The Extended Hata (eHATA) propagation model code was implemented by employees of the National Institute of Standards and Technology (NIST), Communications Technology Laboratory (CTL). The code was written in MATLAB and the latest version of the code can be found at:
https://github.com/usnistgov/eHATA
Version 1.0 release contains the following files and folders:
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README.md: This file.
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ExtendedHata_PropLoss.m: The main function to compute the extended Hata propagation loss.
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ExtendedHata_MedianBasicPropLoss.m: A function to compute median basic transmission loss.
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ExtendedHata_EffHeightCorr.m: A function to compute terminals's "effective height" corrections.
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ExtendedHata_RollingHillyCorr.m: A function to compute "median" and "fine" corrections for rolling hilly terrain.
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ExtendedHata_GeneralSlopeCorr.m: A function to compute general slope of terrain correction.
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ExtendedHata_IsolatedRidgeCorr.m: A function to compute isolated mountain (or isolated ridge) correction.
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ExtendedHata_MixedPathCorr.m: A function to compute mixed land-sea path correction.
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ExtendedHata_LocationVariability.m: A function to compute the standard deviation estimate of the location variability for urban and suburban environments.
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piecelin.m: A function to get piecewise linear interpolation. It can be downloaded at https://www.mathworks.com
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doc: A folder contains a short tutorial explaining how to use the code. Please see [Tutorial] (https://github.com/usnistgov/eHATA/tree/master/doc)
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tests: A folder contains MATLAB scripts and a .mat file used to test each function. Please see [Test scripts] (https://github.com/usnistgov/eHATA/tree/master/tests)
Note, accuracy of the ExtendHata_MedianBasicPropLoss.m function, which is independent of site-specific terrain data, has been validated by comparing with Paul McKenna's results. However, other functions, which depend on site-specific terrain information, has been tested using only a subset of terrain data. These functions might need more testing against reference data.
The folder containing the eHATA code needs to be added to the MATLAB path before use.
This can be accomplished by running the 'addpath' command from the matlab command prompt. For example:
addpath('C:\MATLAB\eHATA')
This software was developed by employees of the National Institute of Standards and Technology (NIST), an agency of the Federal Government. Pursuant to title 17 United States Code Section 105, works of NIST employees are not subject to copyright protection in the United States and are considered to be in the public domain. Permission to freely use, copy, modify, and distribute this software and its documentation without fee is hereby granted, provided that this notice and disclaimer of warranty appears in all copies.
THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT SHALL NASA BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
Distributions of NIST software should also include copyright and licensing statements of any third-party software that are legally bundled with the code in compliance with the conditions of those licenses.
[1] U.S. Department of Commerce, National Telecommunications and Information Administration, 3.5 GHz Exclusion Zone Analyses and Methodology (Jun. 18, 2015), available at http://www.its.bldrdoc.gov/publications/2805.aspx.
[2] Y. Okumura, E. Ohmori, T. Kawano, and K. Fukuda, Field strength and its variability in VHF and UHF land-mobile radio service, Rev. Elec. Commun. Lab., 16, 9-10, pp. 825-873, (Sept.-Oct. 1968).
[3] M. Hata, Empirical formula for propagation loss in land mobile radio services, IEEE Transactions on Vehicular Technology, VT-29, 3, pp. 317-325 (Aug. 1980).
[4] Anita G. Longley, Radio Propagation in Urban Areas, United States Department of Commerce, Office of Telecommunications, OT Report 78-144 (Apr.1978), available at http://www.its.bldrdoc.gov/publications/2674.aspx.