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Unified Diff: src/contrib/physim-wifi/test/physim-wifi-convolutional-test.cc

Issue 2173042: NS-3: New and accurate physical layer for IEEE 802.11 OFDM called PhySim-WiFi
Patch Set: Created 13 years, 6 months ago
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Index: src/contrib/physim-wifi/test/physim-wifi-convolutional-test.cc
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/contrib/physim-wifi/test/physim-wifi-convolutional-test.cc
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 Jens Mittag, Stylianos Papanastasiou
+ *
+ * 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
+ *
+ * Authors:
+ * Jens Mittag <jens.mittag@kit.edu>
+ * Stylianos Papanastasiou <stylianos@gmail.com>
+ */
+
+#include <itpp/itcomm.h>
+#include "ns3/config.h"
+#include "ns3/log.h"
+#include "ns3/boolean.h"
+#include "ns3/double.h"
+#include "ns3/uinteger.h"
+#include "ns3/object-factory.h"
+#include "ns3/physim-helper.h"
+#include "ns3/random-variable.h"
+#include "physim-wifi-convolutional-test.h"
+
+using namespace ns3;
+
+NS_LOG_COMPONENT_DEFINE ("PhySimWifiConvolutionalTest");
+
+PhySimWifiConvolutionalTest::PhySimWifiConvolutionalTest ()
+ : TestCase ("PhySim WiFi convolutional test case")
+{
+ m_convolutional = CreateObject<PhySimConvolutionalEncoder> ();
+}
+
+PhySimWifiConvolutionalTest::~PhySimWifiConvolutionalTest ()
+{
+}
+
+bool
+PhySimWifiConvolutionalTest::DoRun (void)
+{
+ SetErrorStatus (false);
+
+ bool success;
+
+ // Provide known seed for predictable results
+ SeedManager::SetSeed (1);
+
+ WifiCodeRate rate[] = { WIFI_CODE_RATE_1_2, WIFI_CODE_RATE_2_3, WIFI_CODE_RATE_3_4};
+ std::string description[] = { "1/2 Coding Rate","2/3 Coding Rate", "3/4 Coding Rate"};
+
+ for (int i = 0; i < 3; ++i)
+ {
+ success = RunSingle (rate[i]);
+ if (!success)
+ {
+ NS_LOG_DEBUG ("FAIL: Convolutional test for" << description[i]);
+ }
+ else
+ {
+ NS_LOG_DEBUG ("PASS: Convolutional test for " << description[i]);
+ }
+ NS_TEST_ASSERT_MSG_EQ ( success, true, "Convolutional test failed for " << description[i] << " : Input bits before encoding and output bits after de-coding do not match");
+ }
+
+ success = RunAnnexG ();
+ if (!success)
+ {
+ NS_LOG_DEBUG ("FAIL: Convolutional test for input as in standard annex G");
+ }
+ else
+ {
+ NS_LOG_DEBUG ("PASS: Convolutional test for input as in standard annex G");
+ }
+ NS_TEST_ASSERT_MSG_EQ ( success, true, "Convolutional test failed as encoded bits do not match standard annex G");
+
+ return false;
+}
+
+bool
+PhySimWifiConvolutionalTest::RunSingle (WifiCodeRate rate)
+{
+ // create some random bits
+ itpp::bvec bits = itpp::randb (144);
+ m_convolutional->SetCodingRate (rate);
+ itpp::bvec encodedBits = m_convolutional->Encode (bits);
+ itpp::bvec decodedBits = m_convolutional->Decode (to_vec (encodedBits));
+ return (decodedBits == bits);
+}
+
+// Verify encoder against the example in the standard annex G
+bool
+PhySimWifiConvolutionalTest::RunAnnexG (void)
+{
+ // Table G.16 -- First 144 Bits After scrambling
+ const itpp::bvec
+ first144BitsAfterScrambling =
+ "0 1 1 0 1 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 0 1 1 0 0 0 1 1 1 1 0 1 1 0 1 0 0 0 0 0 1 0 0 0 0 1 1 1 1 1 0 1 0 0 1 0 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 0 1 1 1 1 1 1 0 1 0 1 1 1 1 0 1 0 1 1 1 0 0 0 1 0 0 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 1 1 1 0 1 0 1 1 1 0 0 1 0 0 1 0 1 1 1 1 0 0";
+ // Table G.18 -- Coded bits of first DATA symbol
+ const itpp::bvec
+ encoded192Bits =
+ "0 0 1 0 1 0 1 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 1 1 1 0 1 1 0 1 1 0 1 0 1 1 0 0 1 1 0 1 0 0 0 0 1 1 1 0 1 0 1 0 0 1 0 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 1 1 1 0 0 1 1 1 1 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 0 0 0 1 1 0 1 0 0 1 1 1 1 1 0 1 0 1 1 1 0 1 1 0 0 1 0";
+ m_convolutional->SetCodingRate (WIFI_CODE_RATE_3_4);
+ itpp::bvec encodedBits = m_convolutional->Encode (first144BitsAfterScrambling);
+ return (encodedBits == encoded192Bits);
+}

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