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• W4240464287 abstract "Abstract The aim of this work is to study the impact of small receiver displacement on a signal propagation in a typical conference room environment at a millimeter wave (mmWave) frequency of 60 GHz. While channel measurements provide insights on the propagation phenomena, their use for the wireless system performance evaluation is challenging. Whereas, carefully executed three dimensional ray tracing (RT) simulations represent a more flexible option. Nevertheless, a careful validation of simulation methodology is needed. The first target of this paper is to highlight the benefits of an in-house built three dimensional RT tool at 60 GHz, and show the effectiveness of simulations in predicting different characteristics of the channel. To validate the simulation results against the measurements, two different transmitter (Tx) positions and antenna types along with ten receiver (Rx) positions are considered in a typical conference room. In first system configuration, an omnidirectional antenna is placed in the middle of the table, while in the second system configuration a directed horn antenna is located in the corner of the meeting room. After validating the simulation results with the measurement data, in the second part of this work, the impact of a small change i.e. 20 cm in the receiver position, is studied. To characterize the impact we apply as performance indicators the received power level, root mean square delay spread (RMS-DS), and RMS angular spread (RMS-AS). The channel characteristics is considered with respect to the direct orientation (DO) i.e., the Rx antenna is directed towards the Tx antenna. Different antenna configurations at the TX and Rx side are applied to highlight the role of antenna properties on the considered channel characteristics. The validation of results show RMS errors of only 2 - 3 dB between the measured and simulated received power levels for different Tx configurations in the direction of DO. Results indicate that only a small change of the Rx position may result as a large difference in the received power level even though a line-of-sight between Tx and Rx occurs. In the considered conference room, the average standard deviation (STD) of the received power was found to be around 6:5 dB and up to 9:5 dB for directed and omnidirectional antennas, respectively. As can be expected, directed antennas offer lower value of RMS-DS and RMS-AS compared to omnidirectional antennas." @default.
• W4240464287 created "2022-05-12" @default.
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• W4240464287 date "2020-11-12" @default.
• W4240464287 modified "2023-09-29" @default.
• W4240464287 title "A Study About Signal Variation with Minor Receiver Displacement in a Meeting Room at 60 GHz: Measurements and Simulations" @default.
• W4240464287 doi "https://doi.org/10.21203/rs.3.rs-104016/v1" @default.
• W4240464287 hasPublicationYear "2020" @default.
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