Patents by Inventor Dimitrios Stamatelos

Dimitrios Stamatelos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5987328
    Abstract: From layout and attenuation data of an area and an initial guess, the placement and power levels of base stations and the resulting attenuation and base station ranges are calculated based on any chosen propagation model. A cost function is calculated which indicates the merit of the initial guess placement. The cost function is a function of the transmitter locations and power levels and can be calculated as a linear combination of the uncovered and interference areas. Other cost functions can also be considered. The cost function is optimized by one of several optimization methods to give the optimal base station placement. The optimization can be continuous or discrete. Continuous optimization methods include the modified steepest descent method and the downhill simplex method, while discrete optimization methods include the Hopfield neural network method. The optimization can be performed several times for different initial guess placements to achieve a global, rather than simply local, optimization.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: November 16, 1999
    Inventors: Anthony Ephremides, Dimitrios Stamatelos