US 6,834,180 B1 · Radio propagation model calibration software

Abstract

A system and method that provides radio field strength modeling useful for determining cellular telephone site coverage. The system and method automate sampling procedures, collecting data at various monitoring points within a radio propagation coverage area. The collected data is then interpolated and spurious samples are eliminated. The resultant radio field strength data and respective location data is then analyzed using either a modified Newton second order gradient or a pseudo-exhaustive search method to modeling the field strength for convex and non-convex models, respectively. An iterative approach is used to facilitate the use of model constraints and to mitigate calibration errors attributable to highly correlated variables. For pseudo-exhaustive searches, noise is introduced into the data analysis routines to avoid convergence on local minimum which would otherwise inhibit convergence towards global solutions.

Claims25

Dependent claims

A method of calibrating modeling equations with measurement data comprising the steps of:

representing the measurement data in a predetermined data structure format;
associating the measurement data with related information within the predetermined data structure format;
calibrating a modeling equation using a modified Newton second order gradient search algorithm with the measurement data and the related information;
calculating a judging factor to determine the acceptability of the calibrated modeling equation;
comparing the judging factor to a standard to determine whether the calibrated modeling equation is acceptable;
determining an adjustment direction to minimize the difference between the judging factor and the standard;
adjusting the calibrated modeling equation using the adjustment direction;
recalculating the judging factor, recomparing the judging factor with the standard, redetermining the adjustment direction and readjusting the calibrated model equation until the calibrated modeling equation is acceptable.

5 more elements

Dependencies are inferred from the claim text.

Radio propagation model calibration software

Life of this patent

Radio propagation model calibration software

Life of this patent

Abstract

Claims25