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Diyarbakır İl Merkezi’nde UMTS bandının mobil ölçümü ve istatistiksel analizi

Mobile measurement of UMTS band in the city center of Diyarbakir and its statistical analysis

Journal Name:

  • Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
Very rapid technological developments in mobile communication systems have been observed. Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) such as second and third generation mobile communication systems are used more widely with time. This also causes an increase in electromagnetic field exposure level in the external environment. In this study, the electric field strength radiated by UMTS band were measured as mobile on the main streets in the city center of Diyarbakır during a week. Then, the measurement results obtained were analyzed statistically. In addition to that, mobile measurement results of UMTS band for a day were shown as two and three dimensional on the maps. Mobile measurements were carried out using spectrum analyzer, three-axis electric field antenna, connection cables and a laptop which was used to record the mobile measurement results. The portable spectrum analyzer was used to measure the high frequency electromagnetic fields. The frequency range of three axis electric field antenna is from 27 MHz to 3 GHz, dynamic range 0.2 mV/m–200 V/m and maximum extended measurement uncertainty +2.6 / ̵ 3.8 dB for 85–2200 MHz. Connection cable is 1.5 m long and contains ferrite to decrease the effects of the external fields. The portable spectrum analyzer equipped with three-axis electric field antenna was mounted on the top of the car. Antenna was placed at 1.70 m height above ground. Measurements were performed as mobile on the main streets. Average speed of the car in the mobile measurement route was about 40 km/h. It was measured that the highest instantaneous electric field strength value was 6.0900 V/m and the lowest instantaneous electric field strength value was 0.0724 V/m in these mobile measurements. Besides that, according to mean electric field strength values, the highest average value was measured as about 0.6281 V/m on Wednesday and the lowest average value was measured as about 0.5936 V/m on Monday. The highest variation in standard deviation and variance was observed on Wednesday. In addition to that, according to Spearman's rho correlation coefficients, there was no high correlation between measurement days of UMTS band. It was determined that the most similar days were Monday and Wednesday and the Spearman's rho correlation coefficient was 0.643. Besides that, it was determined that the least similar days were Thursday and Friday and the Spearman's rho correlation coefficient was 0.276.
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Abstract (Original Language): 
Mobil haberleşme sistemlerinde çok hızlı teknolojik gelişmeler gözlemlenmektedir. Global System for Mobile Communications (GSM) ve Universal Mobile Telecommunications System (UMTS) gibi ikinci ve üçüncü nesil mobil haberleşme sistemleri zamanla daha yaygın bir şekilde kullanılırken Long Term Evolution (LTE) gibi dördüncü nesil mobil haberleşme sistemi ülkemizde yeni hizmet vermeye başlamıştır. Bu da, dış ortamdaki elektromanyetik alan maruziyet seviyesinin artmasına neden olmaktadır. Bu çalışmada, UMTS bandının Diyarbakır İl Merkezi’nde yer alan ana caddelerde yaymış olduğu elektrik alan şiddeti değerleri bir hafta boyunca mobil olarak ölçülmüştür. Daha sonra, elde edilen ölçüm sonuçları istatistiksel olarak analiz edilmiştir. Ayrıca, UMTS bandına ait bir günlük mobil ölçüm verileri iki ve üç boyutlu olarak harita üzerinde gösterilmiştir. Mobil ölçümlerde, spektrum analizör cihazı, üç eksenli elektrik alan ölçüm anteni, bağlantı kabloları ve elde edilen mobil ölçüm verilerini kaydetmek için dizüstü bilgisayarı kullanılmıştır. Bu ölçümlerde en yüksek anlık elektrik alan şiddeti değeri 6.0900 V/m ve en düşük anlık elektrik alan şiddeti değeri ise 0.0724 V/m olarak ölçülmüştür. Bununla birlikte, UMTS bandında ölçülen ortalama elektrik alan şiddeti değerleri dikkate alındığında ortalaması en yüksek olan gün Çarşamba günü ve değeri ise yaklaşık 0.6281 V/m olarak ölçülmüştür. Buna karşın, ortalaması en düşük gün ise Pazartesi günü ve değeri yaklaşık 0.5936 V/m olarak ölçülmüştür. Standart sapma ve varyans değişiminin en fazla olduğu gün Çarşamba günü olmuştur. Ayrıca, Spearman’s rho korelasyon katsayılarına göre UMTS bandının ölçüm günleri arasında yüksek korelasyon yoktur. Birbirine en çok benzeyen günlerin Pazartesi ile Çarşamba günleri olduğu ve Spearman’s rho korelasyon katsayısının 0.643 olduğu belirlenmiştir. Buna karşın, en az benzeyen günlerin ise Perşembe ve Cuma günleri olduğu ve Spearman’s rho korelasyon katsayısının 0.276 olduğu tespit edilmiştir.
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REFERENCES

References: 

Berg, G., Schüz, J., Samkange-Zeeb, F., and
Blettner, M., (2005). Assessment of
radiofrequency exposure from cellular
telephone daily use in an epidemiological
study: German Validation study of the
international case–control study of cancers of
the brain—INTERPHONE-Study. Journal of
Exposure Analysis and Environmental
Epidemiology, 15 (3), 217–224.
Cooper, T.G., Mann, S.M., Khalid, M., and
Blackwell, R.P., (2006). Public exposure to
radio waves near GSM microcell and picocell
base stations. Journal of radiological
protection : official journal of the Society for
Radiological Protection.
ICNIRP, (1998). Guidelines for limiting exposure to
time-varying electric, magnetic, and
electromagnetic fields (up to 300 GHz). Health
Physics.
IEEE, 2005. IEEE Standard for Safety Levels With
Respect to Human Exposure to Radio
Frequency Electromagnetic Fields, 3 kHz to
300 GHz. IEEE Std C95.1-2005 (Revision of
IEEE Std C95.1-1991).
Koprivica, M., Nešković, N., Nešković, A., and
Paunović, Đ., (2014). Statistical analysis of
electromagnetic radiation measurements in the
vicinity of gsm/umts base station antenna
masts. Radiation Protection Dosimetry, 158
(3), 50.
MapInfo, 2009. MapInfo Professional Version
10.0.1 Release Build 220. MapInfo
Professional Version 10.0.1 Release Build 220.
Narda, 2008. Applicaton Note UMTS measurements
with the Selective Radiation Meter, 1–11.
Narda, 2012. SRM-3006 Selective Radiation Meter
Operating Manual.
Neubauer, G., Feychting, M., Hamnerius, Y.,
Kheifets, L., Kuster, N., Ruiz, I., Schüz, J.,
Überbacher, R., Wiart, J., and Röösli, M.,
(2007). Feasibility of future epidemiological
studies on possible health effects of mobile
phone base stations. Bioelectromagnetics, 28
(3), 224–230
SPSS, IBM Corp. Released 2012. IBM SPSS
Statistics for Windows, Version 21.0.
Armonk, NY: IBM Corp.
Urbinello, D., Huss, A., Beekhuizen, J., Vermeulen,
R., and Röösli, M., (2014). Use of portable
exposure meters for comparing mobile phone
base station radiation in different types of areas
in the cities of Basel and Amsterdam. Science
of the Total Environment, 468-469, 1028–
1033.
Vrijheid, M., (2006). Validation of short term recall
of mobile phone use for the Interphone study.
Occupational and Environmental Medicine, 63
(4), 237–243.

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