Block {
	  BlockType		  Gain
	  Name			  "Gain"
	  Position		  [200, 55, 240, 85]
	  Gain			  "Kc"
	}
	Block {
	  BlockType		  Constant
	  Name			  "Gain diff"
	  Position		  [200, 126, 235, 154]
	  Value			  "Ac"
	}
	Block {
	  BlockType		  Sum
	  Name			  "Sum1"
	  Ports			  [2, 1]
	  Position		  [270, 93, 290, 117]
	  Inputs		  "+-"
	}
	Block {
	  BlockType		  ZeroOrderHold
	  Name			  "Zero-Order\nHold"
	  Position		  [120, 54, 155, 86]
	  SampleTime		  "td"
	}
	Block {
	  BlockType		  Outport
	  Name			  "out_1"
	  Position		  [335, 95, 355, 115]
	}
	Line {
	  SrcBlock		  "Gain"
	  SrcPort		  1
	  Points		  [5, 0; 0, 30]
	  DstBlock		  "Sum1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Gain diff"
	  SrcPort		  1
	  Points		  [10, 0; 0, -30]
	  DstBlock		  "Sum1"
	  DstPort		  2
	}
	Line {
	  SrcBlock		  "Sum1"
	  SrcPort		  1
	  DstBlock		  "out_1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "in_1"
	  SrcPort		  1
	  DstBlock		  "Zero-Order\nHold"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Zero-Order\nHold"
	  SrcPort		  1
	  DstBlock		  "Gain"
	  DstPort		  1
	}
      }
    }
    Block {
      BlockType		      SubSystem
      Name		      "4-ASK demap"
      Ports		      [1, 1]
      Position		      [870, 109, 940, 151]
      TreatAsAtomicUnit	      off
      MaskType		      "MASK demapping"
      MaskDescription	      "Reverse the MASK mapping process\nConvert [-1 1"
"] analog signal to [0, M-1] symbols."
      MaskHelp		      "This block demaps a MASK mapped signal back to "
"digit symbols. You can place this block after a amplitude demodulation block."
" The input of this block is an analog signal in the range [-1, 1]. The demodu"
"lation decides the closest integer fitting in [0,M-1] range. When the input s"
"ymbol interval is a two-elements vector, the second element is offset. The de"
"fault offset value is 0."
      MaskPromptString	      "M-ary number (digit integers in ranger [0, M-1]"
"):|Output symbol interval and offset (sec):"
      MaskStyleString	      "edit,edit"
      MaskTunableValueString  "on,on"
      MaskCallbackString      "|"
      MaskEnableString	      "on,on"
      MaskVisibilityString    "on,on"
      MaskToolTipString	      "on,on"
      MaskVarAliasString      ","
      MaskVariables	      "N=@1;td=@2;"
      MaskInitialization      "Ac=1;sft=[0:N-1]*Ac*2/(N-1)-Ac;"
      MaskDisplay	      "disp('MASK\\ndemapping')"
      MaskIconFrame	      on
      MaskIconOpaque	      on
      MaskIconRotate	      "none"
      MaskIconUnits	      "autoscale"
      MaskValueString	      "4|[1, .9]"
      System {
	Name			"4-ASK demap"
	Location		[617, 158, 1115, 458]
	Open			off
	ModelBrowserVisibility	off
	ModelBrowserWidth	200
	ScreenColor		"white"
	PaperOrientation	"landscape"
	PaperPositionMode	"auto"
	PaperType		"usletter"
	PaperUnits		"inches"
	ZoomFactor		"100"
	Block {
	  BlockType		  Inport
	  Name			  "in_1"
	  Position		  [40, 30, 60, 50]
	}
	Block {
	  BlockType		  Abs
	  Name			  "Abs"
	  Position		  [245, 37, 280, 63]
	}
	Block {
	  BlockType		  "S-Function"
	  Name			  "Minimum"
	  Ports			  [1, 1]
	  Position		  [325, 40, 380, 60]
	  FunctionName		  "arymimai"
	  Parameters		  "'min'"
	}
	Block {
	  BlockType		  Constant
	  Name			  "Shift key"
	  Position		  [125, 88, 145, 112]
	  Value			  "sft"
	}
	Block {
	  BlockType		  Sum
	  Name			  "Sum2"
	  Ports			  [2, 1]
	  Position		  [190, 33, 210, 62]
	  Inputs		  "+-"
	}
	Block {
	  BlockType		  ZeroOrderHold
	  Name			  "Zero-Order\nHold"
	  Position		  [95, 24, 130, 56]
	  SampleTime		  "td"
	}
	Block {
	  BlockType		  Outport
	  Name			  "out_1"
	  Position		  [410, 40, 430, 60]
	}
	Line {
	  SrcBlock		  "in_1"
	  SrcPort		  1
	  DstBlock		  "Zero-Order\nHold"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Abs"
	  SrcPort		  1
	  DstBlock		  "Minimum"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Zero-Order\nHold"
	  SrcPort		  1
	  DstBlock		  "Sum2"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Minimum"
	  SrcPort		  1
	  DstBlock		  "out_1"
	  DstPort		  1
	}
	Line {
	  SrcBlock		  "Shift key"
	  SrcPort		  1
	  Points		  [15, 0; 0, -45]
	  DstBlock		  "Sum2"
	  DstPort		  2
	}
	Line {
	  SrcBlock		  "Sum2"
	  SrcPort		  1
	  DstBlock		  "Abs"
	  DstPort		  1
	}
      }
    }
    Block {
      BlockType		      SubSystem
      Name		      "4-ary source"
      Ports		      [0, 2]
      Position		      [35, 101, 65, 154]
      ShowPortLabels	      off
      TreatAsAtomicUnit	      off
      System {
	Name			"4-ary source"
	Location		[84, 535, 621, 774]
	Open			off
	ModelBrowserVisibility	off
	ModelBrowserWidth	200
	ScreenColor		"white"
	PaperOrientation	"landscape"
	PaperPositionMode	"auto"
	PaperType		"usletter"
	PaperUnits		"inches"
	ZoomFactor		"100"
	Block {
	  BlockType		  SubSystem
	  Name			  "Bits"
	  Ports			  [0, 1]
	  Position		  [25, 48, 85, 92]
	  ShowPortLabels	  off
	  TreatAsAtomicUnit	  off
	  MaskType		  "Read from workspace"
	  MaskDescription	  "Read from a workspace variable at\nsampling"
" time point."
	  MaskHelp		  "This block reads from a workspace variable "
"at a given sample time. The column number is the block output vector length. "
"When the simulation reaches the end of the variable (eof), the block will cyc"
"lically output from the first row of the variable or output zeros based on th"
"e repeat flag entree."
	  MaskPromptString	  "Variable (column_number=block_output_length"
"):|Data output sample time (sec):|Repeat flag (1: repeat read, 0: output zero"
"s after eof).|Initial output:"
	  MaskStyleString	  "edit,edit,edit,edit"
	  MaskTunableValueString  "on,on,on,on"
	  MaskCallbackString	  "|||"
	  MaskEnableString	  "on,on,on,on"
	  MaskVisibilityString	  "on,on,on,on"
	  MaskToolTipString	  "on,on,on,on"
	  MaskVarAliasString	  ",,,"
	  MaskInitialization	  "var=@1;td=@2;ts=td(1);if (length(td)>=2),of"
"f=td(2);else off=0;end;cyc=@3;ini=@4;[x,y]=srcsicon(7);"
	  MaskDisplay		  "plot(0,0,100,100,x,y);disp('Rd wksp')"
	  MaskIconFrame		  on
	  MaskIconOpaque	  on
	  MaskIconRotate	  "none"
	  MaskIconUnits		  "autoscale"
	  MaskValueString	  "randint(2000,1,2)|.5|1|1"
	  System {
	    Name		    "Bits"
	    Location		    [355, 528, 737, 675]
	    Open		    off
	    ModelBrowserVisibility  off
	    ModelBrowserWidth	    200
	    ScreenColor		    "white"
	    PaperOrientation	    "landscape"
	    PaperPositionMode	    "auto"
	    PaperType		    "usletter"
	    PaperUnits		    "inches"
	    ZoomFactor		    "100"
	    Block {
	      BlockType		      "S-Function"
	      Name		      "Message source"
	      Ports		      [1, 1]
	      Position		      [180, 53, 255, 97]
	      BackgroundColor	      "yellow"
	      FunctionName	      "trigwksp"
	      Parameters	      "var,thd,cyclFlag,ini"
	      MaskType		      "Read from workspace"
	      MaskDescription	      "The raising edge of input pulse trigger"
" the block output the next row from the workspace variable."
	      MaskHelp		      "This block reads the data from a worksp"
"ace variable. The output is refreshed at the raising edge of the input pulse."
	      MaskPromptString	      "Read the variable:|Threshold for the in"
"put pulse:|Cyclic read variable (1) or amend zeros (0).|Output before first t"
"rigger:"
	      MaskStyleString	      "edit,edit,edit,edit"
	      MaskTunableValueString  "on,on,on,on"
	      MaskCallbackString      "|||"
	      MaskEnableString	      "on,on,on,on"
	      MaskVisibilityString    "on,on,on,on"
	      MaskToolTipString	      "on,on,on,on"
	      MaskVarAliasString      ",,,"
	      MaskInitialization      "var=@1;thd=@2;cyclFlag=@3;ini=@4;"
	      MaskDisplay	      "disp('Triggered\\nread')"
	      MaskIconFrame	      on
	      MaskIconOpaque	      on
	      MaskIconRotate	      "none"
	      MaskIconUnits	      "autoscale"
	      MaskValueString	      "var|.1|cyc|ini"
	    }
	    Block {
	      BlockType		      SubSystem
	      Name		      "Pulses deivide\nsame sample time1"
	      Ports		      [0, 1]
	      Position		      [50, 56, 110, 94]
	      ShowPortLabels	      off
	      TreatAsAtomicUnit	      off
	      MaskType		      "Pulse generator"
	      MaskDescription	      "Vector pulses with sample rate of each "
"pulse as Sample_time ./Divider. "
	      MaskHelp		      "This block generator a vector pulses. T"
"he output length is the same as the vector defined in \"Divider\". The ith el"
"ement of the output has the sample time Sample_time/Divider(i). All elements "
"in \"Divider\" must be integers."
	      MaskPromptString	      "Sample time (scalar, sec):|Divider (int"
"eger vector):|Offset (have same dimension as Divider:"
	      MaskStyleString	      "edit,edit,edit"
	      MaskTunableValueString  "on,on,on"
	      MaskCallbackString      "||"
	      MaskEnableString	      "on,on,on"
	      MaskVisibilityString    "on,on,on"
	      MaskToolTipString	      "on,on,on"
	      MaskVarAliasString      ",,"
	      MaskInitialization      "samp_time=@1;out_divid=@2;offset=@3;"
	      MaskDisplay	      "disp('Vector\\nPulse')"
	      MaskIconFrame	      on
	      MaskIconOpaque	      on
	      MaskIconRotate	      "none"
	      MaskIconUnits	      "autoscale"
	      MaskValueString	      "ts|1|off"
	      System {
		Name			"Pulses deivide\nsame sample time1"
		Location		[55, 192, 283, 286]
		Open			off
		ModelBrowserVisibility	off
		ModelBrowserWidth	200
		ScreenColor		"white"
		PaperOrientation	"landscape"
		PaperPositionMode	"auto"
		PaperType		"usletter"
		PaperUnits		"inches"
		ZoomFactor		"100"
		Block {
		  BlockType		  "S-Function"
		  Name			  "S-function1"
		  Ports			  [0, 1]
		  Position		  [40, 31, 105, 59]
		  FunctionName		  "homopuls"
		  Parameters		  "samp_time, out_divid, offset"
		}
		Block {
		  BlockType		  Outport
		  Name			  "Outport"
		  Position		  [160, 35, 180, 55]
		}
		Line {
		  SrcBlock		  "S-function1"
		  SrcPort		  1
		  DstBlock		  "Outport"
		  DstPort		  1
		}
	      }
	    }
	    Block {
	      BlockType		      Outport
	      Name		      "out_1"
	      Position		      [295, 65, 315, 85]
	    }
	    Line {
	      SrcBlock		      "Pulses deivide\nsame sample time1"
	      SrcPort		      1
	      DstBlock		      "Message source"
	      DstPort		      1
	    }
	    Line {
	      SrcBlock		      "Message source"
	      SrcPort		      1
	      DstBlock		      "out_1"
	      DstPort		      1
	    }
	  }
	}
	Block {
	  BlockType		  "S-Function"
	  Name			  "D/A "
	  Ports			  [1, 1]
	  Position		  [370, 128, 450, 172]
	  FunctionName		  "simbi2de"
	  Parameters		  "p"
	  MaskType		  "Base M vector to decimal integer"
	  MaskDescription	  "Convert base M integer with each\nposition "
"in the input vector into scalar decimal output."
	  MaskHelp		  "This block convert the base M vector into s"
"calar decimal integer output. Each element of the input vector is one positio"
"n of the digit of the base M integer. The 1st element in the input vector con"
"tains the 1's position. The 2nd element in the input vector contains the M's "
"position."
	  MaskPromptString	  "Input integer base M:"
	  MaskStyleString	  "edit"
	  MaskTunableValueString  "on"
	  MaskEnableString	  "on"
	  MaskVisibilityString	  "on"
	  MaskToolTipString	  "on"
	  MaskInitialization	  "p=@1;"
	  MaskDisplay		  "disp('Vec to sca\\nconverter')"
	  MaskIconFrame		  on
	  MaskIconOpaque	  on
	  MaskIconRotate	  "none"
	  MaskIconUnits		  "autoscale"
	  MaskValueString	  "2"
	}
	Block {
	  BlockType		  SubSystem
	  Name			  "Shift register"
	  Ports			  [2, 2]
	  Position		  [120, 133, 200, 177]
	  ShowPortLabels	  off
	  TreatAsAtomicUnit	  off
	  MaskType		  "Register-shift"
	  MaskDescription	  "The rising edge of the 2nd port pulse\ntrig"
"gers the block to input the 1st port data and to shift the register."
	  MaskHelp		  "This block stores the scalar input signal f"
"rom the 1st input port at the rising edge of the pulse from the 2nd port. The"
" 1st outport outputs a vector with its size the same as the \"Delay steps\" e"
"ntree of this block. The maximum delay is the register size of this block. Th"
"e second outport outputs a positive pulse when the register is\\nrefreshed."
	  MaskPromptString	  "Delay steps (output length is same as this "
"vector size):|Threshold in detecting the rising edge of the pulse:"
	  MaskStyleString	  "edit,edit"
	  MaskTunableValueString  "on,on"
	  MaskCallbackString	  "|"
	  MaskEnableString	  "on,on"
	  MaskVisibilityString	  "on,on"
	  MaskToolTipString	  "on,on"
	  MaskVarAliasString	  ","
	  MaskInitialization	  "shft_out=@1;thrhld=@2;len_rg=length(@1);[v,"
"w]=trigicon(0,25,get_param(gcb,'orientation'),2);[x,y]=trigicon(1,75,get_para"
"m(gcb,'orientation'),2);"
	  MaskDisplay		  "plot(0,0,100,100,x,y,v,w);disp('Reg. shift'"
")"
	  MaskIconFrame		  on
	  MaskIconOpaque	  on
	  MaskIconRotate	  "none"
	  MaskIconUnits		  "autoscale"
	  MaskValueString	  "[2 1]|1"
	  System {
	    Name		    "Shift register"
	    Location		    [19, 610, 374, 740]
	    Open		    off
	    ModelBrowserVisibility  off
	    ModelBrowserWidth	    200
	    ScreenColor		    "white"
	    PaperOrientation	    "landscape"
	    PaperPositionMode	    "auto"
	    PaperType		    "usletter"
	    PaperUnits		    "inches"
	    ZoomFactor		    "100"
	    Block {
	      BlockType		      Inport
	      Name		      "in_1"
	      Position		      [30, 55, 50, 75]
	    }
	    Block {
	      BlockType		      Inport
	      Name		      "in_2"
	      Position		      [30, 70, 50, 90]
	      Port		      "2"
	    }
	    Block {
	      BlockType		      Demux