[Ns-developers] Release: An accurate physical layer implementation for IEEE 802.11 OFDM
jens.mittag at kit.edu
Sun Sep 12 06:00:55 PDT 2010
after having polished, tested and documented our code base, we,
Stylianos Papanastasiou and Jens Mittag, are finally able to release our
new, detailed and accurate physical layer implementation for OFDM-based
IEEE 802.11 devices.
Our new model is currently called "PhySimWifi" and is a drop-in
replacement for the already existing YansWifiPhy.
Our model requires 2 minor changes in the existing NS-3.9 release,
which, however, do not brake any existing code/logic:
1) The addition of a new method called "GetRelativeVelocity()"
within the class MobilityModel. See the initiated code review under
2) An extension of the method "Enum::MakeEnumChecker()" to allow
more than 12 value parameters. See the initiated code review under
The physical layer model implementation itself is provided as a code
and we are happy to receive your comments. But please be aware that this
is a rather huge code review, including the model itself, about 212
individual test cases, documentation and example scenarios.
The three patch sets can currently also be downloaded as a single patch
or as a full NS-3 package (based on NS-3.9) from
The included manual and documentation (under
src/contrib/physim-wifi/doc/) is available as a PDF and helps you to
understand the architecture and the frame construction, frame reception
and channel modeling processes:
Disclaimer: this model is NOT intended to replace the existing
YansWifiPhy implementation. The above implementation is much slower than
YansWifiPhy. It also does not bring more accuracy in basic scenarios
with only a simple pathloss effect on the wireless channel. As such, it
is supposed to be an alternative to the YansWifiPhy for scenarios, in
which multi-tap channels or Doppler effects have to be modeled.
With kind regards
Jens Mittag, Stylianos Papanastasiou
Dipl.-Inform. Jens Mittag
Karlsruhe Institute of Technology (KIT)
Institute of Telematics
Decentralized Systems and Network Services Research Group
Zirkel 1, 76131 Karlsruhe, Germany
Building 20.20, Room 356.1
Phone: +49 (721) 608 5768
Fax: +49 (721) 608 6789
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