System and method of compensating a doppler processor for input unbalance and an unbalance measuring sensor for use therein
US4616229A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1983 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Sep 30, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/285
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method of compensating a digital doppler processor for unbalance in in-phase I and quadrature Q signal inputs thereof is disclosed. The method includes the steps of measuring the unbalance in the I and Q signal inputs to the digital doppler processor, determining a desired set of weighting coefficients based on the measured unbalance, and performing doppler filter calculations in the digital doppler processor with the desired set of weighting coefficients. The system comprises a sensor for measuring the unbalance in the I and Q signal inputs to the digital doppler processor, and apparatus for determining a desired set of weighting coefficients for the doppler filter calculations of the doppler processor based on the measured unbalance of the sensor. The disclosure further includes a sensor system for measuring uncompensated unbalance in the in-phase I and quadrature Q input signals of a digital doppler processor utilizing the outputs of at least one doppler filter of the set of digital doppler filters of the doppler processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.