diff --git a/src/spectrum/model/constant-spectrum-propagation-loss.cc b/src/spectrum/model/constant-spectrum-propagation-loss.cc
new file mode 100644
index 000000000..74ad71e8b
--- /dev/null
+++ b/src/spectrum/model/constant-spectrum-propagation-loss.cc
@@ -0,0 +1,85 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Manuel Requena <manuel.requena@cttc.es>
+ */
+
+#include "ns3/log.h"
+
+#include "ns3/constant-spectrum-propagation-loss.h"
+#include "ns3/double.h"
+
+
+NS_LOG_COMPONENT_DEFINE ("ConstantSpectrumPropagationLossModel");
+
+namespace ns3 {
+
+
+NS_OBJECT_ENSURE_REGISTERED (ConstantSpectrumPropagationLossModel);
+
+ConstantSpectrumPropagationLossModel::ConstantSpectrumPropagationLossModel ()
+{
+  NS_LOG_FUNCTION (this);
+}
+
+ConstantSpectrumPropagationLossModel::~ConstantSpectrumPropagationLossModel ()
+{
+  NS_LOG_FUNCTION (this);
+}
+
+TypeId
+ConstantSpectrumPropagationLossModel::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::ConstantSpectrumPropagationLossModel")
+    .SetParent<SpectrumPropagationLossModel> ()
+    .AddConstructor<ConstantSpectrumPropagationLossModel> ()
+    .AddAttribute ("Loss",
+                   "Path loss (dB) between transmitter and receiver",
+                   DoubleValue (1.0),
+                   MakeDoubleAccessor (&ConstantSpectrumPropagationLossModel::m_loss),
+                   MakeDoubleChecker<double> ())
+    ;
+  return tid;
+}
+
+
+Ptr<SpectrumValue>
+ConstantSpectrumPropagationLossModel::DoCalcRxPowerSpectralDensity (Ptr<const SpectrumValue> txPsd,
+                                                                    Ptr<const MobilityModel> a,
+                                                                    Ptr<const MobilityModel> b) const
+{
+  NS_LOG_FUNCTION (this);
+
+  Ptr<SpectrumValue> rxPsd = Copy<SpectrumValue> (txPsd);
+  Values::iterator vit = rxPsd->ValuesBegin ();
+  Bands::const_iterator fit = rxPsd->ConstBandsBegin ();
+
+//   NS_LOG_INFO ("Loss = " << m_loss);
+  while (vit != rxPsd->ValuesEnd ())
+    {
+      NS_ASSERT (fit != rxPsd->ConstBandsEnd ());
+//       NS_LOG_INFO ("Ptx = " << *vit);
+      *vit /= m_loss; // Prx = Ptx / loss
+//       NS_LOG_INFO ("Prx = " << *vit);
+      ++vit;
+      ++fit;
+    }
+  return rxPsd;
+}
+
+
+}  // namespace ns3
diff --git a/src/spectrum/model/constant-spectrum-propagation-loss.h b/src/spectrum/model/constant-spectrum-propagation-loss.h
new file mode 100644
index 000000000..4063b0b7e
--- /dev/null
+++ b/src/spectrum/model/constant-spectrum-propagation-loss.h
@@ -0,0 +1,48 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Manuel Requena <manuel.requena@cttc.es>
+ */
+
+#ifndef CONSTANT_SPECTRUM_PROPAGATION_LOSS_H
+#define CONSTANT_SPECTRUM_PROPAGATION_LOSS_H
+
+#include "ns3/spectrum-propagation-loss-model.h"
+
+namespace ns3 {
+
+
+class ConstantSpectrumPropagationLossModel : public SpectrumPropagationLossModel
+{
+public:
+  ConstantSpectrumPropagationLossModel ();
+  ~ConstantSpectrumPropagationLossModel ();
+
+  static TypeId GetTypeId ();
+
+  virtual Ptr<SpectrumValue> DoCalcRxPowerSpectralDensity (Ptr<const SpectrumValue> txPsd,
+                                                           Ptr<const MobilityModel> a,
+                                                           Ptr<const MobilityModel> b) const;
+
+private:
+  double m_loss;
+};
+
+
+} // namespace ns3
+
+#endif /* CONSTANT_SPECTRUM_PROPAGATION_LOSS_MODEL_H */
diff --git a/src/spectrum/wscript b/src/spectrum/wscript
index c396aea22..6f88b8d26 100644
--- a/src/spectrum/wscript
+++ b/src/spectrum/wscript
@@ -10,6 +10,7 @@ def build(bld):
         'model/spectrum-type.cc',
         'model/spectrum-propagation-loss-model.cc',
         'model/friis-spectrum-propagation-loss.cc',
+        'model/constant-spectrum-propagation-loss.cc',
         'model/spectrum-phy.cc',
         'model/spectrum-channel.cc',        
         'model/single-model-spectrum-channel.cc',
@@ -47,6 +48,7 @@ def build(bld):
         'model/spectrum-type.h',
         'model/spectrum-propagation-loss-model.h',
         'model/friis-spectrum-propagation-loss.h',
+        'model/constant-spectrum-propagation-loss.h',
         'model/spectrum-phy.h',
         'model/spectrum-channel.h',
         'model/single-model-spectrum-channel.h',