This paper provides the results of a complete study about the indoor radio propagation channel at 17 GHz. Wideband parameters, as coherence bandwidth or rms delay spread, and coverage are analyzed for the design of an OFDM-based broadband WLAN. Discussion about some adequate system parameters is also included. The report presents the characterization results as well as a recently developed indo...

This study evaluated an indoor location estimation method using a wireless local area network (LAN). The Fingerprint was used as technique. can estimate the current based on received signal strength indicator and media access control address obtained from LAN points. However, this is greatly affected by changes in radio propagation environment, presence or absence of obstacles reduces accuracy....

Despite of the great advances in Global Positioning System (GPS) technology, millions of people still cannot be located when they are in indoor environment. The signal transmitted from the Navstar satellites experiences severe attenuation while penetrating all the construction materials. The characteristics of the indoor propagation is still not well understood and the question whether the GPS ...

Radio propagation measurement is carried out in Jakarta, Indonesia, in anticipation of digital TV implementation in the country. Measurements are made using a fixed, portable receiver outdoors and indoors. Spatial variations of the received power, both large-scale and small-scale, are measured in these locations. Results show that the largescale path loss variation characteristics, as described...

This paper reports link-level Monte Carlo simulations for a system that is compatible with the physical layer of the 5-GHz IEEE 802.11a wireless-local-area network and utilizes an adaptive antenna array at the access point for single-user smart-antenna operation, as well as for space-division multiple access (SDMA). For the spatial indoor radio propagation channel, complex impulse-response reco...

There has been recent interest in characterizing UHF propagation within buildings and houses. Factory radio channels, however , have not been discussed previously in the literature. This paper details the results of narrow-hand propagation measurements performed at five factories. The extensive empirical data indicate that path loss is dependent upon local surroundings and is log-normally distr...

This paper presents a microscopic analysis of MANET routing protocols’ behavior in realistic environments. The motivation of this study was due to our previous testbed experimentations where we found that AODV and DSDV’s performance did not match simulation results, primarily due to the use of a simple radio propagation model that did not take into account transient links caused by small-scale ...

We introduce the vertical profile of atmospheric conductivity in the range from 2 to 98 km. The propagation constant of extremely low frequency (ELF) radio waves was computed for this profile by using the full wave solution. A high correspondence is demonstrated of the data thus obtained to the conventional standard heuristic model of ELF propagation constant derived from the Schumann resonance...