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We describe an advanced mobile channel sounder system that has been under development by engineers at NTIA's Institute for Telecommunication Sciences since 2010. We provide a description of the channel sounder and the key system components. We then highlight the flexibility and power of this system by showing a variety of measured and processed radio propagation results obtained using this system...
The Tethered balloon is new technology for telecommunication that can overcome the limitation of terrestrial system and satellite system due to demand for high capacity in telecommunication. Tethered balloon provides large coverage area with line of sight, which needs large number of base stations for coverage with terrestrial system; also reduce the delay time of the transmission compared to satellite...
This paper proposes the prediction propagation of path loss band 2100 MHz 3G, the mobile in suburban of Thailand. The selected site is Pathum Thani province which has a few of construction. This experiment measured the signal at different distance and different direction from mobile base stations. The results from experiment will be compared with the calculating value in order to make the new empirical...
This paper addresses path loss prediction by means of Lee's model for Jiza town, south of Amman city, Jordan. Data were supplied by mobile operators in Jordan in the frequency band of 900 MHz. A calibration for Lee's model is done using ten different locations in Jiza town. The calibrated Lee's, Hata, and Egli's path loss models were compared with respect to the original collected data from mobile...
Maritime communication plays an important role in marine activities, but insufficient knowledge of radio channel characteristics over sea limits the development of wideband wireless communication systems for maritime applications. Therefore a land-to-ship (L2S) radio channel measurement assignment has been performed in Trondheim, Norway. In this paper we have focused open sea propagation environments,...
A novel algorithm for evaluating the quality of movable signal coverage in gridded area is proposed in this paper. The algorithm makes use of minimum mean-squared error rule to fit the path loss formula in Okumura-Hata model, combining the existing field test data, and then calculates the signal strength of each grid in the designated area by combining the fitted path loss formula and the parameters...
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