A Radio Frequency Identification System for accurate indoor localization

In this paper we present a novel Radio Frequency Identification (RFID) system for accurate indoor localization. The system is composed of a standard Ultra High Frequency (UHF), ISO-18006C compliant RFID reader, a large set of standard passive RFID tags whose locations are known, and a newly developed tag-like RFID component that is attached to the items that need to be localized. The new semi-passive component, referred to as sensatag (sense-a-tag), has a dual functionality wherein it can sense the communication between the reader and standard tags which are in its proximity, and also communicate with the reader like standard tags using backscatter modulation. Based on the information conveyed by the sensatags to the reader, localization algorithms based on binary sensor principles can be developed. We present results from real measurements that show the accuracy of the proposed system.

A Computational Method based on Radio Frequency Technologies for the Analysis of Accessibility of Disabled People in Sustainable Cities

The sustainability strategy in urban spaces arises from reflecting on how to achieve a more habitable city and is materialized in a series of sustainable transformations aimed at humanizing different environments so that they can be used and enjoyed by everyone without exception and regardless of their ability. Modern communication technologies allow new opportunities to analyze efficiency in the use of urban spaces from several points of view: adequacy of facilities, usability, and social integration capabilities. The research presented in this paper proposes a method to perform an analysis of movement accessibility in sustainable cities based on radio frequency technologies and the ubiquitous computing possibilities of the new Internet of Things paradigm. The proposal can be deployed in both indoor and outdoor environments to check specific locations of a city. Finally, a case study in a controlled context has been simulated to validate the proposal as a pre-deployment step in urban environments.

Symposium on Biological Effects and Measurement of Radio Frequency/Microwaves : proceedings of a conference held in Rockville, Maryland, February 16-18, 1977/

Includes bibliographical references.

Radio frequency interference : hearing before the Subcommittee on Communications of the Committee on Commerce, Science, and Transportation, United States Senate, Ninety-fifth Congress, second session on S. 864 ... June 14, 1978

"Serial no. 95-117."

A temperature probe for radio-frequency heated material /

"January 1981."

Operator's and organizational maintenance manual including repair parts and special tools lists : simulator, radio frequency SM-442A/GRC.

"August 1967."

Direct support and general support maintenance repair parts and special tools list for radio frequency plug-in, Weinschel Engineering Company model 432AP-2 (NSN 4931-01-060-0525).

Includes index.

Direct support and general support maintenance repair parts and special tools list for receiver, radio frequency, Weinschel, model VM-4A, NSN 4931-01-041-1564 and tracking oscillator, Weinschel, model VM-4A/H0-2, NSN 6695-01-102-4342.

Includes index.

Direct support and general support maintenance manual : receiver radio frequency noise measurement equipment including test set, radio frequency noise TS-3376/G (NSN 6625-00-237-2406), monitor, noise temperature ID-1915/G (NSN 5895-00-241-9367) for satellite communication terminal AN/FSC-78(V).

"June 1978."

Organizational and direct support maintenance repair parts and special tools list for monitor, radio frequency R-2176/FRN (NSN 6625-01-098-2534).

Includes index.

Operator's manual : monitor, radio frequency R-2176/FRN (NSN 6625-01-098-2534).

"23 July 1981."

Operator's and organizational maintenance manual : amplifier, radio frequency AM-1881/U.

"28 July 1960."

Field and depot maintenance manual : amplifier, radio frequency AM-1881/U.

"17 February 1961."

General support and depot maintenance manual : amplifiers, audio frequency-radio frequency AM-4825/U and AM-4825A/U.

"October 1969."

Operator's and organizational maintenance manual including repair parts and special tools list : test set, radio frequency AN/GRM-62.

"October 1967."