Frequency spectrum analyzer
US4005417A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Aug 14, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency spectrum analyzer adapted for use in a real time signal processing radar system is disclosed. In such system a plurality of sets of radar returns, each one of such sets corresponding to radar returns from objects disposed in each one of a like plurality of range cells, is stored in a time compressor section, the radar returns in each one of the sets thereof being stored at the pulse repetition frequency (PRF) of such radar system. After storage of such radar returns, a like plurality of chirp pulses is produced, each one of such pulses having a dispersive time K.tau.. Synchronously with each one of the chirp pulses, one of the plurality of sets of stored radar returns is retrieved from the time compressor section, in a time duration equal to K.tau.. Each one of the retrieved sets of radar returns is mixed with a corresponding one of the plurality of chirp pulses to produce a series of mixed signals which is coupled to a pulse compressor. Each one of the mixed signals is compressed into a pulse occurring at a time related to the Doppler frequency of any object in the range cell producing such associated radar returns. The time compressor section is used prior to pulse co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.