Patent ID: 9612336
Date: 2017-04-04
CPC Classifications: G01S

Claim:
1. A method for detecting anomalies on navigation signals received by N reception channels of a satellite positioning receiver, where N is an integer number greater than 1, each channel i, where i is between 1 and N, each of the N reception channels respectively including a carrier correlation circuit, a code correlation circuit including spot, advance and delay correlators, a code discriminator, a carrier phase discriminator, the code and carrier phase discriminators being connected to a common channel filter suitable for managing, jointly, a position of a spot, advance and delay correlators of the N reception channels to reduce code and carrier phase error values delivered by the code and carrier phase discriminators, the method comprising: extracting the code error values delivered at respective outputs of the N code discriminators; comparing the extracted code error values with a same first threshold value corresponding to an acceptable maximum code error value; assigning a confidence index to each navigation signal received on each reception channel i, the confidence index depending on the result of the comparison carried out on the code error values; selecting navigation signals having a confidence index higher than a reference minimum confidence level; and transmitting to a common channel filter only the selected navigation signals.