Patent ID: 6646596
Filing Date: 2003-11-11
Classification: G01S

Abstract:
A method for positioning a receiver based on code modulated signals transmitted by a plurality of transmitting units, which code modulated signals are formed by an individual code for each of said transmitting units, said method comprising:receiving signals at said receiver; performing a correlation of said received signals with predetermined replica codes corresponding to said individual codes employed by said transmitting units for determining, based on resulting correlation peaks, channels potentially formed by a code of one of said code modulated signals; determining a value indicative of the signal level of each determined channel for which a maximum correlation peak is obtained in a correlation with one of said predetermined codes; determining a position of said receiver based on signals of those channels resulting in said correlations in a maximum correlation peak in a correlation with one of said predetermined codes, of which channels the respective value indicative of the signal level exceeds in addition a threshold value.