Patent ID: 7433652
Filing Date: 2008-10-07
Classification: H04B

Abstract:
1. A method comprising: (a) receiving a signal-strength measurement for a signal that traverses a path between a first radio and a second radio; (b) generating an estimate of the location of said first radio, wherein said estimate of the location of said first radio is based on: wherein said path-loss map is based on a path-loss model that estimates the effects of azimuth orientation on path loss; and wherein said path-loss model is based on a matrix that has N rows and L columns; and wherein N and L are positive integers; and wherein said path-loss map comprises measurements at N locations {λ wherein for all iε{1, . . . , N} and jε{1, . . . , L} the element of said matrix at row i and column j equals cos(j·θ