Vehicular radar system with self-interference cancellation
US9791551B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2017 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Apr 25, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93272
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital FMCW radar is described that simultaneously transmits and receives digitally frequency modulated signals using multiple transmitters and multiple receivers and associated antennas. Several sources of nearby spillover from transmitters to receivers that would otherwise degrade receiver performance are subtracted by a cancellation system in the analog radio frequency domain that adaptively synthesizes an analog subtraction signal based on residual spillover measured by a correlator operating in the receivers' digital signal processing domains and based on knowledge of the transmitted waveforms. The first adaptive cancellation system achieves a sufficient reduction of transmit-receive spillover to avoid receiver saturation or other non-linear effects, but is then added back in to the signal path in the digital domain after analog-to-digital conversion so that spillover cancellation can also operate in the digital signal processing domain to remove deleterious spillover components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.