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📄 ofdm.mdl

📁 Experiments on effects of synchonization errors in OFDM receivers
💻 MDL
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	  SourceType		  "Kasami Sequence Generator"
	  genPoly		  "[1 0 0 0 0  0 0 1 1]"
	  iniState		  "[0 0 0 0 0 0 0  1]"
	  codeIdx		  "1"
	  shift			  "0"
	  ts			  "4e-6/8"
	  frameBased		  on
	  sampPerFrame		  "2"
	  reset			  off
	}
	Block {
	  BlockType		  Reference
	  Name			  "Matrix\nConcatenation1"
	  Ports			  [11, 1]
	  Position		  [655, 176, 710, 474]
	  SourceBlock		  "simulink/Math\nOperations/Matrix\nConcatena"
"tion"
	  SourceType		  "Matrix Concatenation"
	  numInports		  "11"
	  catMethod		  "Vertical"
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	  BlockType		  Reference
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	  Ports			  [1, 6]
	  Position		  [405, 179, 470, 471]
	  SourceBlock		  "dspindex/Multiport\nSelector"
	  SourceType		  "Multiport Selector"
	  rowsOrCols		  "Rows"
	  idxCellArray		  "{1:5,6:18,19:24,25:30,31:43,44:48}"
	  idxErrMode		  "Clip Index"
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	Block {
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	  Position		  [475, 52, 520, 128]
	  SourceBlock		  "dspindex/Multiport\nSelector"
	  SourceType		  "Multiport Selector"
	  rowsOrCols		  "Rows"
	  idxCellArray		  "{1 2 3 4}"
	  idxErrMode		  "Clip Index"
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	Block {
	  BlockType		  Reference
	  Name			  "QPSK\nModulator\nBaseband"
	  Ports			  [1, 1]
	  Position		  [290, 65, 330, 115]
	  NamePlacement		  "alternate"
	  SourceBlock		  "commdigbbndpm2/QPSK\nModulator\nBaseband"
	  SourceType		  "QPSK Modulator Baseband"
	  ShowPortLabels	  on
	  InType		  "Bit"
	  Enc			  "Gray"
	  Ph			  "pi/4"
	  numSamp		  "1"
	}
	Block {
	  BlockType		  SubSystem
	  Name			  "Zero pad for OFDM"
	  Ports			  [1, 1]
	  Position		  [770, 300, 825, 350]
	  TreatAsAtomicUnit	  off
	  MinAlgLoopOccurrences	  off
	  RTWSystemCode		  "Auto"
	  MaskDisplay		  "disp('Zero pad\\nfor OFDM');"
	  MaskIconFrame		  on
	  MaskIconOpaque	  on
	  MaskIconRotate	  "none"
	  MaskIconUnits		  "autoscale"
	  System {
	    Name		    "Zero pad for OFDM"
	    Location		    [191, 421, 703, 556]
	    Open		    off
	    ModelBrowserVisibility  off
	    ModelBrowserWidth	    200
	    ScreenColor		    "white"
	    PaperOrientation	    "landscape"
	    PaperPositionMode	    "auto"
	    PaperType		    "usletter"
	    PaperUnits		    "inches"
	    ZoomFactor		    "100"
	    Block {
	      BlockType		      Inport
	      Name		      "In1"
	      Position		      [30, 53, 60, 67]
	      Port		      "1"
	      IconDisplay	      "Port number"
	      LatchInput	      off
	    }
	    Block {
	      BlockType		      Selector
	      Name		      "Selector"
	      Ports		      [1, 1]
	      Position		      [230, 38, 280, 82]
	      Elements		      "[27:64 1:26]"
	      InputPortWidth	      "64"
	    }
	    Block {
	      BlockType		      Reference
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	      Ports		      [1, 1]
	      Position		      [120, 42, 165, 78]
	      SourceBlock	      "dspsigops/Zero Pad"
	      SourceType	      "Zero Pad"
	      padSigAt		      "End"
	      zpadAlong		      "Columns"
	      padNumOutRowsSpecMethod "User-specified"
	      numOutRows	      "64"
	      padNumOutColsSpecMethod "User-specified"
	      numOutCols	      "1"
	      trunc_flag	      "None"
	    }
	    Block {
	      BlockType		      Outport
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	      SrcPort		      1
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	      SrcBlock		      "Zero Pad"
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	    }
	    Line {
	      SrcBlock		      "In1"
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	      DstBlock		      "Zero Pad"
	      DstPort		      1
	    }
	  }
	}
	Block {
	  BlockType		  Outport
	  Name			  "Out"
	  Position		  [1070, 318, 1100, 332]
	  IconDisplay		  "Port number"
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	Line {
	  SrcBlock		  "Zero pad for OFDM"
	  SrcPort		  1
	  DstBlock		  "IFFT"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "IFFT"
	  SrcPort		  1
	  DstBlock		  "Add Cyclic\nPrefix"
	  DstPort		  1
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	  SrcBlock		  "Add Cyclic\nPrefix"
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	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Matrix\nConcatenation1"
	  SrcPort		  1
	  DstBlock		  "Zero pad for OFDM"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "In"
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	  DstBlock		  "Multiport\nSelector1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Kasami\nSequence\nGenerator"
	  SrcPort		  1
	  DstBlock		  "Frame Status\nConversion"
	  DstPort		  1
	}
	Line {
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	  SrcPort		  1
	  DstBlock		  "QPSK\nModulator\nBaseband"
	  DstPort		  1
	}
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	  SrcPort		  1
	  DstBlock		  "Buffer"
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	  Points		  [55, 0; 0, 165]
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	  DstPort		  11
	}
	Annotation {
	  Name			  "Based on HIPERLAN 2 Simulink\nCommunication"
"s Blockset Demo"
	  Position		  [951, 146]
	}
      }
    }
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      BlockType		      Reference
      Name		      "QPSK\nModulator\nBaseband"
      Ports		      [1, 1]
      Position		      [280, 41, 350, 89]
      SourceBlock	      "commdigbbndpm2/QPSK\nModulator\nBaseband"
      SourceType	      "QPSK Modulator Baseband"
      ShowPortLabels	      on
      InType		      "Bit"
      Enc		      "Gray"
      Ph		      "pi/4"
      numSamp		      "1"
    }
    Block {
      BlockType		      Reference
      Name		      "Received Signal"
      Tag		      "ScatterPlot"
      Ports		      [1]
      Position		      [120, 305, 170, 355]
      Orientation	      "left"
      NamePlacement	      "alternate"
      SourceBlock	      "commsink2/Discrete-Time\nScatter Plot\nScope"
      SourceType	      "Discrete-Time Scatter Plot Scope"
      ShowPortLabels	      on
      sampPerSymb	      "1"
      offsetEye		      "0"
      numTraces		      "300"
      numNewFrames	      "80"
      LineMarkers	      "."
      LineColors	      "r"
      fading		      on
      render		      off
      AxisGrid		      on
      xMin		      "-2"
      xMax		      "2"
      yMin		      "-2"
      yMax		      "2"
      inphaseLabel	      "In-phase Amplitude"
      quadratureLabel	      "Quadrature Amplitude"
      openScopeAtSimStart     on
      FrameNumber	      off
      FigPos		      "[188 537 432 432]"
      figTitle		      "Scatter Plot"
      numLinesMax	      "8"
      block_type_	      "scatter"
    }
    Block {
      BlockType		      ZeroOrderHold
      Name		      "Receiver clock\nsampling error"
      Position		      [470, 311, 495, 349]
      Orientation	      "left"
      NamePlacement	      "alternate"
      FontName		      "Arial"
      SampleTime	      "(1+e)*4e-6/80"
    }
    Block {
      BlockType		      Reference
      Name		      "Spectrum"
      Ports		      [1]
      Position		      [265, 385, 305, 435]
      Orientation	      "left"
      SourceBlock	      "dspsnks4/Spectrum\nScope"
      SourceType	      "Spectrum Scope"
      ShowPortLabels	      off
      ScopeProperties	      off
      Domain		      "Frequency"
      HorizSpan		      "1"
      UseBuffer		      on
      BufferSize	      "80"
      Overlap		      "0"
      inpFftLenInherit	      on
      FFTlength		      "128"
      numAvg		      "40"
      DisplayProperties	      off
      AxisGrid		      on
      Memory		      off
      FrameNumber	      on
      AxisLegend	      off
      AxisZoom		      off
      OpenScopeAtSimStart     on
      OpenScopeImmediately    off
      FigPos		      "[627 537 478 432]"
      AxisProperties	      on
      XUnits		      "Hertz"
      XRange		      "[-Fs/2...Fs/2]"
      InheritXIncr	      on
      XIncr		      "4e-6/192"
      XLabel		      "Samples"
      YUnits		      "dB"
      YMin		      "-55"
      YMax		      "-10"
      YLabel		      "Magnitude, dB"
      LineProperties	      off
    }
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      Name		      "Static timing error \n(80 + integer)   "
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      Orientation	      "left"
      FontName		      "Arial"
      SourceBlock	      "dspobslib/Integer Delay"
      SourceType	      "Integer Delay"
      delay		      "80+dT"
      ic		      "0"
      reset_popup	      "None"
    }
    Block {
      BlockType		      ZeroOrderHold
      Name		      "Ts  "
      Position		      [687, 180, 723, 200]
      Orientation	      "down"
      NamePlacement	      "alternate"
      SampleTime	      "4e-6/80"
    }
    Line {
      SrcBlock		      "QPSK\nModulator\nBaseband"
      SrcPort		      1
      DstBlock		      "OFDM Transmitter"
      DstPort		      1
    }
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      Labels		      [1, 0]
      SrcBlock		      "Bernoulli Binary\nGenerator"
      SrcPort		      1
      DstBlock		      "QPSK\nModulator\nBaseband"
      DstPort		      1
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      SrcBlock		      "OFDM Transmitter"
      SrcPort		      1
      Points		      [175, 0]
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      SrcBlock		      "Ts  "
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      DstBlock		      "AWGN\nChannel"
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      SrcBlock		      "Static timing error \n(80 + integer)   "
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      SrcBlock		      "Receiver clock\nsampling error"
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      DstBlock		      "  "
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      SrcBlock		      "    "
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      DstBlock		      "Static timing error \n(80 + integer)   "
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      SrcBlock		      "  "
      SrcPort		      1
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	DstBlock		"OFDM Receiver"
	DstPort			1
      }
      Branch {
	Points			[0, 80]
	DstBlock		"Spectrum"
	DstPort			1
      }
    }
    Annotation {
      Name		      "EE 252 - Spring 2004\nSan Jose State University"
"\nMarch 2004"
      Position		      [329, 221]
      FontName		      "Arial"
      FontSize		      12
    }
    Annotation {
      Name		      "Illustrating the effects of synchronization \ne"
"rrors in OFDM with QPSK modulation"
      Position		      [330, 176]
      FontName		      "Arial"
      FontSize		      16
      FontWeight	      "bold"
    }
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      Name		      " "
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