Selection and Tuning Propagation Path Loss Model for Hawassa City, Ethiopia at ۱۸۰۰MHz Frequency

  • سال انتشار: 1402
  • محل انتشار: مجله پژوهش های کاربردی در مهندسی برق، دوره: 2، شماره: 2
  • کد COI اختصاصی: JR_JAREE-2-2_004
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 114
دانلود فایل این مقاله

نویسندگان

Tamirat Tilahun

Electrical and Computer engineering, Hawassa University, Hawassa, Ethiopia

Robel Getachew

Ethio telecom, Hawassa, Ethiopia

چکیده

Path loss models estimate the average path loss a signal experiences at a particular distance from a transmitter. However, each type of existing path loss propagation model is designed to predict path loss in a particular environment that may be inaccurate in other different; hence selecting the best path loss model and optimizing it will minimize that inaccuracy. This work presents a comparative analysis of five empirical path loss models, COST- ۲۳۱, ECC-۳۳, Hata, SUI, and Ericsson model, with respect to the measured data from the ۱۴ selected sites in Hawassa city, Ethiopia at ۱۸۰۰ MHz frequency bands. A drive test methodology was adopted for data collection and Nemo Handy and Nemo Outdoor were used as measuring tools for the test. Error measuring tools such as Root Mean Square Error, Mean Absolute Error, Standard Deviation, and Mean Absolute Percentage Error was used to select the terrain type of each site and the path loss model that best fits that site. The results showed not only Hawassa city consists of urban and Suburban terrains but also ECC-۳۳ and Hata are better estimators for Hawassa Urban and Suburban areas with RMSE of ۴.۱۸ and ۷.۸۶ respectively. The model tuning using the Least Square Method reduced the RMSE of ECC-۳۳ and Hata to ۲.۴۶ and ۵.۱۸ respectively. The reduction in RMSE shows that the tuned versions are close to the environment. Hence, using the tuned versions of the selected models will result in good cellular network design and enhance service quality.

کلیدواژه ها

path loss, Path loss model, Urban, Sub-Urban, model tuning, Least Square Method

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.