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https://github.com/passcod/splash

đź’¦ RF Signal Propagation analysis tool (eventually). Learning project (currently)
https://github.com/passcod/splash

longley-rice splat

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đź’¦ RF Signal Propagation analysis tool (eventually). Learning project (currently)

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README 

        
# Splash



**[SPLAT!]** is a wonderful tool for RF analysis over terrain. Unfortunately,

it only works with a few terrain sources and only uses one core for processing.



[SPLAT!]: http://www.qsl.net/kd2bd/splat.html



**Splash** is three things, in this order:



1. A learning project to teach myself about the maths and physics underlying

   the [Longley-Rice] Irregular Terrain Model (ITM) as I go about porting it to

   Rust.

2. A learning project to teach myself deep optimisation over modern hardware,

   using at least SIMD and hopefully GPU to dramatically improve modelisation

   performance.

3. A production-grade interface to the ITM, and eventually other models.



[Longley-Rice]: https://en.wikipedia.org/wiki/Longley%E2%80%93Rice_model



## Porting goals



 - Not merely a port of the C++ port of the FORTRAN original, but a full

   refactor, with all functions and variables named sensibly.

 - Everything thoroughly documented inline, with the minor goal that one should

   be able to understand (at a high level) how the ITM works “simply” by

   reading Splash’s source.

 - 1950-era approximations replaced by exact versions for math functions where

   possible.

 - Entirely safe code.

 - Separation of preparation and execution routines.



## Research and papers



### Longley-Rice ITM



 - [The Irregular Terrain Model]: FORTRAN implementation with descriptions (NTIA 2002)

 - [Hufford 1995]: The (ITM) Algorithm, v1.2.2

 - [Hufford-Longley-Kissick 1982]: A Guide to the Use of the ITM

 - [McKenna 2016]: Propagation Measurement Workshop (Slides)



### Background



 - [Norton 1959]: Transmission Loss in Radio Propagation II

 - [Handbook on Ground Wave Propagation]: Edition of 2014 (ITU Radiocommunication Bureau)

 - [Phillips 2012]: Geostatistical Techniques for Practical Wireless Network Coverage Mapping



### Parallel ITM



 - [Song 2011]: Parallel Implementation of the Irregular Terrain Model (ITM) for Radio Transmission Loss Prediction Using GPU and Cell BE Processors

 - [Musselman 2013]: An OpenCL Implementation of the Irregular Terrain with Obstructions Model (ITWOM)



### Accuracy studies



 - [Sun 2015]: Propagation Path Loss Models for 5G Urban Micro-and Macro-Cellular Scenarios

 - [Sun 2016]: Investigation of Prediction Accuracy, Sensitivity, and Parameter Stability of Large-Scale Propagation Path Loss Models for 5G Wireless Communications

 - [Abhayawardhana 2005]: Comparison of Empirical Propagation Path Loss Models for Fixed Wireless Access Systems



### Other models or improvements



 - [El-Sallabi 2011]: Terrain Partial Obstruction LOS Path Loss Model for Rural Environments

 - [Phillips 2012]: Geostatistical Techniques for Practical Wireless Network Coverage Mapping

 - [MacCartney 2017]: Rural Macrocell Path Loss Models for Millimeter Wave Wireless Communications



[The Irregular Terrain Model]: https://www.its.bldrdoc.gov/media/50674/itm.pdf

[Hufford 1995]: https://www.its.bldrdoc.gov/media/50676/itm_alg.pdf

[Hufford-Longley-Kissick 1982]: https://www.ntia.doc.gov/files/ntia/publications/ntia_82-100_20121129145031_555510.pdf

[McKenna 2016]: https://www.its.bldrdoc.gov/resources/workshops/propagation-measurement-workshops-webinars.aspx

[Norton 1959]: https://nvlpubs.nist.gov/nistpubs/Legacy/TN/nbstechnicalnote12.pdf

[Handbook on Ground Wave Propagation]: https://www.itu.int/dms_pub/itu-r/opb/hdb/R-HDB-59-2014-PDF-E.pdf

[Phillips 2012]: https://core.ac.uk/display/54849067

[Song 2011]: https://ieeexplore.ieee.org/document/5680900/

[Musselman 2013]: https://github.com/amusselm/Parallel-LRP/blob/master/documents/report.pdf

[Sun 2016]: https://arxiv.org/abs/1603.04404

[Sun 2015]: https://arxiv.org/abs/1511.07311

[Abhayawardhana 2005]: https://ieeexplore.ieee.org/document/1543252

[El-Sallabi 2011]: https://ieeexplore.ieee.org/document/5701648

[MacCartney 2017]: https://ieeexplore.ieee.org/document/7914696