Process for determining a time lapse between a trigger signal and a pilot sequence of a CDMA high frequency signal
US7277418B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2002 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | May 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/242
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A process for determining a time lapse between a trigger signal and a start of a cyclic sequence of a pilot signal of a CDMA high frequency signal includes: simultaneously scanning and storing the trigger signal and the pilot signal; comparing the trigger signal with a trigger threshold to capture a time (ttrig) to reach the trigger threshold; comparing the trigger signal with a trigger threshold to capture a time (ttrig) to reach the trigger threshold; generating a CDMA baseband signal by transforming the CDMA high frequency signal into a complex baseband; correlating the CDMA baseband signal with a cyclic reference sequence to capture the time (tpn) up to the start of the cyclic sequence of the pilot signal; and subtracting ttrig from tpn to determine the lapse in time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.