Method for processing output or base signals from a device...

Details Method for processing output or base signals from a device... Method for processing output or base signals from a device...

2006-04-25

2006-04-25

Lobo, Ian J. (Department: 3662)

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

Determining distance

With correlation

C342S118000, C367S100000

Reexamination Certificate

active

07034744

ABSTRACT:
To provide a method of processing output or base signals (S), in particular intermediate frequency output or base signals, from at least one device, in particular at least one radar device, for determining a distance (d), in particular a small distance on the order of magnitude of approximately zero meters to approximately 7 meters, of an object, by which it is possible to obtain from the raw signals, i.e., the output or base signals, distance information with respect to at least one object located in the detection or sensing range of the device, the following steps are provided:(a) Adaptively determining the background signal (S0) by localized filtering of the output or base signal (S) using at least one localized filter having a specified width (B);(b) Correcting the background of the output or base signal (s) by(b.1) subtracting the determined background signal (S0) from the output or base signal (S) and(b.2) forming a signal, in particular (s=abs (S−S0)), for example, from the difference (S−S0) of the output or base signal (S) and the background signal (S0);(c) Low-pass filtering, in particular temporal low-pass filtering, of the absolute value signal (s);(d) Forming a correlation signal (k=korr(s)) by correlating, in particular folding, the low-pass filtered absolute value signal (s) with at least one reference maximum having a half-value width; and(e) Determining the at least one object maximum (M) using at least one location-variable, adaptive threshold value (t) which may be determined from the correlation signal (k).

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Ludloff, Albrecht: “Praxiswissen Radar und Radarsignalverarbeitung” 1998, Vieweg&Sohn Verlagsgesellschaft, Wiesbaden XP002197815, p. 6-1, line 1- p. 6-7, line 12; p. 6-13, line 8- p. 6-15, line 8.

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