Fast acquisition module for a code division multiple access (CDMA) wireless local loop (WLL) system
US6693890B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2000 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/70775
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An acquisition module for acquiring signal timing in a CDMA system has a register for storing and organizing synchronization code, at least 4 match filters for match filtering between I/Q samples and the corresponding synchronization code, at least 4 absolute value blocks for determining absolute values of match filtering results, a summation function for summing results obtained through match filtering and through absolute value taking, and a control logic for controlling the acquisition process, characterized in that the acquisition module loads a 64-bit section of synchronization code and I/Q complex samples and match filters them in a simultaneous manner and, upon registering a value greater than a preset threshold, acquires an initial timing, the initial timing being verified over the remaining 64-bit sections of synchronization code using the same control circuitry used in acquiring the timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.