Large-scale Outdoor Cell-free mMIMO Channel Measurement in an Urban Scenario at 3.5 GHz
The design of cell-free massive MIMO (CF-mMIMO) systems requires accurate, measurement-based channel models. This paper provides the first results from the by far most extensive outdoor measurement campaign for CF-mMIMO channels in an urban environment. We measured impulse responses between over 20, 000 potential access point (AP) locations and 80 user equipments (sUEs) at 3.5 GHz with 350 MHz bandwidth (BW). Measurements use a “virtual array” approach at the AP and a hybrid switched/virtual approach at the UE. This paper describes the sounder design, measurement environment, data processing, and sample results, particularly the evolution of the power-delay profiles (sPDPs) as a function of the AP locations, and its relation to the propagation environment.
Authors
- Tyler Chen (ORCID: https://orcid.org/0000-0002-1187-1026)
- Hussein Hammoud (ORCID: https://orcid.org/0000-0002-8400-4249)
- Thomas Choi (ORCID: https://orcid.org/0000-0001-5900-9526)
- Masaaki Ito (ORCID: https://orcid.org/0000-0002-7832-4406)
- Kelvin Arana (ORCID: https://orcid.org/0000-0002-7158-1135)
- Bowei Wu (ORCID: https://orcid.org/0000-0002-6536-8020)
- Andreas F. Molisch (ORCID: https://orcid.org/0000-0002-4779-4763)
- Tianyi Yang (ORCID: https://orcid.org/0000-0002-7560-7152)
- Issei Kanno
- Jorge Gomez‐Ponce (ORCID: https://orcid.org/0000-0003-4697-4524)
- Ishita Vasishtha
- Yuning Zhang (ORCID: https://orcid.org/0000-0002-1595-5067)
- Zihang Cheng (ORCID: https://orcid.org/0000-0002-5869-2754)
- Linyu Sun
- Haoyu Xie (ORCID: https://orcid.org/0000-0001-9967-0626)
- Ashwani Pradhan
- P. V. Krishna
Institutions
- University of Southern California (US)
- KDDI Research (Japan) (JP)
Publication Details
- Published
- 2024-10-07
- DOI
- https://doi.org/10.1109/vtc2024-fall63153.2024.10757762
- Citations
- 2
- Primary Topic
- Advanced MIMO Systems Optimization
- Type
- article
- Field-Weighted Citation Impact
- 0.42
Funders
- National Science Foundation