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(Database last updated on Mar 27, 2024)
| ID Number | 1901 | |
| Study Type | Engineering & Physics | |
| Model | Transmit power from mobile phones and base stations in France. | |
| Details | Software modified phone handsets were used to record transmit power levels in different areas of Paris, France. Average peak power of the phone when walking was 232 mW (+/- SD 447mW) and when driving the same route ranges from 373 +/- SD 556 mW to 840 +/- SD 709 mW. Abstract: Gabi et al. (2010): The paper deals with the assessment of the exposure to radio-frequency fields induced by mobile networks. The study focuses on the instantaneous relationship between the power transmitted by handsets and that received from the base stations. The power measurements are extrapolated to estimate the exposure. This analysis is based on a set of more than 3.5 million collected samples covering GSM at 900-MHz and 1800-MHz carriers and universal mobile telecommunications system networks at 2100-MHz band. Globally, the study shows that the exchanged powers are much lower than the maximum allowed ones. The duality between the two is highlighted to emphasize that exposure to handsets is higher, whereas exposure to base transceiver station is low and vice versa . In GSM, the exposure from mobiles is shown to be much higher (around 60 dB) than that from base stations. Moreover, although the handset power is adapted depending on the receiving conditions, the analysis shows notable differences between 2G and 3G networks. Indeed, in 3G networks, the highest exposure is not always due to handsets compared to base-station antennas. Based on the presented approach, simple formulations can be derived to take into account real-time public exposure enclosing both devices and base-station contributions. AUTHORS' ABSTRACT: Gati, Wiart et al. 2009 (IEEE #6640): The objective of this study is to investigate the transmitted (Tx) power of 3G terminals during real use. Such analysis reveals the exposure induced by mobile phone devices and provides a precise idea about the margin between time averaged and maximum (standardized) exposure. For this purpose, data streams exchanged on a live network were recorded and processed to extract a histogram of received power at the handset in indoor, outdoor, rural, and urban environments. The real Tx power is found to be generally a few percents of the maximum power. Moreover, the influences of some main factors like the handset model and the usage mode are investigated. A data mode for example increases the Tx power of about 6 dB compared to a voice call. |
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| Findings | Not Applicable to Bioeffects | |
| Status | Completed With Publication | |
| Principal Investigator | France Telecom, France | |
| Funding Agency | France Telecom/CNET | |
| Country | FRANCE | |
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