Imaging of indoor multipath radio propagation for 18 GHz band wireless LAN systems: applied radio holography

Autor:	H. Kitayoshi
Rok vydání:	2002
Předmět:	Radio propagation Frequency response Narrowband Computer science Dispersion (optics) Electronic engineering Continuous wave Line-of-sight propagation Multipath propagation Radio wave
Zdroj:	VTC
DOI:	10.1109/vetec.1994.345220
Popis:	Development of high-speed wireless LANs is a major goal of telecommunications industry. We propose a dual-frequency continuous wave (CW) radio holography method for evaluating radio wave propagation environments for such LANs. Our method images the propagation environment with higher resolution (1 ns or less) and higher sensitivity (10 dB /spl mu/V/m) than conventional techniques which use frequency-modulated CWs (FMCWs), pseudonoise (PN) code-modulated waves, or pulse-modulated waves. A narrowband technique virtually eliminates the measurement inaccuracy caused by frequency response dispersion which is often a problem in conventional methods. This paper introduces the new radio wave propagation observation method by presenting examples of indoor propagation images and delay profiles observed at around 18 GHz. >
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6d4cab089480adf028ea1d61efe33673 https://doi.org/10.1109/vetec.1994.345220 Zobrazit plný text záznamu