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
Semiconductor device
Controller for internal combustion engine
Administrable compositions
Optical disc drive having a tray for loading a disc using supporting portions
Method of monitoring and configuring
Oral care implement accessory
Event-triggered server-side macros
  Randomly Featured Patents
Polyester toner and developer compositions
Focus-point selection system, autofocus system, and camera
Mixing chlorine gas into paper pulp slurries
Methyl, substituted propyl-substituted pentamethyl indane derivatives, processes for producing same and perfumery uses thereof
Crystalline diacetylene polymers
Nasal cannula
Providing context for web articles
Process for screening chemical compounds for modulating the interaction of an EVH1 domain and a process for detecting said interaction
Polypeptide complex that regulates cell cycle and anergy
Reel for the storage of filamentary material