نتایج جستجو برای: sight nlos paths can lead to large position error also for simplicity

تعداد نتایج: 14272225  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1389

there has been a gradual shift of focus from the study of rule systems, which have increasingly been regarded as impoverished, … to the study of systems of principles, which appear to occupy a much more central position in determining the character and variety of possible human languages. there is a set of absolute universals, notions and principles existing in ug which do not vary from one ...

Journal: :EURASIP J. Adv. Sig. Proc. 2008
Israel Martín-Escalona Francisco Barceló

This paper presents a positioning algorithm, named time of arrival to time difference of arrival (TOAD), which computes timedifference-of-arrival (TDOA) measurements from the messages that time-of-arrival (TOA) stations in sight exchange while their positioning processes are running. This study addresses the accuracy of the TOAD algorithm in two different environments: lineof-sight (LOS) and no...

Journal: :IEEE Transactions on Wireless Communications 2023

This study explores the use of non-line-of-sight (NLOS) components in millimeter-wave (mmWave) communication systems for joint localization and environment sensing. The radar cross section (RCS) a reconfigurable intelligent surface (RIS) is calculated to develop general path gain model RISs traditional scatterers. results show that have greater potential assist due their ability maintain high R...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1390

this study investigated the functions, types and frequencies of code switching in the teachers and students discourse in elt classrooms. to this end, the participants of this study including two groups of teachers and students were selected. the first group of participants were two efl teachers teaching general english courses (at two different levels of proficiency) in an institutional program...

2001
Li Cong Weihua Zhuang

In this paper, we investigate the non-line-of-sight (NLOS) propagation identification and correction for time difference of arrival (TDOA) based mobile user location in wireless communication systems. Based on the defined TDOA residual, an NLOS base station identification algorithm is proposed. Different choices of the reference location for the residual calculation are compared via simulation....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم تربیتی و روانشناسی 1391

abstract prediction of death anxiety on the basis of demographic characteristics and sp پیش بینی اضطراب مرگ براساس ویژگی های دموگرافیک و مولفه های معنویت در سالمندان به کوشش الهام حسن زهی معنویت از جمله مفاهیمی است که سالیان متمادی در حوزه روان شناسی جایگاه خود را یافته است پیشینه پژوهش نشان داده است که با متغیرهای فراوانی در روانشناسی در ارتباط بوده است. هدف از پژوهش حاضر این اس...

Journal: :IEEE Trans. Vehicular Technology 2000
Georgia E. Athanasiadou Andrew R. Nix

A novel three-dimensional (3-D) ray-tracing model capable of supporting detailed representation of the indoor environment, as well as external building structures, is presented in this paper. The developed algorithm uses a hybrid imaging technique where the two-dimensional (2-D) image generations in vertical and horizontal planes are combined to produce 3-D paths. It also employs the concept of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده ادبیات و زبانهای خارجی 1390

bserved by many teachers that most of the time, mumbling and searching for their intended words, students complain why they have forgotten the words they have learned in the previous semesters. they ask for some new ways that may help them to recall and apply the learned words more efficiently, since as they declare one of the most important skills in foreign language learning is having a g...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - پژوهشکده ادبیات 1393

testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...

2003
Changlin Ma R. Klukas

Wireless location has received considerable attention over the past few years. Many techniques, such as time-based methods (TOA and TDOA), AOA based methods, and Assisted-GPS, have been proposed. Time-based methods such as TOA and TDOA, are particularly exciting since they are sufficiently accurate for E911 under ideal conditions. However, several error sources, such as NLOS (Non-Line-Of-Sight)...

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