# Behind the Door: Practical Parameterization of Propagation Parameters for IEEE 802.11 ad Use Cases
## 3 Experimental Methodology  
We conducted the measurements within the Faculty of Engineering and Sciences at the Universidad Diego Portales (UDP) in Santiago, Chile. The tested area (Figures 1-3) is an open floor with offices separated by internal partition walls and plaster. In this sense, NLOS-tested links will cross these particleboard interior divisions, and the propagation path (when blocked) will only be obstructed by this material. Note that building materials such as walls and furniture, among others, affect the results. Metallic (iron, steel, copper) desks and chairs will probably create more multipath than wood. Obstacle sizes and shapes will also alter the channel, especially at high-frequency bands like the mm-wave band. Therefore, our results will contribute to the literature by providing empirical data on a use case that has received little attention, being useful to simulate the channel without making assumptions about the angular distribution and power losses. \begin{table}
\begin{tabular}{l c} \hline \hline
**Parameter** & **Description and Value** \\ \hline Mm-wave band development kit & Vubiq V60 WGD03 (AP/STA), Vubiq Networks Incorporated, Irvine, CA, USA \\ Operating frequency & 58.32 GHz \\ Signal generator & Rohde \& Schwarz SMC100A, Rohde \& Schwarz GmbH \& Co KG, Munich, Germany \\ Baseband input signal & Unmodulated continuous wave at 70 MHz \\ Antennas & Horn type, 24 dB Gain, 12\({}^{\circ}\) HPBW \\ AP gain & 26 dB \\ STA gain & 49 dB \\ EIRP & 35 dBm \\ System noise floor & \(-54\) dBm \\ USB power meter resolution & \(<\)1 dB \\ USB power meter noise floor & \(-60\) dBm \\ Angular distribution system & Arduino-controlled Rotary arm \\ Angular resolution & 1.8\({}^{\circ}\) \\ Number of samples per angular position & 1000 \\ Calibration condition & Stationary environment \\ Calibration link length & 2 m \\ Calibration fluctuation & \(<\)1 dB \\ Calibration fading distribution & Rician with K-factor \(>\) 30 dB \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Summary of the experimental setup and parameters. Figure 1: Measurement location of AP and STA in Pos. 5. Figure 3: Diagram of locations and angular profiles of received power (dBm unit) in the STA antenna terminals. Figure 2: Measurement location of STA “hiding” inside office B. The exterior wall of the building is made of reinforced concrete, a standard setting that complies with current seismic building regulations. As shown in Figure 3, the horn antennas at the AP and STA are depicted with a blue triangle. A red arrow relates the polar graph with the STA position tested. Note that we used the following convention for polar coordinates in all the results: \(0^{\circ}\) points to the top of Figure 3. In each polar diagram, the maximum power received at the terminals of the STA antenna is \(-20\) dBm, and the minimum is \(-100\) dBm, with \(20\) dB per division. Finally, the magenta lines represent the case where there are no people in the vicinity of the STA (the case of 'empty room'), while the blue lines show the case where seven people circulate in the area. We designed three representative use cases. The first one describes the distribution of the received power concerning the angle for different LOS/NLOS STA positions. Given that our objective is to model losses caused by physical obstructions (distinct from losses caused by pedestrians), this case is considered a static condition (i.e., without people circulating in the area). The second case replicates the first scenario but includes people inside the offices (one person per office, seated, doing their usual work). For the first two cases, the AP is placed at one end of the corridor, with a fixed orientation toward the other end (see Figures 1 and 2).