Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Wristwatch
Communication apparatus, communication method, and program for exchanging data with a target
Method, apparatus, and system for energy efficiency and energy conservation including dynamic cache sizing and cache operating voltage management for optimal power performance
Image display device and display unit for image display device
Concentration measuring apparatus for hydrogen sulfide in gas flow, and method for determining sulfide ion
Analysis device and an analysis apparatus using the analysis device
Local access to data while roaming with a mobile telephony device
  Randomly Featured Patents
Accessory strap fixing structure and portable electronic device having the same
Method for maintaining the reduction of a sliding esophageal hiatal hernia
Semiconductor device
Beam connection
Method for modifying the toxicity of DNA reactive cross-linking agents to cells
Semiconductor device including capacitive circuit and short-circuit preventing circuit connected in series
Belt with openings used to support and guide garments in overhead conveyor systems
Dispersive near-infrared spectrometer with automatic wavelength calibration
Floral container having a water-impermeable external layer
Pattern registration control bars