نتایج جستجو برای: sight nlos paths can lead to large position error also for simplicity
تعداد نتایج: 14272225 فیلتر نتایج به سال:
The major problem of indoor localization is presence of Non-line-of-sight (NLOS) channels. In order to perform NLOS identification, in this paper, we propose a novel NLOS identification technique based on threshold selection using the ratio of kurtosis and maximum slope of energy block of the received signal using energy detector. In particular, IEEE 802.15.3c 60 GHz channel models are used as ...
this research is a study on indicators of listening instruction in iranian english as a foreign language (efl) curriculum at guidance school and high school educational levels. this thesis aims at determining: a) the indicators of listening instruction at guidance school and high school efl curriculum. b) the indicators of listening instruction in irans guidance school and high school efl curri...
this study aimed to investigate the effects of listening strategy training on iranian efl learners listening comprehension and use of such strategies. this work, employing an experimental methodology, was conducted among 60 adult efl learners from a language institute in isfahan, iran, as participants. the participants, who were selected based on the results of a placement test, were assigned t...
This paper studies the location of the position method is developed by applying factual analysis on GSM base station (RSS) down link signal strength by using wavelet transform. The GSM received signal strength is converted in terms of wavelet bases and this method estimates the positioning of the mobile and personal tracking the position based systems are used to find a person or an object rela...
Today, smart mobiles play an important role in our daily life. Most of these devices are equipped with a navigation function based on GNSS positioning. However, these devices may not work accurately in urban environments due to severe multipath interference and non-line of sight (NLOS) reception caused by nearby buildings. A promising approach for reducing the effect of multipath interference a...
short story as an important literary genre in the recent decade is focused by many of young writers and literary critical with searching structure, content , artistic techniques and cognitive phenomenon of these works , we can show quantity of using some parts of storied literature from new literal techniques of the word and also we can show the usage of native, cultural and social foundation...
Wireless location is the function used to determine the mobile station (MS) location in a wireless cellular communications system. When it is very hard for the surrounding base stations (BSs) to detect a MS or the measurements contain large errors in non-line-of-sight (NLOS) environments, then one need to integrate all available heterogeneous measurements to increase the location accuracy. In t...
Fixed wireless access networks at millimeter wave frequencies enable an alternative to fiber-optic installations for providing high-throughput Internet connectivity. In this letter, we present outdoor channel measurements D-band ranging from 120 GHz 165 GHz, contributing the design of future fixed networks. We measure angular path loss (PL) both Line-of-Sight (LOS) and non-Line-of-Sight (NLOS) ...
We propose Direct Position Estimation (DPE) utilizing non-line-of-sight (NLOS) GPS signals for urban navigation. In urban environments, buildings reflect GPS signals, leading to reception of NLOS GPS signals. In addition, buildings obstruct GPS signals, resulting in reduced GPS signal availability. We treat NLOS GPS signals as additional line-of-sight (LOS) GPS signals to virtual satellites at ...
Target localization is an important issue for many applications in wireless sensor networks. However, it is rather difficult to maintain the localization accuracy in mixed line-of-sight (LOS) and non-lineof-sight (NLOS) environments as NLOS propagation leads to larger error than what LOS does. In this paper, we propose a new target localization method in mixed environments where NLOS is dominan...
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