Method, system and devices for positioning a receiver

摘要

The invention relates to 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 transmitting unit. In order to enable an improved positioning it is proposed that the method comprises in a first step receiving signals at said receiver. In a second step a correlation of the received signals is performed with predetermined replica codes corresponding to the individual codes employed by the transmitting units for determining potentially used channels based on resulting correlation peaks. A third step consists in determining a value indicative of the signal level of each channel for which a maximum correlation peak is obtained in a correlation with one of said predetermined codes. In a fourth step a position of said receiver is determined based on signals of channels resulting in the correlations in a maximum correlation peak, of which channels the value indicative of the signal level exceeds a threshold value.