Method and device for signal-processing in a radar system

Details Method and device for signal-processing in a radar system Method and device for signal-processing in a radar system

1996-02-13

1997-05-27

Pihulic, Daniel T.

Communications: directive radio wave systems and devices (e.g.,

Clutter elimination

342127, G01S 728

Patent

active

056336438

ABSTRACT:
Method and device for reducing, in a radar system, the influence of distortion which has arisen in signals in signal-generating and signal-processing parts of the radar system by firstly applying a first random phase rotation to a signal before a first signal-processing. After the first signal-processing, the signal is phase-rotated with a second phase rotation which has the same phase rotation value as, but the opposite sign to, the first phase rotation. Thereafter, a transmission pulse, created from the signal, is emitted from the radar system and is reflected off targets or objects and is received by the radar system. A third random phase rotation with a second phase rotation value is applied to the received signal before a second signal-processing. After the second signal-processing, the received signal is phase-rotated with a fourth phase rotation which has the same phase rotation value as, but the opposite sign to, the third phase rotation. The result of this is that all distortion products and external interferences which have arisen in the signal-processing paths of the signal will have a random remaining phase rotation, as a result of which these will appear as random noise and can therefore be separated from the useful signals.

REFERENCES:
patent: 4709237 (1987-11-01), Poullain et al.
patent: 5483962 (1996-01-01), Shiba

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