Method and apparatus for efficient correlation detection
US6487260B1 · kind B1 · utility
9Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Apr 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/148
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A full serial implementation of a M-level correlation based demodulator (100) includes a two's complement, pass-through, zero-out complex conjugate multiplier element (102), a boxcar filter (104) coupled to the multiplier element, a complex magnitude approximater element (106) coupled to the boxcar filter and a maximum value and index holding element (108). The multiplier element reuses common products along an M-level of cross-correlation to reduce multiplication functions at a rate 2 times M faster than a sampling rate at an input of the demodulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.