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Remove CB size quantization error in evaluating the error distribution

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This commit is contained in:
Marco Miozzo
2012-01-12 17:40:46 +01:00
parent d373beccf4
commit 2dc5d96c9a
1 changed files with 21 additions and 1 deletions
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22
src/lte/model/lte-mi-error-model.cc
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@@ -31,7 +31,7 @@
#include <stdint.h>
#include "stdlib.h"
#include <ns3/lte-mi-error-model.h>
#include <ns3/lte-amc.h> // for DEBUGing
//#include <ns3/lte-amc.h> // for DEBUGing
@@ -303,7 +303,27 @@ LteMiErrorModel::MappingMiBler (double mib, uint8_t mcs, uint16_t cbSize)
NS_LOG_FUNCTION (" MCS " << (uint16_t)mcs << " TBS " << tbsIndex << " CB size " << cbSize << " CB size curve " << cbMiSizeTable[cbIndex]);
b = bEcrTable[cbIndex][tbsIndex];
if (b<0.0)
{
//take the lowest CB size including this CB for removing CB size
//quatization errors
int i = cbIndex;
while (b<0)
{
b = bEcrTable[i++][tbsIndex];
}
}
c = cEcrTable[cbIndex][tbsIndex];
if (c<0.0)
{
//take the lowest CB size including this CB for removing CB size
//quatization errors
int i = cbIndex;
while (c<0)
{
c = cEcrTable[i++][tbsIndex];
}
}
// see IEEE802.16m EMD formula 55 of section 4.3.2.1
double bler = 0.5*( 1 - erf((mib-b)/(sqrt(2)*c)) );
NS_LOG_FUNCTION ("MIB: " << mib << " BLER:" << bler);