US 5,703,593 AGranted

Adaptive DPCA subsystem

AssigneeNorthrop Grumman Corporation

InventorsThomas A. Campbell, Heinz H. Schreiber, Niki Yioves

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Abstract

An ADPCA subsystem includes a weight processor for weighting the delta channel signal according to the results of an adaptive algorithm to which the output of a DPCA vector combiner is input. An AMTI vector combiner is connected to the output of the DPCA vector combiner to form the filter output. The delta channel signal is time delayed and samples of the delta channel signal are collected by the processor together with a sum channel sample and a residue sample, in order to apply the proper weights to the undelayed and delayed delta channel samples. The output of the ADPCA weight processor therefore provides an optimum correction signal to the vector combiner.

Claims10

Dependent claims

In a signal processing subsystem, including:

means for receiving a signal at a predetermined interval and converting said signal into signals representative of a sum channel vector and a difference channel vector;
means for modifying the difference channel vector to obtain a correction vector;
means for subtracting the correction vector from the sum channel vector to obtain a difference vector;
means for adding the correction vector to the sum channel vector to obtain a sum vector;
means for storing the sum vector for said predetermined interval;
means for combining the difference vector with the sum vector after having stored the sum vector for said predetermined interval, wherein the improvement comprises:
weight processor means connected between the vector combiner means and the difference channel modulating means for combining an output of said vector combiner with said difference channel signal in order to adaptively modify said correction vector to optimize said output of said vector combiner means.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/571,001Filed 12 Dec 1995
Granted: 30 Dec 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01S 13/4472
Monopulse radar, i.e. simultaneous lobing: with means specially adapted to airborne monopulse systems
G01S 13/5242
Based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi: with…
G01S 13/449
Monopulse radar, i.e. simultaneous lobing: combined with MTI or Doppler processing circuits
G01S 13/5244
Based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi: adaptive…

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