microwave-oven-spectrum-value-helper.cc

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/*
 * Copyright (c) 2009 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: Nicola Baldo <nbaldo@cttc.es>
 */
 
#include "microwave-oven-spectrum-value-helper.h"
 
#include "ns3/log.h"
 
namespace ns3
{
 
NS_LOG_COMPONENT_DEFINE("MicrowaveOvenSpectrumValue");
 
/// Spectrum model for the 5MHz model (model #2)
static Ptr<SpectrumModel> g_MicrowaveOvenSpectrumModel5Mhz;
/// Spectrum model for the 6MHz model (model #1)
static Ptr<SpectrumModel> g_MicrowaveOvenSpectrumModel6Mhz;
 
/**
 * \ingroup spectrum
 * Init a static class containing the MWO #2 model (5Mhz)
 */
static class MicrowaveOvenSpectrumModel5MhzInitializer
{
  public:
    MicrowaveOvenSpectrumModel5MhzInitializer()
    {
        NS_LOG_FUNCTION(this);
        Bands bands;
        for (double fl = 2400e6; fl < 2499e6; fl += 5e6)
        {
            BandInfo bi;
            bi.fl = fl;
            bi.fc = fl + 5e6;
            bi.fh = fl + 10e6;
            bands.push_back(bi);
        }
        NS_LOG_LOGIC("bands.size () :" << bands.size());
        g_MicrowaveOvenSpectrumModel5Mhz = Create<SpectrumModel>(bands);
    }
} g_MicrowaveOvenSpectrumModel5MhzInitializerInstance; //!< MWO model #2
 
/**
 * \ingroup spectrum
 * Init a static class containing the MWO #1 model (6Mhz)
 */
static class MicrowaveOvenSpectrumModel6MhzInitializer
{
  public:
    MicrowaveOvenSpectrumModel6MhzInitializer()
    {
        NS_LOG_FUNCTION(this);
        Bands bands;
        for (double fl = 2360e6; fl < 2479e6; fl += 6e6)
        {
            BandInfo bi;
            bi.fl = fl;
            bi.fc = fl + 6e6;
            bi.fh = fl + 12e6;
            bands.push_back(bi);
        }
        NS_LOG_LOGIC("bands.size () :" << bands.size());
        g_MicrowaveOvenSpectrumModel6Mhz = Create<SpectrumModel>(bands);
    }
} g_MicrowaveOvenSpectrumModel6MhzInitializerInstance; //!< MWO model #1
 
Ptr<SpectrumValue>
MicrowaveOvenSpectrumValueHelper::CreatePowerSpectralDensityMwo1()
{
    Ptr<SpectrumValue> psd = Create<SpectrumValue>(g_MicrowaveOvenSpectrumModel6Mhz);
 
    // values from this paper:
    // Tanim M. Taher, Matthew J. Misurac, Joseph L. LoCicero, and Donald R. Ucci,
    // "MICROWAVE OVEN SIGNAL MODELING", in Proc. of IEEE WCNC, 2008,
    // see Figure 3, "Experimental PSD of MWO #1"
    // the figure has a resolution of 12 MHz per division; we use a
    // SpectrumModel with a per-subband bandwidth of 6MHz, so we have
    // two samples per division. The values used here are an approximation
    // of what appears in the figure.
 
    (*psd)[0] = -67.5;
    (*psd)[1] = -67.5;
    (*psd)[2] = -67.5;
    (*psd)[3] = -67.5;
    (*psd)[4] = -67.5;
    (*psd)[5] = -66;
    (*psd)[6] = -64;
    (*psd)[7] = -63;
    (*psd)[8] = -62.5;
    (*psd)[9] = -63;
    (*psd)[10] = -62.5;
    (*psd)[11] = -62.5;
    (*psd)[12] = -58;
    (*psd)[13] = -53.5;
    (*psd)[14] = -44;
    (*psd)[15] = -38;
    (*psd)[16] = -45;
    (*psd)[17] = -65;
    (*psd)[18] = -67.5;
    (*psd)[19] = -67.5;
 
    // convert to W/Hz
    (*psd) = Pow(10.0, ((*psd) - 30) / 10.0);
 
    return psd;
}
 
Ptr<SpectrumValue>
MicrowaveOvenSpectrumValueHelper::CreatePowerSpectralDensityMwo2()
{
    // values from this paper:
    // Tanim M. Taher, Matthew J. Misurac, Joseph L. LoCicero, and Donald R. Ucci,
    // "MICROWAVE OVEN SIGNAL MODELING", in Proc. of IEEE WCNC, 2008,
    // see Figure 9, "Experimental PSD of actual MWO #2"
    // the figure has a resolution of 10 MHz per division; we use a
    // SpectrumModel with a per-subband bandwidth of 5MHz, so we have
    // two samples per division. The values used here are an approximation
    // of what appears in the figure.
 
    Ptr<SpectrumValue> psd = Create<SpectrumValue>(g_MicrowaveOvenSpectrumModel5Mhz);
 
    (*psd)[0] = -68;
    (*psd)[1] = -68;
    (*psd)[2] = -68;
    (*psd)[3] = -68;
    (*psd)[4] = -65;
    (*psd)[5] = -62;
    (*psd)[6] = -56;
    (*psd)[7] = -55;
    (*psd)[8] = -47;
    (*psd)[9] = -40;
    (*psd)[10] = -37;
    (*psd)[11] = -33;
    (*psd)[12] = -45;
    (*psd)[13] = -67;
    (*psd)[14] = -68;
    (*psd)[15] = -68;
    (*psd)[16] = -68;
    (*psd)[17] = -68;
    (*psd)[18] = -68;
    (*psd)[19] = -68;
 
    // convert to W/Hz
    (*psd) = Pow(10.0, ((*psd) - 30) / 10.0);
 
    return psd;
}
 
} // namespace ns3