A12.1 OVERVIEW

The relative position between a transmitter and a receiver is described by its Distance, Azimuth and Delta X,Y when you have selected a decorrelated mode, or by Delta X, Y only when you have selected a correlated mode. The selection of this mode and input parameters are described in Section ‎5.4.1 (VLT-VLR or ILT-ILR) and Section ‎10.3.1 (ILT-VLR)

Distance: The distance between the Rx and the Tx (d_{Tx to Rx} ) is calculated through multiplying a trialled path distance factor  by the coverage radius R_max such as 

Azimuth: The azimuth a_{Rx to Tx} of the Tx-Rx path is calculated trough a trial of path azimuth according to the defined distribution:

a_{Rx to Tx} = T(A_{Rx to Tx})                                                                                (Eq. 160)

The relative positioning of the pair of Tx and Rx is calculated in Cartesian coordinates. The relative positioning is always expressed relatively to the transmitter and is defined as:

∆X _Tx/Rx = ∆X + d_{Rx to Tx} cos(a_{Rx to Tx})                                                       (Eq. 161)

∆Y _Tx/Rx = ∆Y + d_{Rx to Tx} sin(a_{Rx to Tx})                                                        (Eq. 162)

Consequently, assuming that one of the two pair of transmitter and receiver is fixed, it is then possible to use the relative positioning to determine the absolute location of the second pair of transmitter and receiver.