P. Ali-Rantala, L. Sydanheimo, M. Keskilammi and M. Kivikoski, “Indoor Propagation Comparison between 2.45 GHz and 433 MHz Transmissions,” Antennas and Propagation Society International Symposium, Vol. 1, 2002, pp. 240-243.

has been cited by the following article:

• TITLE: Dynamic 3-D Indoor Radio Propagation Model and Applications with Radios from 433 MHZ to 2.4 GHz

  AUTHORS: Yiming Ji

  KEYWORDS: WiFi; RFID; Radio Propagation Model; Location Based Service; Signal Strength

  JOURNAL NAME: International Journal of Communications, Network and System Sciences, Vol.5 No.11, November 26, 2012

  ABSTRACT: Proliferation of indoor sensor infrastructure has created a new niche for mobile communications, yet research in indoor radio propagation still has not generated a definite model that is able to 1) precisely capture radio signatures in 3-D environments and 2) effectively apply to radios at a wide range of frequency bands. This paper first introduces the impact of wall obstructions on indoor radio propagation by experimental results through a full cycle of an indoor construction process; it then exploits a dynamic 3-D indoor radio propagation model in a two-story building using radio technologies at both 433 MHz and 2.4 GHz. Experimental measurements and evaluation results show that the proposed 3-D model generates accurate signal strength values at all data evaluation positions. Comparing the two radio technologies, this study also indicates that low frequency radios (such as 433 MHz) might not be attractive for indoor mobile computing applications because of larger experimental errors or constant absence of measurement data.