am_sys3.mdl

信号实验常用的simulink模型和mfile,可直接在matlan下运行。

      NumInputPorts	      "1"
      TickLabels	      "OneTimeTick"
      ZoomMode		      "on"
      List {
	ListType		AxesTitles
	axes1			"%<SignalLabel>"
      }
      Grid		      "on"
      TimeRange		      "1.000000"
      YMin		      "-1"
      YMax		      "1"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      DataFormat	      "Matrix"
      LimitMaxRows	      on
      MaxRows		      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
    }
    Block {
      BlockType		      Scope
      Name		      "上边带信号"
      Ports		      [1, 0, 0, 0, 0]
      Position		      [435, 100, 465, 130]
      ForegroundColor	      "green"
      FontName		      "宋体"
      FontSize		      12
      Floating		      off
      Location		      [66, 30, 397, 344]
      Open		      off
      NumInputPorts	      "1"
      TickLabels	      "OneTimeTick"
      ZoomMode		      "on"
      List {
	ListType		AxesTitles
	axes1			"%<SignalLabel>"
      }
      Grid		      "on"
      TimeRange		      "1.000000"
      YMin		      "-2"
      YMax		      "2"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      DataFormat	      "Matrix"
      LimitMaxRows	      on
      MaxRows		      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
    }
    Block {
      BlockType		      Scope
      Name		      "下边带信号"
      Ports		      [1, 0, 0, 0, 0]
      Position		      [435, 170, 465, 200]
      ForegroundColor	      "green"
      FontName		      "宋体"
      FontSize		      12
      Floating		      off
      Location		      [61, 154, 392, 468]
      Open		      off
      NumInputPorts	      "1"
      TickLabels	      "OneTimeTick"
      ZoomMode		      "on"
      List {
	ListType		AxesTitles
	axes1			"%<SignalLabel>"
      }
      Grid		      "on"
      TimeRange		      "1.000000"
      YMin		      "-2"
      YMax		      "2"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      DataFormat	      "Matrix"
      LimitMaxRows	      on
      MaxRows		      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
    }
    Block {
      BlockType		      SignalGenerator
      Name		      "信号发生器\n频率（弧度/秒）"
      Position		      [45, 93, 90, 127]
      ForegroundColor	      "green"
      FontName		      "宋体"
      FontSize		      12
      WaveForm		      "sine"
      Amplitude		      "1.000000"
      Frequency		      "10.000000"
      Units		      "rad/sec"
    }
    Block {
      BlockType		      Sin
      Name		      "载波"
      Position		      [55, 160, 75, 180]
      ForegroundColor	      "green"
      FontName		      "宋体"
      FontSize		      12
      Amplitude		      "1"
      Frequency		      "100"
      Phase		      "0"
      SampleTime	      "0.001"
    }
    Line {
      SrcBlock		      "Butterworth\nLP 滤波器"
      SrcPort		      1
      DstBlock		      "解调信号"
      DstPort		      1
    }
    Line {
      SrcBlock		      "乘法器1"
      SrcPort		      1
      DstBlock		      "Butterworth\nLP 滤波器"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Butterworth\nBP 滤波器 1"
      SrcPort		      1
      Points		      [25, 0]
      Branch {
	DstBlock		"上边带信号"
	DstPort			1
      }
      Branch {
	Points			[0, 120; -230, 0; 0, 80]
	DstBlock		"乘法器1"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "载波"
      SrcPort		      1
      Points		      [60, 0]
      Branch {
	Points			[0, -50]
	DstBlock		"乘法器"
	DstPort			2
      }
      Branch {
	Points			[0, 155]
	DstBlock		"乘法器1"
	DstPort			2
      }
    }
    Line {
      SrcBlock		      "Butterworth\nBP 滤波器 2"
      SrcPort		      1
      DstBlock		      "下边带信号"
      DstPort		      1
    }
    Line {
      SrcBlock		      "乘法器"
      SrcPort		      1
      Points		      [30, 0]
      Branch {
	DstBlock		"Butterworth\nBP 滤波器 1"
	DstPort			1
      }
      Branch {
	Points			[0, 70]
	DstBlock		"Butterworth\nBP 滤波器 2"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "信号发生器\n频率（弧度/秒）"
      SrcPort		      1
      DstBlock		      "乘法器"
      DstPort		      1
    }
    Annotation {
      Position		      [262, 357]
      VerticalAlignment	      "top"
      Text		      "同步解调"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [272, 27]
      VerticalAlignment	      "top"
      Text		      "同步调制/解调 AM 系统 （ 单边带 SSB ）—— 滤波"
"器法"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [192, 297]
      VerticalAlignment	      "top"
      Text		      "上边带 SSB"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [187, 337]
      VerticalAlignment	      "top"
      Text		      "导频信号"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [252, 127]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "DSB"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [77, 197]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "cos ( Wc * t + p )\nWc 载波角频率\np 载波初始相"
"位"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [67, 72]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "调制信号"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [127, 92]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "X(t)"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [242, 77]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "Y(t) = X(t)*cos(Wc*t+p)"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [402, 82]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "已调 SSB 信号"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [72, 252]
      VerticalAlignment	      "top"
      ForegroundColor	      "green"
      Text		      "对 SSB 信号，无法\n直接从其中提取参考\n信号，故"
"发送端在发\n射 SSB 信号的同时，\n还须发射受到一定程\n度抑制的载波信号。\n（称"
"为导频信号）"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [162, 222]
      VerticalAlignment	      "top"
      Text		      "发送端"
      FontName		      "宋体"
      FontSize		      12
    }
    Annotation {
      Position		      [137, 332]
      VerticalAlignment	      "top"
      Text		      "接收端"
      FontName		      "宋体"
      FontSize		      12
    }
  }
}