Sub-symbol matched filter-based frequency error processing for spread spectrum communication systems
US6366626B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1998 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Sep 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70711
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
To accommodate the large frequency uncertainty associated with low cost spread spectrum systems, a matched filter architecture is subdivided into cascaded sub-symbol filter segments, the number of which is selected to prevent loss of unacceptable signal energy over the received signal frequency uncertainty. The sub-symbol filter segments are processed in plural phase rotation-signal combiner stages, outputs of which are associated with multiple frequency bins. A respective phase rotation-signal combiner stage multiplies sub-symbol filter segments by respectively offset phase rotation vectors, associated with the plural frequency bins. The sub-symbol phase vector products of each stage are summed to produce plural frequency bin outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.