Welcome to the TU Wien's Institute of Telecommunications' LTE Advanced simulator page. Here you will be able to get the last available version of the in-house developed, Matlab-based Downlink Physical Layer (Link Level) simulator.

The simulators are released under the terms of an academic, non-commercial use license. Please read the license agreement in case of doubt.

If you are experiencing problems with downloading or using the simulator please contact Stefan Schwarz , Josep Colom Ikuno or Michal Šimko.

For questions please check our forum, where you will be able to post your questions/comments/bug reports.

The main file of the LTE Downlink Link Level Simulator is LTE_sim_main.m, though you may normally run the simulation through a batch file such as LTE_sim_batch.m, which performs the following tasks:

1. Setting the SNR range for the simulation.
2. Loading a configuration file.
3. Executing the LTE_sim_main.m main simulation file.
4. Saving the results to a file.

The simulator allows for the following settings to be adjusted (please check the documentation for a complete list):

• Number of User Equipments (UEs) attached to the eNodeB.
• Uplink delay
• Number of frames to simulate
• SNR
• transmit and receive antenna numbers
• channel model
• transmit mode (as defined by the standard)
• scheduling algorithm

The released package also contains examples on how to use the simulator and plot its results.

A short note on sampling frequency: all LTE devices are required to work with 20MHz, thus they always sample with the 30.7MHz that are required in that case. Our simulator is working with the sampling frequency matched to the actual bandwidth. We are doing this to reduce the complexity of the simulation. If desired, a simulation with larger sampling frequency can be implemented easily.

The LTE-A Link Level Simulator is under constant development and as such, new features are planned to be added. For a complete list of all the functionalities, please refer to the documentation included with the simulator.

The LTE-A Downlink Link Level Simulator contains code from the following sources:

• Iterative Solutions Coded Modulation Library (ISCML). An open source toolbox for simulating capacity approaching codes in Matlab. It is licensed as free software under the lesser GPL license.
• pycrc. A free, easy to use Cyclic Redundancy Check (CRC) calculator and source code generator. pycrc and its generated code are licensed under the MIT license.

In contrast to the Vienna LTE Link Level Simulator, we will not provide direct download access to the Vienna LTE-A Link Level Simulator, in order to have more control and knowledge about who is downloading and utilizing our simulator. As the simulator is under a non-commercial academic-use license, we want to avoid it being utilized by companies without us knowing about.

If you are an academic researcher or student, you can get free access to the simulator by mailing  out the following form and submitting it to  Univ.Prof. Markus Rupp. Please do follow the following steps:

1. Print it on letterhead of the university department or research institute, (i.e. "official paper" of your institution, where the logo of your institution is also placed).
2. Have it signed by the department head, including date and stamp of the department,
3. Scan it and, including the above, email it to: Univ.Prof. Markus Rupp (mrupp(at)nt.tuwien.ac.at).

If you are working in a company and still want to use the simulator please contact Univ.Prof. Markus Rupp. 

There is currently no paper published, describing the features of the LTE-A simulator, but there exist several papers about the structure and purpose of its predecessor, the Vienna LTE Link Level Simulator.

A version of the latest paper on the Vienna LTE Link Level Simulator can be found here.

If you are using the simulator for your scientific work, please use the refence below:

Relevant Publications (from publication database)

This work has been funded by A1 Telekom Austria AG and the Christian Doppler Laboratory for Design Methodology of Signal Processing Algorithms.