An Acquisition Method of Multi-channel Short Code Guiding Long Code in Non-integer DSSS Ranging

In order to achieve the relative measurement of the satellite link in the Global Satellite Navigation Constellation, the proposed bidirectional ranging is the key technology to solve the autonomous operation of constellation. In order to improve the ranging precision and shorten the ranging time, an acquisition method of multi-channel short code guiding long code in non-integer DSSS (direct sequence spread spectrum system) is proposed in the non-integer multiple DSSS, which can improve the ranging accuracy to 0. 3m. Considering the resources used, the paper has analyzed and selected different long code of short truncation and different multi-channels, which greatly shortened the time for ranging. The different long code short truncation codes and different parallel ones are selected, which shortens the ranging time to a large extent.