Navigation and position determination with a multicarrier modulation signal of opportunity
US8072383B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Feb 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multicarrier modulation position determination method that includes deploying at least one known receiver with a known location and a second receiver with an unknown location. At least two signals of opportunity with different locations are obtained by both the receiver and the second receiver. The signals having a plurality of block data, the block data having block boundaries. The block boundaries including a beginning block boundary and an end block boundary. The block data further including a cyclic prefix at the beginning block boundary. Acquiring a plurality of data samples for at least a portion of the block data and correlating the attained signal of opportunity between the receivers. The correlating process includes the calculation of a time difference of arrival between the known receiver and the second receiver. The time difference of arrival is calculated by aligning the block boundaries and computing a single scalar statistical feature associated with each block. The location of the second receiver is calculated by using a plurality of single scalar statistical features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.