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NYUSIM Application Version 1.6
Last Modification 12/14/17 – Update Notes
Compared with NYUSIM Version 1.5 (v1.5), there are several major new features added to v1.6 for line-of-sight (LOS) environments, angle-of-departure (AoD), angle-of-arrival (AoA), and rural macrocell (RMa) modeling, which are detailed below.
- In the base code package of NYUSIM, a new MATLAB script with the name “NYUSIM_MainCode” is added which acts as the main code of NYUSIM, such that users can obtain all the output figures and data files by setting the input parameters in the main code, and modify channel parameters and output files per users’ own needs, without opening the GUI. The meaning of each parameter is annotated in “NYUSIM_MainCode”.
- For the LOS environment, the first cluster of multipath components sometimes does not put the strongest multipath component as the first arriving component. While strong reflections could cause later arriving multipath component to be stronger than the first arriving multipath component, generally it has been found in the field that the first arriving multipath component will always be the strongest for LOS conditions. Therefore, Version 1.6 swaps (when necessary) the power level of the first arriving multipath component with the strongest multipath component in the first cluster of arriving components to ensure the first arriving multipath component is the strongest for LOS. This provides a realistic physical definition of the first arriving (shortest delay) multipath component in LOS situations. Additionally, Version 1.5 and earlier did not keep track of the boresight angle at the TX or RX, yet standard bodies and researchers need to know the relative angles of all multipath components relative to the boresight, particularly in LOS environments. In Version 1.6, boresight angles are accounted for in the first LOS multipath component, and all other multipath components have angles relative to boresight. The “NYUSIM_MainCode” is documented to show this, and this change was requested by industry users who are performing 5G system simulations.
- The path loss exponent (PLE) in the urban macrocell (UMa) non-line-ofsight (NLOS) scenario is changed from 3.2 to 2.9 to make it more accurate according to the data from extensive measurements presented in “Investigation of prediction accuracy, sensitivity, and parameter stability of large-scale propagation path loss models for5G wireless communications.”
- This change is made inside the GUI code that is inaccessible to users, but is also reflected in “NYUSIM_MainCode” mentioned above that is available to users, where the PLE is represented by the variable n as annotated in the code itself.
- A new input parameter named “Distance Range Option” is added to the GUI in Version 1.6, which has two options: standard (10-500 m) (used in Version 1.5 and earlier versions) and extended (10-10,000 m). The NYUSIM channel model predicts accurate results for standard distance range (10-500 m). The extended distance range beyond 500 m should be set with caution, since NYUSIM is developed based on field measurements within 500 m, as explained in Section 3.1.1 of this user manual. The extended distance range is added based on users’ requests. For the distance range no larger than v 500 m, the dynamic range (i.e., largest possible path loss) is set to 190 dB in NYUSIM based on field measurement results “Millimeter wave mobile communications for 5G cellular: It will work!”, “Wideband millimeter-wave propagation measurements and channel models for future wireless communication system design (Invited Paper)”, “Investigation of prediction accuracy, sensitivity, andparameter stability of large-scale propagation path loss models for 5G wireless communications”, while for the distance range beyond 500 m, the dynamic range is set to 220 dB.
- Another new input parameter named “Base Station Height” is added to the GUI and output data files for the RMa scenario in Version 1.6, which is utilized for calculating path loss in the RMa scenario. This variable name is annotated in the “NYUSIM_MainCode” itself.
- Both LOS and NLOS path loss models in the RMa scenario are modified to incorporate the dependence on the base station height based on Eqs. (21) and (22) in “Rural macrocell path loss models for millimeter wave wireless communications.”
- For the RMa scenario, the number of time clusters and the number of spatial lobes are both set to one, and the maximum number of multipath components is set to two, based on our RMa mmWave field measurements which show sparsity for rural scenarios “Rural macrocell path loss models for millimeter wave wireless communications.”
- In the title or text in output figures, the scenario type (i.e., UMi, UMa, or RMa) is added in addition to the environment type (i.e., LOS or NLOS).
- In the output AoD and AoA spectra, the multipath component with the minimum received power is also shown as a line (it was shown as a dot in the center in previous versions due to a different plotting setting). Furthermore, the view point of the AoD and AoA spectra is changed in Version 1.6 to be along the z-axis, and the legend position is adjusted to avoid overlapping with the spectrum. For the path loss scatter plot, the x-axis is extended to 10 km even if the standard distance range is used.
- The Ricean K-factor is now calculated for every PDP, and is an output parameter in the data file for each simulation run, where the K-factor refers to the ratio of the power of the strongest multipath component in the PDP to the sum of powers of all the other multipath components in the PDP [“Local multipath model parameters for generating 5G millimeterwave 3GPP-like channel impulse response”].
- For Version 1.6, in LOS environments, this will be the ratio of the power of the first arriving multipath component to the sum of powers of all later arriving multipath components. This was suggested by industry users.
- New warning messages are added that will occur when input parameters are not reasonable or exceed their predefined ranges shown on the GUI, as explained in detail in Section 2 of this user manual.
- More references, such as [“Investigation and comparisonof 3GPP and NYUSIM channel models for 5G wireless communications”] and [“5G channel model with improvedaccuracy and efficiency in mmWave bands”], are added in the user manual regarding the comparison between the 3GPP [“Study on channel model for frequencies from 0.5 to 100 GHz”] and NYUSIM channel models, and the significant impact of the choice of channel models on wireless system performance evaluation.
Visit the NYUSIM research page to view key papers related to the simulator.
5G Channel Model with Improved Accuracy and Efficiency in mmWave Bands
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Submittal to NIST 5G Alliance
NYUSIM – User License
Copyright (c) 2017 New York University
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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