Resources Contact Us Home
Method and apparatus for determining location using signals-of-opportunity

Image Number 18 for United States Patent #8018383.

A signal-of-opportunity location device (SOLD) that may be situated in a complex radio propagation environment with multiple RF signal obstructions receives RF signals from a distant transmitter. The RF signals from the distant transmitter interact with obstructions in the propagation environment local to the SOLD. The local obstructions perturb the RF signals causing the RF signals to exhibit near field behavior in the complex radio propagation environment. The SOLD receives the locally perturbed signals. The SOLD detects signal characteristics of RF signal components of the received signals and compares these signal characteristics with reference data in a reference data store to determine the current location of the SOLD.

  Recently Added Patents
Compound semiconductor epitaxial structure and method for fabricating the same
Novelty snacks and method of manufacture of same
VEGF-specific capture agents, compositions, and methods of using and making
Wireless device and communication control method
Direct chemical vapor deposition of graphene on dielectric surfaces
High gradient lens for charged particle beam
Method for switching between virtualized and non-virtualized system operation
  Randomly Featured Patents
Detachable cleat system
Vibration testing on rotating machine components
Partial electrolytic dehalogenation of dichloroacetic and trichloroacetic acid and electrolysis solution
Lamp control system
Method and device for driving at least one capacitive actuator
Paper cooling system
Digital densitometer with controlled light emitter
Holder for dental plaque detection system
Securing apparatus for connector
Device for controlling air filling and exhausting of an air cushion