GPS receivers with adaptive antenna systems for suppressing interference signals
US6175327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Jan 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/084
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
GPS receivers are provided that reduce all types of interference signals with a simple receiver structure that includes an antenna system having a reference antenna element and a plurality of auxiliary antenna elements, a plurality of phase shifters and a power combiner. The receiver also includes a downconverter, a digital GPS processor and an analog-to-digital converter (ADC). Each antenna element generates a single output signal in response to all polarization components of a GPS signal. In response to a composite signal of interference signals and GPS signals, the reference antenna element provides a reference signal and the auxiliary antenna elements provide auxiliary signals which each has a phase difference from the reference signal that is a function of its respective auxiliary antenna element's location in an antenna array space and of paths of the interference signals. The phase shifters facilitate phase adjustment of at least one of the auxiliary signals to thereby reduce the amplitude of the combined signal and thereby reduce the contribution of the interference signal below a selected threshold. The reference signal has a reference signal gain and each of N auxiliary s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.