Wideband radio propagation modeling for indoor geolocation applications

A framework fo r statistical modeling of the wideband character- ABSTRACT ist ics o f the frequency-selective fad ing mul t ipa th indoor radio channel fo r geolocation applications is presented. Mul t ipath characteristics o f the channel are divided into three classes according t o availability and the strength of the direct line of sight (DLOS) path w i th respect t o the other paths. Statistics o f the error in est imating the t i m e o f arrival o f the DLOS path in a bu i ld ing is related t o t h e receiver’s sensitivity and dynamic range. The effects of external walls on estimating the location o f the DLOS path are analyzed. ndoor radio channels suffer from extremely seri- I ous multipath conditions that have to be mod-eled and analyzed to enable the design of radio equipment for a variety of applications. The objective of wideband radio propagation modeling for telecommunications and geoloca-tion applications are quite different. As a result, available models for radio channel propagation are not adequate for analyzing the performance of geolocation systems. In radio propagation studies for telecommunication applications, th