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wifi: Add option to configure the OFDM transmit spectrum mask

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This commit is contained in:
Sébastien Deronne
2019-09-03 17:07:52 +02:00
parent 644e5ee55c
commit bdb3bfc22f
6 changed files with 85 additions and 45 deletions
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2
CHANGES.html
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@@ -67,6 +67,8 @@ in order to support multi-users (MU) transmissions.
</li>
<li> The wifi trace <b>WifiPhy::PhyRxBegin</b> has been extended to report the received power for every band.
</li>
<li>New attributes <b>SpectrumWifiPhy::TxMaskInnerBandMinimumRejection</b>, <b>SpectrumWifiPhy::TxMaskOuterBandMinimumRejection</b> and <b>SpectrumWifiPhy::TxMaskOuterBandMaximumRejection</b> have been added to configure the OFDM transmit masks.
</li>
</ul>
<h2>Changes to build system:</h2>
<ul>

55
src/spectrum/model/wifi-spectrum-value-helper.cc
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@@ -157,9 +157,10 @@ WifiSpectrumValueHelper::CreateDsssTxPowerSpectralDensity (uint32_t centerFreque
}
Ptr<SpectrumValue>
WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth)
WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr, double minOuterBandDbr, double lowestPointDbr)
{
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth);
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth << minInnerBandDbr << minOuterBandDbr << lowestPointDbr);
uint32_t bandBandwidth = 0;
uint32_t innerSlopeWidth = 0;
switch (channelWidth)
@@ -203,16 +204,18 @@ WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (uint32_t centerFreque
WifiSpectrumBand maskBand (0, nAllocatedBands + nGuardBands);
CreateSpectrumMaskForOfdm (c, subBands, maskBand,
txPowerPerBandW, nGuardBands,
innerSlopeWidth, -40.0); // -40 dBr for the outermost points of the standard defined mask for 11a, 11g and downclocked versions of 11a for 11p
innerSlopeWidth, minInnerBandDbr,
minOuterBandDbr, lowestPointDbr);
NormalizeSpectrumMask (c, txPowerW);
NS_ASSERT_MSG (std::abs (txPowerW - Integral (*c)) < 1e-6, "Power allocation failed");
return c;
}
Ptr<SpectrumValue>
WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth)
WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr, double minOuterBandDbr, double lowestPointDbr)
{
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth);
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth << minInnerBandDbr << minOuterBandDbr << lowestPointDbr);
uint32_t bandBandwidth = 312500;
Ptr<SpectrumValue> c = Create<SpectrumValue> (GetSpectrumModel (centerFrequency, channelWidth, bandBandwidth, guardBandwidth));
uint32_t nGuardBands = static_cast<uint32_t> (((2 * guardBandwidth * 1e6) / bandBandwidth) + 0.5);
@@ -256,10 +259,7 @@ WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFreq
uint32_t start16 = stop15 + 2;
uint32_t stop16 = start16 + 28 - 1;
//Prepare spectrum mask specific variables
uint32_t innerSlopeWidth = static_cast<uint32_t> ((2e6 / bandBandwidth) + 0.5); //size in number of subcarriers of the 0dBr<->20dBr slope (2MHz for HT/VHT)
double lowestPointDbr = (centerFrequency >= 5000) ?
-40.0 : //if 5 GHz band
-45.0; //if 2.4 GHz band
uint32_t innerSlopeWidth = static_cast<uint32_t> ((2e6 / bandBandwidth) + 0.5); //size in number of subcarriers of the inner band (2MHz for HT/VHT)
std::vector <WifiSpectrumBand> subBands; //list of data/pilot-containing subBands (sent at 0dBr)
WifiSpectrumBand maskBand (0, nAllocatedBands + nGuardBands);
switch (channelWidth)
@@ -283,7 +283,6 @@ WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFreq
// 224 subcarriers (208 data + 16 pilot)
// possible alternative: 242 subcarriers (234 data + 8 pilot)
txPowerPerBandW = txPowerW / 224;
NS_ASSERT (lowestPointDbr == -40.0);
subBands.push_back (std::make_pair (start1, stop1));
subBands.push_back (std::make_pair (start2, stop2));
subBands.push_back (std::make_pair (start3, stop3));
@@ -297,7 +296,6 @@ WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFreq
// 448 subcarriers (416 data + 32 pilot)
// possible alternative: 484 subcarriers (468 data + 16 pilot)
txPowerPerBandW = txPowerW / 448;
NS_ASSERT (lowestPointDbr == -40.0);
subBands.push_back (std::make_pair (start1, stop1));
subBands.push_back (std::make_pair (start2, stop2));
subBands.push_back (std::make_pair (start3, stop3));
@@ -320,16 +318,18 @@ WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFreq
//Build transmit spectrum mask
CreateSpectrumMaskForOfdm (c, subBands, maskBand,
txPowerPerBandW, nGuardBands,
innerSlopeWidth, lowestPointDbr);
innerSlopeWidth, minInnerBandDbr,
minOuterBandDbr, lowestPointDbr);
NormalizeSpectrumMask (c, txPowerW);
NS_ASSERT_MSG (std::abs (txPowerW - Integral (*c)) < 1e-6, "Power allocation failed");
return c;
}
Ptr<SpectrumValue>
WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth)
WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr, double minOuterBandDbr, double lowestPointDbr)
{
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth);
NS_LOG_FUNCTION (centerFrequency << channelWidth << txPowerW << guardBandwidth << minInnerBandDbr << minOuterBandDbr << lowestPointDbr);
uint32_t bandBandwidth = 78125;
Ptr<SpectrumValue> c = Create<SpectrumValue> (GetSpectrumModel (centerFrequency, channelWidth, bandBandwidth, guardBandwidth));
uint32_t nGuardBands = static_cast<uint32_t> (((2 * guardBandwidth * 1e6) / bandBandwidth) + 0.5);
@@ -345,10 +345,7 @@ WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFreq
uint32_t start4;
uint32_t stop4;
//Prepare spectrum mask specific variables
uint32_t innerSlopeWidth = static_cast<uint32_t> ((1e6 / bandBandwidth) + 0.5); //size in number of subcarriers of the 0dBr<->20dBr slope
double lowestPointDbr = (centerFrequency >= 5000) ?
-40.0 : //if 5 GHz band
-45.0; //if 2.4 GHz band
uint32_t innerSlopeWidth = static_cast<uint32_t> ((1e6 / bandBandwidth) + 0.5); //size in number of subcarriers of the inner band
std::vector <WifiSpectrumBand> subBands; //list of data/pilot-containing subBands (sent at 0dBr)
WifiSpectrumBand maskBand (0, nAllocatedBands + nGuardBands);
switch (channelWidth)
@@ -417,7 +414,8 @@ WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFreq
//Build transmit spectrum mask
CreateSpectrumMaskForOfdm (c, subBands, maskBand,
txPowerPerBandW, nGuardBands,
innerSlopeWidth, lowestPointDbr);
innerSlopeWidth, minInnerBandDbr,
minOuterBandDbr, lowestPointDbr);
NormalizeSpectrumMask (c, txPowerW);
NS_ASSERT_MSG (std::abs (txPowerW - Integral (*c)) < 1e-6, "Power allocation failed");
return c;
@@ -469,10 +467,11 @@ WifiSpectrumValueHelper::CreateRfFilter (uint32_t centerFrequency, uint16_t tota
void
WifiSpectrumValueHelper::CreateSpectrumMaskForOfdm (Ptr<SpectrumValue> c, std::vector <WifiSpectrumBand> allocatedSubBands, WifiSpectrumBand maskBand,
double txPowerPerBandW, uint32_t nGuardBands,
uint32_t innerSlopeWidth, double lowestPointDbr)
double txPowerPerBandW, uint32_t nGuardBands, uint32_t innerSlopeWidth,
double minInnerBandDbr, double minOuterBandDbr, double lowestPointDbr)
{
NS_LOG_FUNCTION (c << allocatedSubBands.front ().first << allocatedSubBands.back ().second << maskBand.first << maskBand.second << txPowerPerBandW << nGuardBands << innerSlopeWidth << lowestPointDbr);
NS_LOG_FUNCTION (c << allocatedSubBands.front ().first << allocatedSubBands.back ().second << maskBand.first << maskBand.second <<
txPowerPerBandW << nGuardBands << innerSlopeWidth << minInnerBandDbr << minOuterBandDbr << lowestPointDbr);
uint32_t numSubBands = allocatedSubBands.size ();
uint32_t numBands = c->GetSpectrumModel ()->GetNumBands ();
uint32_t numMaskBands = maskBand.second - maskBand.first + 1;
@@ -481,8 +480,8 @@ WifiSpectrumValueHelper::CreateSpectrumMaskForOfdm (Ptr<SpectrumValue> c, std::v
//Different power levels
double txPowerRefDbm = (10.0 * std::log10 (txPowerPerBandW * 1000.0));
double txPowerInnerBandMinDbm = txPowerRefDbm - 20;
double txPowerMiddleBandMinDbm = txPowerRefDbm - 28;
double txPowerInnerBandMinDbm = txPowerRefDbm + minInnerBandDbr;
double txPowerMiddleBandMinDbm = txPowerRefDbm + minOuterBandDbr;
double txPowerOuterBandMinDbm = txPowerRefDbm + lowestPointDbr; //TODO also take into account dBm/MHz constraints
//Different widths (in number of bands)
@@ -519,8 +518,8 @@ WifiSpectrumValueHelper::CreateSpectrumMaskForOfdm (Ptr<SpectrumValue> c, std::v
+ (flatJunctionRight.second - flatJunctionRight.first + 1)));
//Different slopes
double innerSlope = 20.0 / innerSlopeWidth; //0 to 20dBr
double middleSlope = 8.0 / middleSlopeWidth; //20 to 28dBr
double innerSlope = (-1 * minInnerBandDbr) / innerSlopeWidth;
double middleSlope = (-1 * (minOuterBandDbr - minInnerBandDbr)) / middleSlopeWidth;
double outerSlope = (txPowerMiddleBandMinDbm - txPowerOuterBandMinDbm) / outerSlopeWidth;
//Build spectrum mask
@@ -562,7 +561,7 @@ WifiSpectrumValueHelper::CreateSpectrumMaskForOfdm (Ptr<SpectrumValue> c, std::v
}
else
{
txPowerW = DbmToW (txPowerInnerBandMinDbm); //consider that nulled as much as possible inband but power leakage -> -20dBr
txPowerW = DbmToW (txPowerInnerBandMinDbm);
}
}
else if (i <= innerBandRight.second && i >= innerBandRight.first)
@@ -689,7 +688,6 @@ WifiSpectrumValue5MhzFactory::CreateTxPowerSpectralDensity (double txPower, uint
return txPsd;
}
Ptr<SpectrumValue>
WifiSpectrumValue5MhzFactory::CreateRfFilter (uint8_t channel)
{
@@ -706,5 +704,4 @@ WifiSpectrumValue5MhzFactory::CreateRfFilter (uint8_t channel)
return rf;
}
} // namespace ns3

27
src/spectrum/model/wifi-spectrum-value-helper.h
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@@ -88,9 +88,13 @@ public:
* \param channelWidth channel width (MHz)
* \param txPowerW transmit power (W) to allocate
* \param guardBandwidth width of the guard band (MHz)
* \param minInnerBandDbr the minimum relative power in the inner band (in dBr)
* \param minOuterbandDbr the minimum relative power in the outer band (in dBr)
* \param lowestPointDbr maximum relative power of the outermost subcarriers of the guard band (in dBr)
* \return a pointer to a newly allocated SpectrumValue representing the OFDM Transmit Power Spectral Density in W/Hz for each Band
*/
static Ptr<SpectrumValue> CreateOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth);
static Ptr<SpectrumValue> CreateOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr = -20, double minOuterbandDbr = -28, double lowestPointDbr = -40);
/**
* Create a transmit power spectral density corresponding to OFDM
@@ -101,9 +105,13 @@ public:
* \param channelWidth channel width (MHz)
* \param txPowerW transmit power (W) to allocate
* \param guardBandwidth width of the guard band (MHz)
* \param minInnerBandDbr the minimum relative power in the inner band (in dBr)
* \param minOuterbandDbr the minimum relative power in the outer band (in dBr)
* \param lowestPointDbr maximum relative power of the outermost subcarriers of the guard band (in dBr)
* \return a pointer to a newly allocated SpectrumValue representing the HT OFDM Transmit Power Spectral Density in W/Hz for each Band
*/
static Ptr<SpectrumValue> CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth);
static Ptr<SpectrumValue> CreateHtOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr = -20, double minOuterbandDbr = -28, double lowestPointDbr = -40);
/**
* Create a transmit power spectral density corresponding to OFDM
@@ -114,9 +122,13 @@ public:
* \param channelWidth channel width (MHz)
* \param txPowerW transmit power (W) to allocate
* \param guardBandwidth width of the guard band (MHz)
* \param minInnerBandDbr the minimum relative power in the inner band (in dBr)
* \param minOuterbandDbr the minimum relative power in the outer band (in dBr)
* \param lowestPointDbr maximum relative power of the outermost subcarriers of the guard band (in dBr)
* \return a pointer to a newly allocated SpectrumValue representing the HE OFDM Transmit Power Spectral Density in W/Hz for each Band
*/
static Ptr<SpectrumValue> CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth);
static Ptr<SpectrumValue> CreateHeOfdmTxPowerSpectralDensity (uint32_t centerFrequency, uint16_t channelWidth, double txPowerW, uint16_t guardBandwidth,
double minInnerBandDbr = -20, double minOuterbandDbr = -28, double lowestPointDbr = -40);
/**
* Create a power spectral density corresponding to the noise
@@ -157,6 +169,7 @@ public:
* Create a transmit power spectral density corresponding to OFDM
* transmit spectrum mask requirements for 11a/11g/11n/11ac/11ax
* Channel width may vary between 5, 10, 20, 40, 80, and 160 MHz.
* The default (standard) values are illustrated below.
*
* [ guard band ][ channel width ][ guard band ]
* __________ __________ _ 0 dBr
@@ -184,13 +197,15 @@ public:
* \param maskBand start and stop subcarrier indexes of transmit mask (in case signal doesn't cover whole SpectrumModel)
* \param txPowerPerBandW power allocated to each subcarrier in the allocated sub bands
* \param nGuardBands size (in number of subcarriers) of the guard band (left and right)
* \param innerSlopeWidth size (in number of subcarriers) of the inner band (i.e. slope going from 0 dBr to -20 dBr)
* \param innerSlopeWidth size (in number of subcarriers) of the inner band (i.e. slope going from 0 dBr to -20 dBr in the figure above)
* \param minInnerBandDbr the minimum relative power in the inner band (i.e. -20 dBr in the figure above)
* \param minOuterbandDbr the minimum relative power in the outer band (i.e. -28 dBr in the figure above)
* \param lowestPointDbr maximum relative power of the outermost subcarriers of the guard band (in dBr)
* \return a pointer to a newly allocated SpectrumValue representing the HT OFDM Transmit Power Spectral Density in W/Hz for each Band
*/
static void CreateSpectrumMaskForOfdm (Ptr<SpectrumValue> c, std::vector <WifiSpectrumBand> allocatedSubBands, WifiSpectrumBand maskBand,
double txPowerPerBandW, uint32_t nGuardBands,
uint32_t innerSlopeWidth, double lowestPointDbr);
double txPowerPerBandW, uint32_t nGuardBands, uint32_t innerSlopeWidth,
double minInnerBandDbr, double minOuterbandDbr, double lowestPointDbr);
/**
* Normalize the transmit spectrum mask generated by CreateSpectrumMaskForOfdm

28
src/wifi/model/spectrum-wifi-phy.cc
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@@ -24,6 +24,7 @@
*/
#include "ns3/log.h"
#include "ns3/double.h"
#include "ns3/boolean.h"
#include "ns3/net-device.h"
#include "ns3/node.h"
@@ -47,10 +48,26 @@ SpectrumWifiPhy::GetTypeId (void)
.SetParent<WifiPhy> ()
.SetGroupName ("Wifi")
.AddConstructor<SpectrumWifiPhy> ()
.AddAttribute ("DisableWifiReception", "Prevent Wi-Fi frame sync from ever happening",
.AddAttribute ("DisableWifiReception",
"Prevent Wi-Fi frame sync from ever happening",
BooleanValue (false),
MakeBooleanAccessor (&SpectrumWifiPhy::m_disableWifiReception),
MakeBooleanChecker ())
.AddAttribute ("TxMaskInnerBandMinimumRejection",
"Minimum rejection (dBr) for the inner band of the transmit spectrum mask",
DoubleValue (-20.0),
MakeDoubleAccessor (&SpectrumWifiPhy::m_txMaskInnerBandMinimumRejection),
MakeDoubleChecker<double> ())
.AddAttribute ("TxMaskOuterBandMinimumRejection",
"Minimum rejection (dBr) for the outer band of the transmit spectrum mask",
DoubleValue (-28.0),
MakeDoubleAccessor (&SpectrumWifiPhy::m_txMaskOuterBandMinimumRejection),
MakeDoubleChecker<double> ())
.AddAttribute ("TxMaskOuterBandMaximumRejection",
"Maximum rejection (dBr) for the outer band of the transmit spectrum mask",
DoubleValue (-40.0),
MakeDoubleAccessor (&SpectrumWifiPhy::m_txMaskOuterBandMaximumRejection),
MakeDoubleChecker<double> ())
.AddTraceSource ("SignalArrival",
"Signal arrival",
MakeTraceSourceAccessor (&SpectrumWifiPhy::m_signalCb),
@@ -374,7 +391,8 @@ SpectrumWifiPhy::GetTxPowerSpectralDensity (uint16_t centerFrequency, uint16_t c
{
case WIFI_MOD_CLASS_OFDM:
case WIFI_MOD_CLASS_ERP_OFDM:
v = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth));
v = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth),
m_txMaskInnerBandMinimumRejection, m_txMaskOuterBandMinimumRejection, m_txMaskOuterBandMaximumRejection);
break;
case WIFI_MOD_CLASS_DSSS:
case WIFI_MOD_CLASS_HR_DSSS:
@@ -383,10 +401,12 @@ SpectrumWifiPhy::GetTxPowerSpectralDensity (uint16_t centerFrequency, uint16_t c
break;
case WIFI_MOD_CLASS_HT:
case WIFI_MOD_CLASS_VHT:
v = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth));
v = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth),
m_txMaskInnerBandMinimumRejection, m_txMaskOuterBandMinimumRejection, m_txMaskOuterBandMaximumRejection);
break;
case WIFI_MOD_CLASS_HE:
v = WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth));
v = WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (centerFrequency, channelWidth, txPowerW, GetGuardBandwidth (channelWidth),
m_txMaskInnerBandMinimumRejection, m_txMaskOuterBandMinimumRejection, m_txMaskOuterBandMaximumRejection);
break;
default:
NS_FATAL_ERROR ("modulation class unknown: " << modulationClass);

5
src/wifi/model/spectrum-wifi-phy.h
View File

@@ -207,7 +207,7 @@ private:
*/
void UpdateInterferenceHelperBands (void);
Ptr<SpectrumChannel> m_channel; //!< SpectrumChannel that this SpectrumWifiPhy is connected to
Ptr<SpectrumChannel> m_channel; //!< SpectrumChannel that this SpectrumWifiPhy is connected to
Ptr<WifiSpectrumPhyInterface> m_wifiSpectrumPhyInterface; //!< Spectrum PHY interface
Ptr<AntennaModel> m_antenna; //!< antenna model
@@ -215,6 +215,9 @@ private:
bool m_disableWifiReception; //!< forces this PHY to fail to sync on any signal
TracedCallback<bool, uint32_t, double, Time> m_signalCb; //!< Signal callback
double m_txMaskInnerBandMinimumRejection; //!< The minimum rejection (in dBr) for the inner band of the transmit spectrum mask
double m_txMaskOuterBandMinimumRejection; //!< The minimum rejection (in dBr) for the outer band of the transmit spectrum mask
double m_txMaskOuterBandMaximumRejection; //!< The maximum rejection (in dBr) for the outer band of the transmit spectrum mask
};
} //namespace ns3

13
src/wifi/test/wifi-transmit-mask-test.cc
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@@ -98,13 +98,14 @@ WifiOfdmMaskSlopesTestCase::WifiOfdmMaskSlopesTestCase (const char* str, WifiPhy
uint16_t freq = 5170 + (bw / 2); // so as to have 5180/5190/5210/5250 for 20/40/80/160
double refTxPowerW = 1; // have to work in dBr when comparing though
m_tolerance = tol; // in dB
double outerBandMaximumRejection = -40; // in dBr
switch (standard)
{
case WIFI_PHY_STANDARD_80211p:
NS_ASSERT ((bw == 5) || (bw == 10));
freq = 5860;
m_actualSpectrum = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw);
m_actualSpectrum = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw, -20.0, -28.0, outerBandMaximumRejection);
break;
// 11g and 11a
@@ -114,7 +115,7 @@ WifiOfdmMaskSlopesTestCase::WifiOfdmMaskSlopesTestCase (const char* str, WifiPhy
case WIFI_PHY_STANDARD_80211a:
case WIFI_PHY_STANDARD_holland:
NS_ASSERT (bw == 20);
m_actualSpectrum = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw);
m_actualSpectrum = WifiSpectrumValueHelper::CreateOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw, -20.0, -28.0, outerBandMaximumRejection);
break;
// 11n
@@ -122,15 +123,16 @@ WifiOfdmMaskSlopesTestCase::WifiOfdmMaskSlopesTestCase (const char* str, WifiPhy
if (band == WIFI_PHY_BAND_2_4GHZ)
{
freq = 2402 + (bw / 2); //so as to have 2412/2422 for 20/40
outerBandMaximumRejection = -45;
}
NS_ASSERT (bw == 20 || bw == 40);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw, -20.0, -28.0, outerBandMaximumRejection);
break;
// 11ac
case WIFI_PHY_STANDARD_80211ac:
NS_ASSERT (bw == 20 || bw == 40 || bw == 80 || bw == 160);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHtOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw, -20.0, -28.0, outerBandMaximumRejection);
break;
// 11ax
@@ -139,9 +141,10 @@ WifiOfdmMaskSlopesTestCase::WifiOfdmMaskSlopesTestCase (const char* str, WifiPhy
{
NS_ASSERT (bw != 160); // not enough space in 2.4 GHz bands
freq = 2402 + (bw / 2); //so as to have 2412/2422 for 20/40
outerBandMaximumRejection = -45;
}
NS_ASSERT (bw == 20 || bw == 40 || bw == 80 || bw == 160);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw);
m_actualSpectrum = WifiSpectrumValueHelper::CreateHeOfdmTxPowerSpectralDensity (freq, bw, refTxPowerW, bw, -20.0, -28.0, outerBandMaximumRejection);
break;
// other