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Title: Robust low-frequency spread-spectrum navigation system

Abstract

Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.

Inventors:
 [1];  [2]
  1. Loudon, TN
  2. Powell, TN
Issue Date:
Research Org.:
UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1012777
Patent Number(s):
7876267
Application Number:
12/609,902
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
G - PHYSICS G01 - MEASURING G01C - MEASURING DISTANCES, LEVELS OR BEARINGS
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Smith, Stephen F, and Moore, James A. Robust low-frequency spread-spectrum navigation system. United States: N. p., 2011. Web.
Smith, Stephen F, & Moore, James A. Robust low-frequency spread-spectrum navigation system. United States.
Smith, Stephen F, and Moore, James A. Tue . "Robust low-frequency spread-spectrum navigation system". United States. https://www.osti.gov/servlets/purl/1012777.
@article{osti_1012777,
title = {Robust low-frequency spread-spectrum navigation system},
author = {Smith, Stephen F and Moore, James A},
abstractNote = {Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {1}
}

Patent:

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Works referenced in this record:

Frequency-hopping spread-spectrum modulation for digital communications over electrical power lines
journal, May 1990