diff --git a/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.cc b/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.cc
index 8777fbc07..f3b96d61d 100644
--- a/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.cc
+++ b/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.cc
@@ -39,7 +39,7 @@ LrWpanSpectrumSignalParameters::LrWpanSpectrumSignalParameters (const LrWpanSpec
 }
 
 Ptr<SpectrumSignalParameters>
-LrWpanSpectrumSignalParameters::Copy (void)
+LrWpanSpectrumSignalParameters::Copy (void) const
 {
   NS_LOG_FUNCTION (this);
   return Create<LrWpanSpectrumSignalParameters> (*this);
diff --git a/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.h b/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.h
index 19d8ff82e..a9ac40e31 100644
--- a/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.h
+++ b/src/lr-wpan/model/lr-wpan-spectrum-signal-parameters.h
@@ -35,9 +35,7 @@ class PacketBurst;
  */
 struct LrWpanSpectrumSignalParameters : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy (void);
+  Ptr<SpectrumSignalParameters> Copy (void) const override;
 
   /**
    * default constructor
diff --git a/src/lte/model/lte-spectrum-signal-parameters.cc b/src/lte/model/lte-spectrum-signal-parameters.cc
index 50bab6b9d..953bf6282 100644
--- a/src/lte/model/lte-spectrum-signal-parameters.cc
+++ b/src/lte/model/lte-spectrum-signal-parameters.cc
@@ -43,14 +43,12 @@ LteSpectrumSignalParameters::LteSpectrumSignalParameters (const LteSpectrumSigna
 }
 
 Ptr<SpectrumSignalParameters>
-LteSpectrumSignalParameters::Copy ()
+LteSpectrumSignalParameters::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<LteSpectrumSignalParameters> (*this);
 }
 
-
-
 LteSpectrumSignalParametersDataFrame::LteSpectrumSignalParametersDataFrame ()
 {
   NS_LOG_FUNCTION (this);
@@ -69,7 +67,7 @@ LteSpectrumSignalParametersDataFrame::LteSpectrumSignalParametersDataFrame (cons
 }
 
 Ptr<SpectrumSignalParameters>
-LteSpectrumSignalParametersDataFrame::Copy ()
+LteSpectrumSignalParametersDataFrame::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<LteSpectrumSignalParametersDataFrame> (*this);
@@ -92,7 +90,7 @@ LteSpectrumSignalParametersDlCtrlFrame::LteSpectrumSignalParametersDlCtrlFrame (
 }
 
 Ptr<SpectrumSignalParameters>
-LteSpectrumSignalParametersDlCtrlFrame::Copy ()
+LteSpectrumSignalParametersDlCtrlFrame::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<LteSpectrumSignalParametersDlCtrlFrame> (*this);
@@ -112,16 +110,10 @@ LteSpectrumSignalParametersUlSrsFrame::LteSpectrumSignalParametersUlSrsFrame (co
 }
 
 Ptr<SpectrumSignalParameters>
-LteSpectrumSignalParametersUlSrsFrame::Copy ()
+LteSpectrumSignalParametersUlSrsFrame::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<LteSpectrumSignalParametersUlSrsFrame> (*this);
 }
 
-
-
-
-
-
-
 } // namespace ns3
diff --git a/src/lte/model/lte-spectrum-signal-parameters.h b/src/lte/model/lte-spectrum-signal-parameters.h
index 97cddd743..ba91a210f 100644
--- a/src/lte/model/lte-spectrum-signal-parameters.h
+++ b/src/lte/model/lte-spectrum-signal-parameters.h
@@ -38,9 +38,7 @@ class LteControlMessage;
  */
 struct LteSpectrumSignalParameters : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
    * default constructor
@@ -69,9 +67,7 @@ struct LteSpectrumSignalParameters : public SpectrumSignalParameters
 */
 struct LteSpectrumSignalParametersDataFrame : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
   * default constructor
@@ -102,9 +98,7 @@ struct LteSpectrumSignalParametersDataFrame : public SpectrumSignalParameters
 */
 struct LteSpectrumSignalParametersDlCtrlFrame : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
   * default constructor
@@ -133,9 +127,7 @@ struct LteSpectrumSignalParametersDlCtrlFrame : public SpectrumSignalParameters
 */
 struct LteSpectrumSignalParametersUlSrsFrame : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
   * default constructor
diff --git a/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.cc b/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.cc
index 4d64187c8..c8fbc50fb 100644
--- a/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.cc
+++ b/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.cc
@@ -40,7 +40,7 @@ HalfDuplexIdealPhySignalParameters::HalfDuplexIdealPhySignalParameters (const Ha
 }
 
 Ptr<SpectrumSignalParameters>
-HalfDuplexIdealPhySignalParameters::Copy ()
+HalfDuplexIdealPhySignalParameters::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<HalfDuplexIdealPhySignalParameters> (*this);
diff --git a/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.h b/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.h
index dd6a159f5..aca081aec 100644
--- a/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.h
+++ b/src/spectrum/model/half-duplex-ideal-phy-signal-parameters.h
@@ -35,9 +35,7 @@ class Packet;
  */
 struct HalfDuplexIdealPhySignalParameters : public SpectrumSignalParameters
 {
-
-  // inherited from SpectrumSignalParameters
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
    * default constructor
diff --git a/src/spectrum/model/spectrum-signal-parameters.cc b/src/spectrum/model/spectrum-signal-parameters.cc
index 4cee6ec04..da9699d97 100644
--- a/src/spectrum/model/spectrum-signal-parameters.cc
+++ b/src/spectrum/model/spectrum-signal-parameters.cc
@@ -50,7 +50,7 @@ SpectrumSignalParameters::SpectrumSignalParameters (const SpectrumSignalParamete
 }
 
 Ptr<SpectrumSignalParameters>
-SpectrumSignalParameters::Copy ()
+SpectrumSignalParameters::Copy () const
 {
   NS_LOG_FUNCTION (this);
   return Create<SpectrumSignalParameters> (*this);
diff --git a/src/spectrum/model/spectrum-signal-parameters.h b/src/spectrum/model/spectrum-signal-parameters.h
index 1dec5e47c..06bd89b94 100644
--- a/src/spectrum/model/spectrum-signal-parameters.h
+++ b/src/spectrum/model/spectrum-signal-parameters.h
@@ -81,7 +81,7 @@ struct SpectrumSignalParameters : public SimpleRefCount<SpectrumSignalParameters
    *
    * \return a copy of the (possibly derived) class
    */
-  virtual Ptr<SpectrumSignalParameters> Copy ();
+  virtual Ptr<SpectrumSignalParameters> Copy () const;
 
   /**
    * The Power Spectral Density of the
diff --git a/src/wifi/model/wifi-spectrum-signal-parameters.cc b/src/wifi/model/wifi-spectrum-signal-parameters.cc
index 115626a68..248c37eda 100644
--- a/src/wifi/model/wifi-spectrum-signal-parameters.cc
+++ b/src/wifi/model/wifi-spectrum-signal-parameters.cc
@@ -42,7 +42,7 @@ WifiSpectrumSignalParameters::WifiSpectrumSignalParameters (const WifiSpectrumSi
 }
 
 Ptr<SpectrumSignalParameters>
-WifiSpectrumSignalParameters::Copy ()
+WifiSpectrumSignalParameters::Copy () const
 {
   NS_LOG_FUNCTION (this);
   // Ideally we would use:
diff --git a/src/wifi/model/wifi-spectrum-signal-parameters.h b/src/wifi/model/wifi-spectrum-signal-parameters.h
index 80ae0cb3d..424164fcc 100644
--- a/src/wifi/model/wifi-spectrum-signal-parameters.h
+++ b/src/wifi/model/wifi-spectrum-signal-parameters.h
@@ -36,7 +36,7 @@ class WifiPpdu;
 struct WifiSpectrumSignalParameters : public SpectrumSignalParameters
 {
 
-  Ptr<SpectrumSignalParameters> Copy () override;
+  Ptr<SpectrumSignalParameters> Copy () const override;
 
   /**
    * default constructor