DOI: 10.5281/zenodo.7640352
title: Measurement-based MIMO channel model at 140GHz

description: 1. Introduction

The file “gen_dd_channel.zip” is a package of a wideband multiple-input multiple-output (MIMO) stored radio channel model at 140 GHz in indoor hall, outdoor suburban, residential and urban scenarios. The package consists of 1) measured wideband double-directional multipath data sets estimated from radio channel sounding and processed through measurement-based ray-launching and 2) MATLAB code sets that allows users to generate wideband MIMO radio channels with various antenna array types, e.g., uniform planar and circular arrays at link ends.

2. What does this package do?

Outputs of the channel model

The MATLAB file “ChannelGeneratorDD_hexax.m” gives the following variables, among others. The .m file also gives optional figures illustrating antennas and radio channel responses.






Variables



Descriptions





CIR



MIMO channel impulse responses





CFR



MIMO channel frequency responses





Inputs to the channel model

In order for the MATLAB file “ChannelGeneratorDD_hexax.m” to run properly, the following inputs are required.






Directory



Descriptions





data_030123_double_directional_paths



Double-directional multipath data, measured and complemented by ray-launching tool, for various cellular sites.





User’s parameters

When using “ChannelGeneratorDD_hexax.m”, the following choices are available.






Features



Choices





Channel model types for transfer function generation







'snapshot': single time sample per link = static, random phase for each path, amplitude from measurements


'virtualMotion': Doppler shifts & temporal fading, static propagation parameters, random phase for each path, amplitude from measurements, Doppler frequency per path from AoA and velocity vector






Antenna / beam shapes







'single3GPP': single antenna element with power pattern shape defined in 3GPP, adjustable HPBW etc.




'URA': uniform rectangular array, omni-directional elements


'UCA': uniform circular array, omni-directional elements






List of files in the dataset

MATLAB codes that implement the channel model

The MATLAB files consist of the following files.






File and directory names



Descriptions





readme_100223.txt



Readme file; please read it before using the files





ChannelGeneratorDD_hexax.m



Main code to run; a code to integrate antenna arrays and double-directional path data to derive MIMO radio channels. No need to see/edit other files.





gen_pathDD.m, randl.m, randLoc.m



Sub-routines used in ChannelGeneratorDD_hexax.m; no need of modifications.





Hexa-X channel generator DD_presentation.pdf



User manual of ChannelGeneratorDD_hexax.m.





 

Measured multipath data

The directory "data_030123_double_directional_paths" in the package contains the following files.






Filenames



Descriptions





readme_100223.txt



Readme file; please read it before using the files





RTdata_[scenario]_[date].mat



Containing double-directional multipath parameters at 140 GHz in the specified scenario, estimated from radio channel sounding and ray-tracing.





description_of_data_dd_[scenario].pdf



Explaining data formats, the measurement site and sample results.





References

Details of the data set are available in the following two documents:

The stored channel models

A. Nimr (ed.), "Hexa-X Deliverable D2.3 Radio models and enabling techniques towards ultra-high data rate links and capacity in 6G," April 2023, available: https://hexa-x.eu/deliverables/

@misc{Hexa-XD23,    author    = {{A. Nimr (ed.)}},    title     = {{Hexa-X Deliverable D2.3 Radio models and enabling techniques towards ultra-high data rate links and capacity in 6G}},    year     = {2023},    month    = {Apr.},     howpublished               = {https://hexa-x.eu/deliverables/},}

Derivation of the data, i.e., radio channel sounding and measurement-based ray-launching

M. F. De Guzman and K. Haneda, "Analysis of wave-interacting objects in indoor and outdoor environments at 142 GHz," IEEE Transactions on Antennas and Propagation, vol. 71, no. 12, pp. 9838-9848, Dec. 2023, doi: 10.1109/TAP.2023.3318861

@ARTICLE{DeGuzman23_TAP,  author={De Guzman, Mar Francis and Haneda, Katsuyuki},  journal={IEEE Transactions on Antennas and Propagation},   title={Analysis of Wave-Interacting Objects in Indoor and Outdoor Environments at 142 {GHz}},   year={2023},  volume={71},  number={12},  pages={9838-9848},}

Finally, the code “randl.m” are from the following MATLAB Central File Exchange.

Hristo Zhivomirov (2023). Generation of Random Numbers with Laplace Distribution (https://www.mathworks.com/matlabcentral/fileexchange/53397-generation-of-random-numbers-with-laplace-distribution), MATLAB Central File Exchange. Retrieved February 15, 2023.

Data usage terms

Any usage of the data must be upon consent on the following conditions:



The file “ChannelGeneratorDD_hexax.m” is owned by OUL. Contact: Dr. Pekka Kyösti, Pekka.Kyosti@oulu.fi.

The other files and those in the directories, except for “randl.m”, are owned by AAU. Contact: Mr. Mar Francis de Guzman, francis.deguzman@aalto.fi.

When a scientific paper is published that exploits the data and code, please cite this data set; the citation can be downloaded from the zenodo page of this data set.