Method and apparatus to determine the frequency and time slot position in a digital wireless communication session
US5491726A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 17, 1993 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Aug 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital wireless communication system operates between a first unit and a second unit. The received digitally encoded signal is sampled to produce a first sampled digital signal. A first bank of match filters with each match filter having a different frequency range is used to pass the first sampled digital signal therethrough. The output of the first bank of match filters having the largest amplitude is selected along with the match filter which produced the largest amplitude output. The digitally encoded signal having this "coarse" frequency range is then passed through a second bank of match filters. Each of the match filters has a fine frequency different from one another. The output of the second bank of match filters is produced and the output having the largest amplitude is selected. In addition, the filter producing the largest amplitude from the second bank of match filters is also selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.