A GPS satellite signal tracking method for GPS receivers

Abstract

Abstract a method for recapturing a satellite at the highest elevation angle as quickly as possible with a GPS receiver having a plurality of receiving channels when a state of receiving satellite signals recovers to normal after having been interrupted by obstacles like a tunnel, wherein a search range of satellite signal receiving frequency is divided into a plurality of frequency bands and each of which is assigned to the plurality of receiving channels in a one-to-one relationship, a search frequency of each receiving channel is changed in step wise for searching a satellite signal simultaneously in the receiving channels, and further, by providing a time difference for a step wise change-over timing of the search frequency between receiving channels, a time required for recapturing the satellite is greatly reduced by increasing a chance to lock up one of the receiving channels with the satellite signal receiving frequency, since there are as many chances as a number of receiving channels within one cycle of the step wise search frequency change-over for one receiving channel.

Inventors

• 👤 Shozaburo C/O Pioneer Electronic Corp. Sakaguchi
• 👤 Hitoshi C/O Pioneer Electronic Corp. Ando

Bibliographic Details