A Geometrical-based Vertical Gain Correction for Signal Strength Prediction of Downtilted Base Station Antennas in Urban Areas

Ignacio Rodriguez, Huan Cong Nguyen, Troels Bundgaard Sørensen, Jan Elling, Morten B. Gentsch, Mads Sørensen, Lauri Kuru, Preben Mogensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

15 Citations (Scopus)
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Base station antenna downtilt is one of the most important parameters for optimizing a cellular network with tight frequency reuse. By downtilting, inter-site interference is reduced, which leads to an improved performance of the network. In this study we show that a simple geometrical-based extension to standard empirical path loss prediction models can give quite reasonable accuracy in predicting the signal strength from tilted base station antennas in small urban macro-cells. Our evaluation is based on measurements on several sectors in a 2.6 GHz Long Term Evolution (LTE) cellular network, with electrical antenna downtilt in the range from 0 to 10 degrees, as well as predictions based on ray-tracing and 3D building databases covering the measurement area. Although the calibrated ray-tracing predictions are highly accurate compared with the measured data, the combined LOS/NLOS COST-WI model with downtilt correction performs similarly for distances above a few hundred meters. Generally, predicting the effect of base station antenna tilt close to the base station is difficult due to multiple vertical sidelobes.
Translated title of the contributionEn geometrisk baseret vertikal forstærkningskorrektion til signalstyrkeprediktion af tiltede basestationsantenner i bymæssige omgivelser
Original languageEnglish
Title of host publication2012 IEEE Vehicular Technology Conference (VTC Fall)
Number of pages5
PublisherIEEE Press
Publication date6 Sep 2012
ISBN (Print)978-1-4673-1879-2
ISBN (Electronic)978-1-4673-1880-8
Publication statusPublished - 6 Sep 2012
EventIEEE Vehicular Technology Conference - Québec City, Canada
Duration: 3 Sep 20126 Sep 2012
Conference number: 76th


ConferenceIEEE Vehicular Technology Conference
CityQuébec City
SeriesI E E E V T S Vehicular Technology Conference. Proceedings


  • Antenna
  • LTE
  • Path loss
  • Vertical Gain Correction


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