Adaptive cross-polarization interference cancellation system
US4438530A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1982 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Jun 14, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Separate components of a received signal are transmitted along two distinct paths to the adaptive cross-polarization interference cancellation arrangement. In each path, appropriate circuitry obtains a sample of a desired component in a particular signal, generates a signal representative of the power envelope of the sample, detects the in-phase and quadrature signals of a correlation between the desired component and interference, and generates control signals in response to the correlation signals to provide improved adjustment of the amplitude and phase of the interference in a canceler circuit. Each path includes a single square law device to reduce DC offset in correlation measurements which occur from square law device mismatches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.