author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Tue, 06 Jan 2009 13:12:28 +0100 | |
changeset 4038 | c6f634d0fc6f |
parent 3905 | 99c9346b5d71 |
permissions | -rw-r--r-- |
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2005,2006 INRIA |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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*/ |
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#include "error-rate-model.h" |
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namespace ns3 { |
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TypeId ErrorRateModel::GetTypeId (void) |
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{ |
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static TypeId tid = TypeId ("ns3::ErrorRateModel") |
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.SetParent<Object> () |
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; |
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return tid; |
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} |
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double |
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ErrorRateModel::CalculateSnr (WifiMode txMode, double ber) const |
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{ |
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// This is a very simple binary search. |
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double low, high, precision; |
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low = 1e-25; |
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high = 1e25; |
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precision = 1e-12; |
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while (high - low > precision) |
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{ |
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NS_ASSERT (high >= low); |
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double middle = low + (high - low) / 2; |
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if ((1 - GetChunkSuccessRate (txMode, middle, 1)) > ber) |
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{ |
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low = middle; |
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} |
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else |
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{ |
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high = middle; |
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} |
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} |
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return low; |
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} |
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|
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} // namespace ns3 |