skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Multi-frequency communication system and method

Abstract

A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the second frequency component including data unique to each remote RFID tag. The system further includes a reader configured to transmit an interrogation signal and to receive remote signals from the tags. A first signal processor, preferably a mixer, removes an intermediate frequency component from the received signal, and a second processor, preferably a second mixer, analyzes the IF frequency component to output data that is unique to each remote tag.

Inventors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174880
Patent Number(s):
6,745,008
Application Number:
09/589,000
Assignee:
Battelle Memorial Institute K1-53 (Richland, WA) PNNL
DOE Contract Number:
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Carrender, Curtis Lee, and Gilbert, Ronald W. Multi-frequency communication system and method. United States: N. p., 2004. Web.
Carrender, Curtis Lee, & Gilbert, Ronald W. Multi-frequency communication system and method. United States.
Carrender, Curtis Lee, and Gilbert, Ronald W. Tue . "Multi-frequency communication system and method". United States. doi:. https://www.osti.gov/servlets/purl/1174880.
@article{osti_1174880,
title = {Multi-frequency communication system and method},
author = {Carrender, Curtis Lee and Gilbert, Ronald W.},
abstractNote = {A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the second frequency component including data unique to each remote RFID tag. The system further includes a reader configured to transmit an interrogation signal and to receive remote signals from the tags. A first signal processor, preferably a mixer, removes an intermediate frequency component from the received signal, and a second processor, preferably a second mixer, analyzes the IF frequency component to output data that is unique to each remote tag.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 2004},
month = {Tue Jun 01 00:00:00 EDT 2004}
}

Patent:

Save / Share:
  • Laser optical communication according to this invention is carried out by producing multi-frequency laser beams having different frequencies, splitting one or more of these constituent beams into reference and signal beams, encoding information on the signal beams by frequency modulation and detecting the encoded information by heterodyne techniques. Much more information can be transmitted over optical paths according to the present invention than with the use of only one path as done previously.
  • Laser optical communication according to this invention is carried out by producing multi-frequency laser beams having different frequencies, splitting one or more of these constituent beams into reference and signal beams, encoding information on the signal beams by frequency modulation and detecting the encoded information by heterodyne techniques. Much more information can be transmitted over optical paths according to the present invention than with the use of only one path as done previously.
  • A radio communication system for use in tunnels, mines, buildings or other shielded locations in which a pair of radiating transmission lines (30), (31) extend through such location in spaced coextensive relation to each other. Each transmission line (30), (31) has at least one unidirectional amplifier (32), (33) interposed therein with the sense of the unidirectional amplifier (32) of one transmission line (30) being opposite to the sense of the unidirectional amplifier (33) of the other transmission line (31). Each of the amplifiers (32), (33) has a gain which is less than the coupling loss between the transmission lines (30),more » (31). Two or more mobile transceivers (35) in the location served by the system are coupled to the transmission lines (30), (31) by electromagnetic wave propagation in space in order to communicate directly with each other at a given radio frequency within the frequency range of the system.« less
  • A radio communication system for use in tunnels, mines, buildings or other shielded locations in which a pair of radiating transmission lines extend through such location in spaced coextensive relation to each other. Each transmission line has at least one unidirectional amplifier interposed therein with the sense of the unidirectional amplifier of one transmission line being opposite to the sense of the unidirectional amplifier of the other transmission line. Each of the amplifiers has a gain which is less than the coupling loss between the transmission lines. Two or more mobile transceivers in the location served by the system aremore » coupled to the transmission lines by electromagnetic wave propagation in space in order to communicate directly with each other at a given radio frequency within the frequency range of the system.« less
  • A chaotic carrier pulse position modulation communication system and method is disclosed. The system includes a transmitter and receiver having matched chaotic pulse regenerators. The chaotic pulse regenerator in the receiver produces a synchronized replica of a chaotic pulse train generated by the regenerator in the transmitter. The pulse train from the transmitter can therefore act as a carrier signal. Data is encoded by the transmitter through selectively altering the interpulse timing between pulses in the chaotic pulse train. The altered pulse train is transmitted as a pulse signal. The receiver can detect whether a particular interpulse interval in themore » pulse signal has been altered by reference to the synchronized replica it generates, and can therefore detect the data transmitted by the receiver. Preferably, the receiver predicts the earliest moment in time it can expect a next pulse after observation of at least two consecutive pulses. It then decodes the pulse signal beginning at a short time before expected arrival of a pulse.« less