test.mdl

一个连续信号进行FFT分析先要进行离散化.这个实例便是一个简单的对连续信号的采样并数字化.从而可以获得其FFT频谱

	      ERTCustomFileBanners    off
	      SupportAbsoluteTime     on
	      LogVarNameModifier      "rt_"
	      MatFileLogging	      on
	      MultiInstanceERTCode    off
	      SupportNonFinite	      on
	      SupportComplex	      on
	      PurelyIntegerCode	      off
	      SupportContinuousTime   on
	      SupportNonInlinedSFcns  on
	      ExtMode		      off
	      ExtModeStaticAlloc      off
	      ExtModeTesting	      off
	      ExtModeStaticAllocSize  1000000
	      ExtModeTransport	      0
	      ExtModeMexFile	      "ext_comm"
	      RTWCAPISignals	      off
	      RTWCAPIParams	      off
	      RTWCAPIStates	      off
	      GenerateASAP2	      off
	    }
	    PropName		    "Components"
	  }
	}
	PropName		"Components"
      }
      Name		      "Configuration"
      SimulationMode	      "normal"
      CurrentDlgPage	      "Solver"
    }
    PropName		    "ConfigurationSets"
  }
  Simulink.ConfigSet {
    $PropName		    "ActiveConfigurationSet"
    $ObjectID		    1
  }
  BlockDefaults {
    Orientation		    "right"
    ForegroundColor	    "black"
    BackgroundColor	    "white"
    DropShadow		    off
    NamePlacement	    "normal"
    FontName		    "Helvetica"
    FontSize		    10
    FontWeight		    "normal"
    FontAngle		    "normal"
    ShowName		    on
  }
  BlockParameterDefaults {
    Block {
      BlockType		      Clock
      DisplayTime	      off
    }
    Block {
      BlockType		      Constant
      Value		      "1"
      VectorParams1D	      on
      OutDataTypeMode	      "Inherit from 'Constant value'"
      OutDataType	      "sfix(16)"
      ConRadixGroup	      "Use specified scaling"
      OutScaling	      "2^0"
      SampleTime	      "inf"
    }
    Block {
      BlockType		      DataTypeConversion
      OutDataTypeMode	      "Inherit via back propagation"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      ConvertRealWorld	      "Real World Value (RWV)"
      RndMeth		      "Zero"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      DiscretePulseGenerator
      PulseType		      "Sample based"
      TimeSource	      "Use simulation time"
      Amplitude		      "1"
      Period		      "2"
      PulseWidth	      "1"
      PhaseDelay	      "0"
      SampleTime	      "1"
      VectorParams1D	      on
    }
    Block {
      BlockType		      Gain
      Gain		      "1"
      Multiplication	      "Element-wise(K.*u)"
      ParameterDataTypeMode   "Same as input"
      ParameterDataType	      "sfix(16)"
      ParameterScalingMode    "Best Precision: Matrix-wise"
      ParameterScaling	      "2^0"
      OutDataTypeMode	      "Same as input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      Inport
      BusObject		      "BusObject"
      BusOutputAsStruct	      off
      PortDimensions	      "-1"
      SampleTime	      "-1"
      DataType		      "auto"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      SignalType	      "auto"
      SamplingMode	      "auto"
      Interpolate	      on
    }
    Block {
      BlockType		      Math
      Operator		      "exp"
      OutputSignalType	      "auto"
      SampleTime	      "-1"
      OutDataTypeMode	      "Same as first input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	on
    }
    Block {
      BlockType		      "M-S-Function"
      MFile		      "mlfile"
    }
    Block {
      BlockType		      Outport
      Port		      "1"
      BusObject		      "BusObject"
      BusOutputAsStruct	      off
      PortDimensions	      "-1"
      SampleTime	      "-1"
      DataType		      "auto"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      SignalType	      "auto"
      SamplingMode	      "auto"
      OutputWhenDisabled      "held"
      InitialOutput	      "[]"
    }
    Block {
      BlockType		      Product
      Inputs		      "2"
      Multiplication	      "Element-wise(.*)"
      InputSameDT	      on
      OutDataTypeMode	      "Same as first input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Zero"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      Quantizer
      QuantizationInterval    "0.5"
      LinearizeAsGain	      on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      "S-Function"
      FunctionName	      "system"
      PortCounts	      "[]"
      SFunctionModules	      "''"
    }
    Block {
      BlockType		      Sin
      SineType		      "Time based"
      TimeSource	      "Use simulation time"
      Amplitude		      "1"
      Bias		      "0"
      Frequency		      "1"
      Phase		      "0"
      Samples		      "10"
      Offset		      "0"
      SampleTime	      "-1"
      VectorParams1D	      on
    }
    Block {
      BlockType		      SubSystem
      ShowPortLabels	      on
      Permissions	      "ReadWrite"
      PermitHierarchicalResolution "All"
      SystemSampleTime	      "-1"
      RTWFcnNameOpts	      "Auto"
      RTWFileNameOpts	      "Auto"
      SimViewingDevice	      off
      DataTypeOverride	      "UseLocalSettings"
      MinMaxOverflowLogging   "UseLocalSettings"
    }
    Block {
      BlockType		      Sum
      IconShape		      "rectangular"
      Inputs		      "++"
      InputSameDT	      on
      OutDataTypeMode	      "Same as first input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      Trigonometry
      Operator		      "sin"
      OutputSignalType	      "auto"
      SampleTime	      "-1"
    }
    Block {
      BlockType		      ZeroOrderHold
      SampleTime	      "1"
    }
  }
  AnnotationDefaults {
    HorizontalAlignment	    "center"
    VerticalAlignment	    "middle"
    ForegroundColor	    "black"
    BackgroundColor	    "white"
    DropShadow		    off
    FontName		    "Helvetica"
    FontSize		    10
    FontWeight		    "normal"
    FontAngle		    "normal"
  }
  LineDefaults {
    FontName		    "Helvetica"
    FontSize		    9
    FontWeight		    "normal"
    FontAngle		    "normal"
  }
  System {
    Name		    "test"
    Location		    [131, 332, 679, 711]
    Open		    on
    ModelBrowserVisibility  off
    ModelBrowserWidth	    200
    ScreenColor		    "white"
    PaperOrientation	    "landscape"
    PaperPositionMode	    "auto"
    PaperType		    "A4"
    PaperUnits		    "centimeters"
    ZoomFactor		    "100"
    ReportName		    "simulink-default.rpt"
    Block {
      BlockType		      Reference
      Name		      "Chirp Signal"
      Ports		      [0, 1]
      Position		      [130, 155, 160, 185]
      SourceBlock	      "simulink/Sources/Chirp Signal"
      SourceType	      "chirp"
      ShowPortLabels	      on
      f1		      "1"
      T			      "100"
      f2		      "100"
      VectorParams1D	      on
    }
    Block {
      BlockType		      Gain
      Name		      "Gain"
      Position		      [235, 225, 265, 255]
      Gain		      "100"
      ParameterDataTypeMode   "Inherit via internal rule"
      OutDataTypeMode	      "Inherit via internal rule"
      SaturateOnIntegerOverflow	off
    }
    Block {
      BlockType		      DiscretePulseGenerator
      Name		      "Pulse\nGenerator"
      Ports		      [0, 1]
      Position		      [125, 58, 170, 92]
      PulseType		      "Time based"
      PulseWidth	      "50"
    }
    Block {
      BlockType		      Quantizer
      Name		      "Quantizer"
      Position		      [390, 220, 430, 260]
      QuantizationInterval    "0.001"
      LinearizeAsGain	      off
    }
    Block {
      BlockType		      Sin
      Name		      "Sine Wave"
      Ports		      [0, 1]
      Position		      [135, 230, 165, 260]
      SineType		      "Time based"
      Amplitude		      "40"
      Frequency		      "2*pi*100"
      SampleTime	      "0"
    }
    Block {
      BlockType		      Reference
      Name		      "Spectrum\nScope"
      Ports		      [1]
      Position		      [490, 215, 525, 265]
      SourceBlock	      "dspsnks4/Spectrum\nScope"
      SourceType	      "Spectrum Scope"
      ShowPortLabels	      off
      ScopeProperties	      on
      Domain		      "Frequency"
      HorizSpan		      "1"
      UseBuffer		      on
      BufferSize	      "128"
      Overlap		      "64"
      inpFftLenInherit	      off
      FFTlength		      "64"
      numAvg		      "2"
      DisplayProperties	      off
      AxisGrid		      on
      Memory		      off
      FrameNumber	      on
      AxisLegend	      off
      AxisZoom		      off
      OpenScopeAtSimStart     on
      OpenScopeImmediately    off
      FigPos		      "get(0,'defaultfigureposition')"
      AxisProperties	      off
      XUnits		      "Hertz"
      XRange		      "[0...Fs/2]"
      InheritXIncr	      on
      XIncr		      "1.0"
      XLabel		      "Samples"
      YUnits		      "dB"
      YMin		      "-92.7321425443479"
      YMax		      "60.5661999779112"
      YLabel		      "Magnitude, dB"
      LineProperties	      off
      LineMarkers	      "stem"
    }
    Block {
      BlockType		      ZeroOrderHold
      Name		      "Zero-Order\nHold1"
      Position		      [325, 225, 360, 255]
      SampleTime	      "1/1000"
    }
    Line {
      SrcBlock		      "Zero-Order\nHold1"
      SrcPort		      1
      DstBlock		      "Quantizer"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Quantizer"
      SrcPort		      1
      DstBlock		      "Spectrum\nScope"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Gain"
      SrcPort		      1
      DstBlock		      "Zero-Order\nHold1"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Pulse\nGenerator"
      SrcPort		      1
      Points		      [20, 0; 0, 165]
      DstBlock		      "Gain"
      DstPort		      1
    }
  }
}