Method and apparatus for correlating signals received from a navigation satellite system

Patent metadata

Field	Value
Publication number	US-9178561-B2
Application number	US-201414483112-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 11, 2013
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

A plurality of samples of a signal are stored in a buffer, the signal corresponding to a navigation system. A plurality of starting locations in the buffer are determined, the plurality of starting locations corresponding to a plurality of correlations to be calculated. A plurality of correlations are calculated using i) a plurality of local replica signals, and ii) data read from the buffer using the plurality of starting locations, the local replica signals corresponding to pseudo random number (PRN) codes utilized by transmitting devices in the navigation system. The plurality of correlations are utilized to one or more of i) detect PRN codes in the signal, ii) detect one or more phase shifts associated with PRN codes, or iii) detect one or more frequency shifts associated with PRN codes.

First claim

What is claimed is:

1. A method, comprising:
storing a plurality of samples of a signal in a buffer implemented in a memory device, the signal corresponding to a navigation system;
determining, with one or more integrated circuit devices, a plurality of starting locations in the buffer, the plurality of starting locations corresponding to a plurality of correlations to be calculated, wherein ones of at least some of the starting locations are determined based on respective code…

Assignees

• Marvell World Trade Ltd

Inventors

• Xu Feng
• Jia Zhike

Classifications

• G01S19/37 Primary

  Physics · mapped topic

• G01S19/30 Primary

  Physics · mapped topic

• H04B1/708

  Electricity · mapped topic

• H04B1/709 Primary

  Electricity · mapped topic