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ID:58999048
大小:2.52 MB
页数:54页
时间:2020-09-27
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1、SoftwareRadio——LinearEqualizationMultipathandOtherInterferenceTrainedLeast-SquaresLinearEqualizationTrainedAdaptiveLeast-Mean-SquareEqualizationBlindAdaptiveDecision-DirectedEqualizationBlindAdaptiveDispersionMinimizingEqualizationLINEAREQUALIZATIONAssumeupanddownconversionandcarrierandcl
2、ockrecovery(includingmatchedfilteringanddownsampling)allexecutedtransparently.Impairmentofinterestismultipathinterference(linearfilteringbyanalogchannelandreceiverfront-endprecedingequalizer)andotheradditiveinterference(broadbandnoiseandnarrowbandinterferers).MultipathandOtherInterference
3、LinearEqualizationMultipathandOtherInterferenceMultipathandOtherInterferenceLinearEqualizationMultipathandOtherInterferenceMultipathandOtherInterferenceLinearEqualizationMultipathandOtherInterferenceOrdernofdiscrete-timeFIRchannelmodeldependentonphysicaldelayspreadofchannel.For4μsecdelays
4、preadby“physical”channel:T=0.04μsec→25Msymbols/sec→n=100T=0.4μsec→2.5Msymbols/sec→n=10T=4μsec→0.25Msymbols/sec→n=1MultipathandOtherInterferenceLinearEqualizationMultipathandOtherInterferenceMultipathFIRmodelcoefficientsdependonactualbaud-timingchoiceofclockrecoveryalgorithm,whichneednotma
5、tchtiminginnon-ISIsituation.MultipathandOtherInterferenceLinearEqualizationMultipathandOtherInterferenceMultipathandOtherInterferenceLinearEqualizationMultipathandOtherInterferenceObjective:Chooseimpulseresponsefofequalizersoy[k]≈s[k−δ](soe≈0)forsomeδ.TrainedLeast-SquaresLinearEqualizatio
6、nLinearEqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEqualizationLinearEqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEqualizationLinearEqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEqualizationLinear
7、EqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEqualizationLinearEqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEqualizationLinearEqualizationTrainedLeast-SquaresLinearEqualizationTrainedLeast-SquaresLinearEq
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