Method and apparatus for suppressing interference from bandspread communication signals
US5495497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0857
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for suppressing interference from a sence of bandspread communication signals received by a radio receiver. Each sample is defined as a vector having signal and interference vector components. The interference vector component is such that: 1) the interference dominates the signal vector component, and 2) the phase of the interference vector components in the sequence changes slowly with time. Interference is suppressed while a portion of the signal vector component that is normal to the interference vector component is estimated as an indication of the bandspread communication signal. To do this, a phase angle is determined for each sample based upon each sample's defined vector. The phase angle for each sample is transformed into a corresponding phase vector based on a symmetric sampling of phase angles from previous and subsequent received signal samples. All terms of each corresponding phase vector are summed and averaged to generate a corresponding average phase gain for each sample. Each corresponding average phase gain is multiplied by a vector normal to the corresponding sample's defined vector to estimate the signal vector that is normal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.