Abstract
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 contribution | En geometrisk baseret vertikal forstærkningskorrektion til signalstyrkeprediktion af tiltede basestationsantenner i bymæssige omgivelser |
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Original language | English |
Title of host publication | 2012 IEEE Vehicular Technology Conference (VTC Fall) |
Number of pages | 5 |
Publisher | IEEE Press |
Publication date | 6 Sept 2012 |
Pages | 1-5 |
ISBN (Print) | 978-1-4673-1879-2 |
ISBN (Electronic) | 978-1-4673-1880-8 |
DOIs | |
Publication status | Published - 6 Sept 2012 |
Event | IEEE Vehicular Technology Conference - Québec City, Canada Duration: 3 Sept 2012 → 6 Sept 2012 Conference number: 76th |
Conference
Conference | IEEE Vehicular Technology Conference |
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Number | 76th |
Country/Territory | Canada |
City | Québec City |
Period | 03/09/2012 → 06/09/2012 |
Series | I E E E V T S Vehicular Technology Conference. Proceedings |
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ISSN | 1550-2252 |
Keywords
- Antenna
- LTE
- Path loss
- Vertical Gain Correction