mm-Wave Dual-Band Channel Sounding Dataset

Dataset Overview

This dataset was collected by the Radio Signal Processing Laboratory at Niigata University as part of dual-band channel measurement campaigns in urban macro-cell (UMa) and micro-cell (UMi) environments in Yokohama City, Japan. Three areas were covered: Yuraku, NTTCom, and World Porters (WP) — the same urban access environments used for the Sub-6GHz MIMO Channel Sounding campaign.

Double-directional channel measurements were conducted simultaneously at 24 GHz and 60 GHz using a custom-built mm-wave channel sounder, capturing the angular and delay characteristics of the propagation channel in both LoS and NLoS conditions.

Measurement Setup

Measurement Areas

Measurement Method

Channel measurements were conducted using a custom-built 24/60-GHz dual-band double-directional (D-D) channel sounder based on commercial off-the-shelf (COTS) phased array RF transceivers (SIVERS IMA). The system acquires double-directional channel data over the full 360° azimuth range at both frequencies simultaneously.

Channel Sounder System

Full Azimuth (360°) Sweep

Each phased array covers a 90° sector. By rotating both TX and RX arrays through four cardinal orientations (N, E, S, W), a full 360° double-directional angular sweep is achieved. One complete measurement cycle takes approximately 5 minutes per RX point.

OTA Calibration

Over-the-air (OTA) calibration is applied to remove the combined frequency response of the TX and RX chains, including phased array antenna characteristics, yielding calibrated channel transfer functions (CTFs).

Post-Processing

Multipath components (MPCs) — delay, angle-of-departure (AoD), angle-of-arrival (AoA), and power — are extracted from the multi-dimensional channel impulse response (MDCIR) using a multi-dimensional sub-grid CLEAN algorithm. MPC clustering is then performed with a K-PowerMeans (KPM) algorithm applied jointly to the 24 GHz and 60 GHz datasets, yielding common clusters (present at both frequencies) and uncommon clusters (present at one frequency only).

Dual-band joint clustering: 24 GHz and 60 GHz MPC datasets are composed and clustered jointly.

Channel Sounder Hardware

TX (left) and RX (right) units mounted on carts. Each cart carries a 24-GHz and 60-GHz phased array with a 360° camera on top.

Field Measurement

RX cart positioned at a static measurement point in the urban street environment (Yokohama, Japan).

Citation

If you use this dataset in your research, please cite the following paper:

@article{tsukada2025millimeter,
  author  = {Tsukada, Hibiki and Suzuki, Naoya and
             Bag, Banibrata and Takahashi, Riku and
             Kim, Minseok},
  title   = {{Millimeter-Wave Urban Cellular Channel
             Characterization and Recipe for
             High-Precision Site-Specific Channel
             Simulation}},
  journal = {IEEE Transactions on Vehicular Technology},
  volume  = {74},
  number  = {3},
  pages   = {3598--3612},
  year    = {2025},
  doi     = {10.1109/TVT.2024.3492719}
}

@article{suzuki2024spatial,
  author  = {Suzuki, Naoya and Tsukada, Hibiki and
             Takahashi, Riku and Bag, Banibrata and
             Kim, Minseok},
  title   = {{Characterization of Spatial Consistency
             of Cluster Channels in Urban Environments
             at 24 and 60 GHz}},
  journal = {IEEE Antennas Wireless Propag. Lett.},
  volume  = {23},
  number  = {5},
  pages   = {1583--1587},
  year    = {2024},
  doi     = {10.1109/LAWP.2024.3363191}
}

@inproceedings{tsukada2022dual,
  author    = {Tsukada, Hibiki and Suzuki, Naoya and
               Takahashi, Riku and Kim, Minseok},
  title     = {{24/60-GHz Dual-Band Double-Directional
               Channel Measurements in Urban Cellular
               Access Environments}},
  booktitle = {Proc. Int. Symp. Antennas Propag. (ISAP)},
  year      = {2022},
  month     = {Oct.--Nov.}
}

@inproceedings{kim2022icc,
  author    = {Kim, Minseok and Tsukada, Hibiki and
               Kumakura, Keiichiro and Takahashi, Riku and
               Suzuki, Naoya and Sawada, Hirokazu and
               Matsumura, Takeshi},
  title     = {{A 24/60-GHz Dual-Band Double-Directional
               Channel Sounder Using COTS Phased Arrays}},
  booktitle = {Proc. IEEE ICC Workshops},
  year      = {2022},
  doi       = {10.1109/ICCWorkshops53468.2022.9814563}
}

@inproceedings{kim2025aps,
  author    = {Kim, Minseok},
  title     = {{24/60 GHz Dual-Band Synchronized Directional
               Channel Measurements Using COTS Phased Arrays
               in Urban Cellular Environments}},
  booktitle = {Proc. IEEE AP-S/CNC-USNC-URSI},
  year      = {2025},
  doi       = {10.1109/AP-S/CNC-USNC-URSI55537.2025.11266374}
}

Related Publications

• IEEE TVT 2025
  H. Tsukada, N. Suzuki, B. Bag, R. Takahashi, M. Kim, "Millimeter-Wave Urban Cellular Channel Characterization and Recipe for High-Precision Site-Specific Channel Simulation," IEEE Trans. Veh. Technol., vol. 74, no. 3, pp. 3598–3612, Mar. 2025.
  DOI Link
• IEEE AP-S 2025
  M. Kim, "24/60 GHz Dual-Band Synchronized Directional Channel Measurements Using COTS Phased Arrays in Urban Cellular Environments," Proc. IEEE AP-S/CNC-USNC-URSI, 2025.
  DOI Link
• IEEE LAWP 2024
  N. Suzuki, H. Tsukada, R. Takahashi, B. Bag, M. Kim, "Characterization of Spatial Consistency of Cluster Channels in Urban Environments at 24 and 60 GHz," IEEE Antennas Wireless Propag. Lett., vol. 23, no. 5, pp. 1583–1587, 2024.
  DOI Link
• ISAP 2022
  H. Tsukada, N. Suzuki, R. Takahashi, M. Kim, "24/60-GHz Dual-Band Double-Directional Channel Measurements in Urban Cellular Access Environments," Proc. ISAP 2022, Oct.–Nov. 2022.
• ICC Workshops 2022
  M. Kim, H. Tsukada, K. Kumakura, R. Takahashi, N. Suzuki, H. Sawada, T. Matsumura, "A 24/60-GHz Dual-Band Double-Directional Channel Sounder Using COTS Phased Arrays," Proc. IEEE ICC Workshops, 2022.
  DOI Link