Device for eliminating low frequency noise from a transmission system, in particular 1/f noise in a homodyne radar receiver
US4709237A · kind A · utility
15Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Dec 3, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Device for eliminating the noise in 1/f from a Doppler radar comprising in the HF emitting system, a phase coder introducing, at frequency PRF/2 a phase shift of 0 and .pi. alternately, and in the receiving system, after the receiver, a decoder, or gain inverter progrmmable between -1 and +1, acting, in the same manner as the coder, upon the receiving signal and comprising a low-pass filter downstream from the decoder for eliminating the noise in 1/f, that appears at PRF/2, the device being applied to a ground surveying radar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.