Navigation system using spreading codes based on pseudo-random noise sequences
US10088573B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2011 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Aug 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/709
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
One embodiment of the invention provides a receiver for use in a navigation system comprising multiple transmitters. Each transmitter transmits a positioning signal comprising a pseudo-random noise (PRN) sequence corresponding to the respective transmitter. The receiver comprises a code module for supplying multiple PRN sequences corresponding to the respective multiple transmitters; and a correlator for correlating the PRN sequences supplied by the code module with an incoming signal. The multiple PRN sequences are based on a single Sidelnikov/Lempel/Cohn/Eastman (SLCE) generative sequence uSLCE, and each of said multiple PRN sequences, denoted ui satisfies the equation: ui=uSLCE⊕TiuSLCE, where ⊕ indicates element by element binary XOR addition, and Ti indicates a cyclic shift of i chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.