Due to the demand of dual-band modern wireless communications, this paper presents a dual-band patch antenna for IEEE802.11 a and g wireless local area network (WLAN) system, The antenna has bidirectional patterns that can be switched by an RF switch to select the feeding probe positions. The 2.4GHz and 5.2GHz patches are stacked on a ground plane and are ...
NASA Astrophysics Data System (ADS)
Global Positioning System (GPS) products help to navigate while driving, hiking, boating, and flying. GPS uses a combination of orbiting satellites to determine position coordinates. This works great in most outdoor areas, but the satellite signals are not strong enough to penetrate inside most indoor environments. As a result, a new strain of indoor ...
A fast and accurate measurement procedure to determine experimentally wireless local area network (WLAN) radiofrequency (RF) exposure and to test compliance with international guidelines for the general public is proposed. This is the first paper where all optimal settings for the measurement equipment (sweep time, resolution bandwidth, etc.) are ...
PubMed
Position information in indoor environments can be procured using diverse approaches. Due to the ubiquitous presence of WLAN networks, positioning techniques in these environments are the scope of intense research. This paper explores two strategies for space partitioning when utilizing cascade-connected Artificial Neural Networks ...
... Title : ACCURATE DETERMINATION OF THE MOMENT OF INERTIA AND CENTER OF GRAVITY POSITION OF WIND TUNNEL MODELS. ...
DTIC Science & Technology
... Accession Number : AD0722605. Title : The Determination of the Accurate Positions of Radio Stars by the Lunar Occultation Technique. ...
WLAN CSMA/CA Performance in a Bluetooth Interference Environment ... WLAN CSMA/CA Performance in a Bluetooth Interference Environment ...
A significant development in underground longwall coal mining automation has been achieved with the successful implementation of wireless LAN (WLAN) technology for communication on a longwall shearer. WIreless-FIdelity (Wi-Fi) was selected to meet the bandwidth requirements of the underground data network, and several configurations were installed on operating longwalls to ...
Energy Citations Database
Page 1. Receiver Sites for Accurate Indoor ... 4. TITLE AND SUBTITLE Receiver Sites for Accurate Indoor Position Location Systems 5a. ...
... The Navstar Global Positioning System (GPS) is an all ... to accurately determine their position, velocity, and ... reference system, anywhere on or near ...
... Abstract : Translocation of the Global Positioning System has proved to be a highly accurate method of position determination for onshore and ...
... Title : Feedback for Precision: Highly Accurate and Repeatable Velocity and Position Feedback Are Essential for Precision Motion Control Systems. ...
Spontaneous Group Learning is a concept to form and facilitate face-to-face, ad-hoc learning groups in collaborative settings. We show how to use Ambient Intelligence to identify, support, and initiate group processes. Learners' positions are determined by widely used technologies, e.g., Bluetooth and WLAN. As a second step, learners' ...
, available on PCs and used on a number of mobile platforms, including Apple's iPod touch and iPhonePod touch and iPhone [1] as well as Nokia mobile phones based on Symbian [5]. The resulting position can in the open literature. #12;Figure 2: Equipment used in our experiment. The iPod and iPhone devices in front
E-print Network
Sep 3, 2010 ... PROPOSAL TITLE: Security and Hyper-accurate Positioning Monitoring with ... The US Air Force is actively studying how to add security to ...
NASA Website
Successful navigation of an autonomous vehicle is made possible by accurately measuring real-time position and orientation. Positioning systems should provide fast, accurate and reliable operation through varying conditions. The current positioning system...
National Technical Information Service (NTIS)
Fingers capture and clamp without accurate positioning. Fully open position, fingers encompass large
NASA Technical Reports Server (NTRS)
The Etalon Drive Motor (EDM), a precision etalon control system designed for accurate positioning of
Two systems, one digital and one analog, improve positioning of characters in cathode-ray tube (CRT)
... PERFORMANCE ANALYSIS OF THE IEEE 802.11A WLAN STANDARD OPTIMUM AND SUB-OPTIMUM RECEIVER IN FREQUENCY- SELECTIVE ...
For a robot to build a map of its surrounding area, it must have accurate position information within the area, and to obtain accurate position information within the area, the robot needs to have an accurate map of the area. This circular problem is the ...
