC-CDMA a primer 经典OFDM教材下载【共一个文件】

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OFDM and MC-CDMA A Primer.rar (10.72 MB, 下载次数: 509 )

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1 Introduction 1
1.1 MotivationoftheBook............................. 1
1.2 Orthogonal Frequency Division Multiplexing History . . . .......... 5
1.2.1 EarlyClassicContributionsandOFDMStandards .......... 5
1.2.2 Peak-to-MeanPowerRatio....................... 6
1.2.3 Synchronisation ............................ 8
1.2.4 OFDM/CDMA............................. 8
1.2.5 Decision-DirectedChannelEstimation................. 8
1.2.6 Uplink Detection Techniques for Multi-User SDMA-OFDM . . . . . 13
1.2.7 OFDMApplications .......................... 16
1.3 Outline of the Book . . ............................. 16
1.4 ChapterSummaryandConclusion ....................... 18

I OFDMSystemDesign 19
2 Introduction to Orthogonal Frequency Division Multiplexing 21
2.1 Introduction . . . . . . ............................. 21
2.2 PrinciplesofQAM-OFDM........................... 23
2.3 Modulation by DFT . . ............................. 25
2.4 TransmissionviaBandlimitedChannels .................... 29
2.5 BasicOFDMModemImplementations..................... 32
2.6 CyclicOFDMSymbolExtension........................ 35
2.7 Decision-DirectedAdaptiveChannelEqualisation............... 36
2.8 OFDMBandwidthEfficiency.......................... 38
2.9 ChapterSummaryandConclusion ....................... 39

3 OFDM Transmission over Gaussian Channels 41
3.1 Orthogonal Frequency Division Multiplexing . . . . ............. 42
3.2 Choice of the OFDM Modulation ........................ 42
3.3 OFDMSystemPerformanceoverAWGNChannels.............. 42
3.4 ClippingAmplification............................. 43
3.4.1 OFDMSignalAmplitudeStatistics .................. 43
3.4.2 ClippingAmplifierSimulations .................... 44
3.4.2.1 Introduction to Peak-Power Reduction Techniques ..... 45
3.4.2.2 BERPerformanceUsingClippingAmplifiers ....... 46
3.4.2.3 SignalSpectrumwithClippingAmplifier.......... 47
3.4.3 ClippingAmplification–Summary .................. 50
3.5 Analogue-to-Digital Conversion ........................ 50
3.6 PhaseNoise................................... 53
3.6.1 EffectsofPhaseNoise ......................... 53
3.6.2 PhaseNoiseSimulations........................ 54
3.6.2.1 WhitePhaseNoiseModel.................. 54
3.6.2.1.1 SerialModem................... 55
3.6.2.1.2 OFDMModem .................. 55
3.6.2.2 ColouredPhaseNoiseModel ................ 57
3.6.3 PhaseNoise–Summary ........................ 60
3.7 ChapterSummaryandConclusion ....................... 60

4 OFDM Transmission overWideband Channels 61
4.1 TheChannelModel............................... 61
4.1.1 The Wireless Asynchronous Transfer Mode System . ......... 62
4.1.1.1 TheWATMChannel..................... 62
4.1.1.2 TheShortenedWATMChannel............... 64
4.1.2 TheWirelessLocalAreaNetwork................... 64
4.1.2.1 TheWLANChannel..................... 65
4.1.3 UMTSSystem ............................. 65
4.1.3.1 TheUMTSTypeChannel.................. 65
4.2 EffectsofTime-DispersiveChannelsonOFDM................ 66
4.2.1 EffectsoftheStationaryTime-DispersiveChannel .......... 67
4.2.2 Non-StationaryChannel ........................ 68
4.2.2.1 SummaryofTime-VariantChannels ............ 70
4.2.3 Signalling over Time-Dispersive OFDM Channels . ......... 70
4.3 ChannelTransferFunctionEstimation..................... 70
4.3.1 FrequencyDomainChannelTransferFunctionEstimation ...... 70
4.3.1.1 PilotSymbol-AssistedSchemes............... 71
4.3.1.1.1 LinearInterpolationforPSAM.......... 71
4.3.1.1.2 IdealLowpassInterpolationforPSAM...... 73
4.3.1.1.3 Summary ..................... 75
4.3.2 TimeDomainChannelEstimation................... 78
4.4 SystemPerformance .............................. 78
4.4.1 StaticTime-DispersiveChannel .................... 78
4.4.1.1 PerfectChannelEstimation ................. 78
4.4.1.2 Differentially Coded Modulation .............. 81
4.4.1.3 PSAM Aided Channel Transfer Function Estimation . . . . 83
4.4.2 SlowlyVaryingTime-DispersiveChannel............... 88
4.4.2.1 PerfectChannelEstimation ................. 89
4.4.2.2 Pilot Symbol-Assisted Modulation Summary . . ...... 90
4.5 IntersubcarrierInterferenceCancellation.................... 90
4.5.1 Motivation ............................... 90
4.5.2 TheSignalModel............................ 94
4.5.3 ChannelEstimation........................... 96
4.5.4 CancellationSchemes ......................... 97
4.5.5 ICICancellationPerformance ..................... 99
4.5.6 ConclusionsonICICancellation....................100
4.6 ChapterSummaryandConclusion .......................101
5 OFDMTime and Frequency Domain Synchronisation 103
5.1 SystemPerformancewithFrequencyandTimingErrors............103
5.1.1 FrequencyShift.............................103
5.1.1.1 TheSpectrumoftheOFDMSignal.............104
5.1.1.2 Effects of Frequency Mismatch on Different Modulation
Schemes...........................108
5.1.1.2.1 Coherent Modulation . ..............108
5.1.1.2.2 Pilot Symbol Assisted Modulation . . ......108
5.1.1.2.3 Differential Modulation ..............109
5.1.1.2.4 FrequencyError-Summary ...........109
5.1.2 TimeDomainSynchronisationErrors .................110
5.1.2.1 Coherent Demodulation . . . . . ..............110
5.1.2.2 Pilot Symbol-Assisted Modulation . . . ..........111
5.1.2.3 Differential Modulation . . . . . ..............112
5.1.2.3.1 Time Domain Synchronisation Errors - Summary 114
5.2 SynchronisationAlgorithms ..........................114
5.2.1 Coarse Frame and OFDM Symbol Synchronisation Review . . . . . 115
5.2.2 FineSymbolTrackingReview.....................116
5.2.3 Frequency Acquisition Review .....................116
5.2.4 FrequencyTrackingReview ......................116
5.2.5 SynchronisationbasedonAuto-Correlation..............117
5.2.6 Multiple Access Frame Structure . . . . . . ..............117
5.2.6.1 TheReferenceSymbol ...................117
5.2.6.2 TheCorrelationFunctions..................119
5.2.7 FrequencyTrackingandOFDMSymbolSynchronisation.......120
5.2.7.1 OFDMSymbolSynchronisation ..............120
5.2.7.2 FrequencyTrackingStudies.................120
5.2.8 Frequency Acquisition and Frame Synchronisation Studies ......122
5.2.8.1 FrameSynchronisationStudies ...............122
5.2.8.2 Frequency Acquisition Studies . ..............122
5.2.8.3 Block Diagram of the Synchronisation Algorithms . . . . . 122
5.2.9 Frequency Acquisition Using Pilots . . . . ..............123
5.2.9.1 TheReferenceSymbol ...................124
5.2.9.2 Frequency Acquisition ....................124
5.2.9.3 Performance of the Pilot-Based Frequency Acquisition in
AWGNChannels ......................126
5.2.9.4 Alternative Frequency Error Estimation for Frequency Do-
mainPilotTones.......................131
5.3 Comparison of the Frequency Acquisition Algorithms .............133
5.4 BERPerformancewithFrequencySynchronisation..............137
5.5 ChapterSummaryandConclusion .......................138
5.6 Appendix:OFDMSynchronisationPerformance ...............139
5.6.1 FrequencySynchronisationinanAWGNChannel ..........139
5.6.1.1 OnePhasorinAWGNEnvironment.............139
5.6.1.1.1 CartesianCoordinates...............139
5.6.1.1.2 PolarCoordinates.................139
5.6.1.2 Product of Two Noisy Phasors . . .............140
5.6.1.2.1 Joint Probability Density .............140
5.6.1.2.2 PhaseDistribution.................141
5.6.1.2.3 NumericalIntegration...............141

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