Patent ID: 9188678
Filing Date: 2015-11-17
Classification: G01S

Abstract:
1. A method to be performed by a global positioning satellite (GPS) receiver for interpolating GPS pseudorandom noise (PRN) codes, the method comprising: receiving a GPS PRN code from a global positioning satellite; generating different replica PRN codes, wherein each replica PRN code includes a known PRN code that is the same for all of the replica PRN codes but that is interpolated to a frequency that is unique to the respective replica PRN code, wherein the generating includes correlating each of the replica PRN codes multiple times with the GPS PRN code received from the global positioning satellite, each time of the multiple times being with a different phase shift; and for each respective replica PRN code, (i) storing the respective replica PRN code in a memory after the respective replica PRN code is generated and (ii) deleting the respective replica PRN code from the memory when a successive replica PRN code is generated.