📄 am_sys2.mdl
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MaskVisibilityString "on,on,on,on"
MaskInitialization "npts=@1; fftpts=@2; HowOften=@3; ts=@4(1); if l"
"ength(@4) > 1, offset = @4(2), else, offset = 0; end"
MaskDisplay "plot(0,0,100,100,[11,93,93,11,11],[90,90,40,40,"
"90],[90,80,72,64,55,45,41,36,20],[50,50,52,59,67,75,78,80,80])"
MaskIconFrame on
MaskIconOpaque on
MaskIconRotate "none"
MaskIconUnits "autoscale"
MaskValueString "512|512|64|0.001"
System {
Name "谱分析"
Location [2, 84, 373, 269]
Open off
ModelBrowserVisibility off
ModelBrowserWidth 200
ScreenColor "automatic"
PaperOrientation "landscape"
PaperPositionMode "auto"
PaperType "usletter"
PaperUnits "inches"
ZoomFactor "100"
AutoZoom on
Block {
BlockType Inport
Name "system input"
Position [55, 30, 75, 50]
Port "1"
PortWidth "-1"
SampleTime "-1"
DataType "auto"
SignalType "auto"
Interpolate on
}
Block {
BlockType Inport
Name "system output"
Position [55, 110, 75, 130]
Port "2"
PortWidth "-1"
SampleTime "-1"
DataType "auto"
SignalType "auto"
Interpolate on
}
Block {
BlockType Mux
Name "Mux"
Ports [2, 1, 0, 0, 0]
Position [145, 71, 175, 104]
Inputs "2"
DisplayOption "none"
}
Block {
BlockType "S-Function"
Name "S-function block\nwhich calls M-file"
Ports [1, 0, 0, 0, 0]
Position [250, 72, 295, 108]
FunctionName "ssfuntf"
Parameters "fftpts,npts,HowOften,offset,ts,0"
PortCounts "[]"
SFunctionModules "''"
}
Line {
SrcBlock "system output"
SrcPort 1
Points [30, 0; 0, -25]
DstBlock "Mux"
DstPort 2
}
Line {
SrcBlock "system input"
SrcPort 1
Points [30, 0; 0, 40]
DstBlock "Mux"
DstPort 1
}
Line {
SrcBlock "Mux"
SrcPort 1
DstBlock "S-function block\nwhich calls M-file"
DstPort 1
}
}
}
Block {
BlockType Scope
Name "提取出的载波"
Ports [1, 0, 0, 0, 0]
Position [520, 200, 550, 230]
ForegroundColor "yellow"
FontName "宋体"
FontSize 12
Floating off
Location [76, 196, 407, 340]
Open off
NumInputPorts "1"
TickLabels "OneTimeTick"
ZoomMode "on"
List {
ListType AxesTitles
axes1 "%<SignalLabel>"
}
Grid "on"
TimeRange "1.000000"
YMin "-4"
YMax "4"
SaveToWorkspace off
SaveName "ScopeData"
DataFormat "Matrix"
LimitMaxRows on
MaxRows "5000"
Decimation "1"
SampleInput off
SampleTime "0"
}
Block {
BlockType Scope
Name "提取出的载波与\n接收信号的乘积"
Ports [1, 0, 0, 0, 0]
Position [520, 265, 550, 295]
FontName "宋体"
FontSize 12
Floating off
Location [183, 253, 512, 423]
Open off
NumInputPorts "1"
TickLabels "OneTimeTick"
ZoomMode "on"
List {
ListType AxesTitles
axes1 "%<SignalLabel>"
}
Grid "on"
TimeRange "1.000000"
YMin "-4"
YMax "4"
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 [35, 63, 80, 97]
FontName "宋体"
FontSize 12
WaveForm "sine"
Amplitude "1.000000"
Frequency "10.000000"
Units "rad/sec"
}
Block {
BlockType Sin
Name "载波"
Position [50, 130, 70, 150]
FontName "宋体"
FontSize 12
Amplitude "1"
Frequency "100"
Phase "0"
SampleTime "0.001"
}
Block {
BlockType Gain
Name "增益"
Position [195, 202, 220, 228]
ForegroundColor "yellow"
FontName "宋体"
FontSize 12
Gain "4"
SaturateOnIntegerOverflow on
}
Block {
BlockType Gain
Name "增益1"
Position [435, 202, 460, 228]
ForegroundColor "yellow"
FontName "宋体"
FontSize 12
Gain "4"
SaturateOnIntegerOverflow on
}
Line {
SrcBlock "载波"
SrcPort 1
Points [35, 0; 0, -50]
DstBlock "乘法器"
DstPort 2
}
Line {
SrcBlock "平方运算"
SrcPort 1
DstBlock "Butterworth\nBP 滤波器"
DstPort 1
}
Line {
SrcBlock "Butterworth\nBP 滤波器"
SrcPort 1
DstBlock "增益"
DstPort 1
}
Line {
SrcBlock "增益"
SrcPort 1
DstBlock "二分频"
DstPort 1
}
Line {
SrcBlock "二分频"
SrcPort 1
DstBlock "Butterworth\nBP 滤波器1"
DstPort 1
}
Line {
SrcBlock "Butterworth\nBP 滤波器1"
SrcPort 1
DstBlock "增益1"
DstPort 1
}
Line {
SrcBlock "传输延迟"
SrcPort 1
DstBlock "乘法器2"
DstPort 2
}
Line {
SrcBlock "增益1"
SrcPort 1
Points [15, 0]
Branch {
DstBlock "提取出的载波"
DstPort 1
}
Branch {
Points [0, 50; -270, 0; 0, 75]
DstBlock "乘法器2"
DstPort 1
}
}
Line {
SrcBlock "Butterworth\nLP 滤波器"
SrcPort 1
DstBlock "解调后信号波形"
DstPort 1
}
Line {
SrcBlock "乘法器2"
SrcPort 1
Points [20, 0]
Branch {
DstBlock "Butterworth\nLP 滤波器"
DstPort 1
}
Branch {
Points [0, -65]
DstBlock "提取出的载波与\n接收信号的乘积"
DstPort 1
}
}
Line {
SrcBlock "乘法器"
SrcPort 1
Points [20, 0]
Branch {
Points [0, 85; -265, 0; 0, 40]
Branch {
Points [0, 10]
Branch {
Points [0, 130]
DstBlock "传输延迟"
DstPort 1
}
Branch {
DstBlock "平方运算"
DstPort 2
}
}
Branch {
DstBlock "平方运算"
DstPort 1
}
}
Branch {
Points [210, 0]
Branch {
DstBlock "调制后信号波形"
DstPort 1
}
Branch {
Points [0, 45]
DstBlock "谱分析"
DstPort 1
}
}
}
Line {
SrcBlock "信号发生器\n频率（弧度/秒）"
SrcPort 1
Points [95, 0]
Branch {
DstBlock "乘法器"
DstPort 1
}
Branch {
Points [0, -35; 275, 0; 0, 105]
DstBlock "谱分析"
DstPort 2
}
}
Annotation {
Position [267, 12]
VerticalAlignment "top"
Text "同步调制/解调 AM 系统 （ 双边带 DSB ）"
FontName "宋体"
FontSize 12
}
Annotation {
Position [302, 177]
VerticalAlignment "top"
Text "同步载波提取"
FontName "宋体"
FontSize 12
}
Annotation {
Position [32, 182]
VerticalAlignment "top"
Text "接收端"
FontName "宋体"
FontSize 12
}
Annotation {
Position [322, 92]
VerticalAlignment "top"
Text "已调 DSB 信号"
FontName "宋体"
FontSize 12
}
Annotation {
Position [297, 107]
VerticalAlignment "top"
Text "发送端"
FontName "宋体"
FontSize 12
}
Annotation {
Position [347, 67]
VerticalAlignment "top"
Text "Y(t) = X(t)*cos(Wc*t+p)"
FontName "宋体"
FontSize 12
}
Annotation {
Position [152, 62]
VerticalAlignment "top"
Text "X(t)"
FontName "宋体"
FontSize 12
}
Annotation {
Position [62, 42]
VerticalAlignment "top"
Text "调制信号"
FontName "宋体"
FontSize 12
}
Annotation {
Position [137, 302]
VerticalAlignment "top"
Text "弥补提取载波\n所需的时延"
FontName "宋体"
FontSize 12
}
Annotation {
Position [177, 112]
VerticalAlignment "top"
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 [247, 157]
VerticalAlignment "top"
Text "传输信道"
}
}
}
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