Characterization of radio wave propagation into buildings at 1800 MHz

Abstract

Abstract-This paper presents results of signal strength measurements at 1800 MHz in four office buildings in The Hague, illuminated by an outdoor base station with an antenna above the rooftop. The objectives of these experiments are to study the behavior of the received signal strength at different floors of a building and to determine the main characteristics concerning cell coverage, namely, signal attenuation and variation within these buildings. It is shown that large fluctuations occur between average signal levels in line-of-sight (LOS) and non-LOS areas of multifloor buildings.

Investigation of GSM Signal Variation Depending Weather Conditions

“…Both mobile phones were loaded by Ericsson test software. Normalized received signal power given by Martijin et al [20] was measured. RxLev and P r are defined as the measured average received signal level, and received signal level given by Eq.…”

“…P r is the average received signal power measured within one slow associated control channel (SACCH) multi-frame of approximately 480 ms. In total approximately 100 samples are taken within one SACCH multiframe [20]. Car speed was maintained at 40 km/h for collecting enough numbers of SACH frames.…”

“…Signal quality and drop calls of mobile communication operators in buildings have been studied extensively for the last five years [1][2][3][4][5][6]. Helhel et al [7,8] proposed indoor ray tracing propagation model, and propagation through forest into the building model at previous studies, and showed that 1800 MHz operators have disadvantage in comparison to 900 MHz operators.…”

RADIOSTAR: Providing wireless coverage over Gigabit Ethernet

“…Wireless service providers (WSPs) are in a unique position to propagation. Absorption and scattering tend to significantly attenuate the RF signals of a cellular base transceiver station (BTS), often resulting in spotty coverage inside buildings, in particular at lower floors [7] and near elevators. On higher floors, there is often a significant difference between line-of-sight and non-line-of-sight areas.…”

“…However, this requires WSPs to provide reliable, high capacity coverage in enterprises, public spaces, and residences.In-building coverage is a challenging radio frequency (RF) engineering problem [3,[7][8][9][10]. Walls, floors, windows, and internal partitions inside the building create a very complex environment for RF…”