研究目的
To explore the underutilized millimeter wave (mm-wave) frequency spectrum for future broadband cellular communication networks and understand cellular mm-wave propagation in densely populated indoor and outdoor environments.
研究成果
The research demonstrates that 28 and 38 GHz frequencies can be effectively used for future 5G cellular networks with steerable directional antennas, achieving consistent coverage within a 200-meter cell radius. The study provides valuable propagation data and models for urban environments, supporting the development of mm-wave cellular communications.
研究不足
The study is limited by the specific urban environments of New York City and Austin, Texas, and may not fully represent all possible mm-wave propagation scenarios. Additionally, the maximum measurable path loss and dynamic range of the equipment could limit the detection of very weak signals.
1：Experimental Design and Method Selection:
Utilized a 400 Mcps sliding correlator channel sounder with
2：3 ns multipath resolution for mm-wave propagation measurements at 28 GHz in New York City and an 800 MHz null-to-null bandwidth spread spectrum sliding correlator channel sounder for 38 GHz propagation measurements in Austin. Sample Selection and Data Sources:
Selected TX and RX measurement locations in urban environments around NYU campuses in Manhattan and Brooklyn for 28 GHz and at the University of Texas main campus for 38 GHz.
3：List of Experimental Equipment and Materials:
Included steerable directional antennas, pseudo-random noise (PN) sequence sliding correlator, and various horn antennas with different beamwidths and gains.
4：Experimental Procedures and Operational Workflow:
Conducted penetration and reflection measurements for common materials, path loss and signal outage analysis, AOA and AOD analysis, and small scale fading studies.
5：Data Analysis Methods:
Analyzed path loss, RMS delay spread, and multipath components using statistical techniques and linear models.
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