LORAN RECEIVER AUTOMATED MASTER SEARCH

摘要

In a Loran C receiver, automated method and apparatus for synchronizing receiver timing to the portion of received Loran signals corresponding to the transmissions from the master stations to identify the position and timing of the master signals in the received Loran transmissions. A two-step search is made to correlate received signal phase coding with known coding for the master signal. The first step provides a short term correlation to identify a probable correlation while a second, longer term correlation test operates to verify a master correlation from the first step. The multiple step search for the master reduces the time necessary to locate and synchronize to the master station with a high degree of certainty.