Signal processing apparatus for selectively filtering digital si

Details Signal processing apparatus for selectively filtering digital si Signal processing apparatus for selectively filtering digital si

1987-03-23

1988-05-31

Malzahn, David H.

Communications: electrical

Digital comparator systems

G06F 702

Patent

active

047484381

ABSTRACT:
A direct access filter includes an array of memories for processing digital signal data from signal sources such as sensors in a radar system. The parameters in a packet are tested against a predetermined set of corresponding data. Each set of data can be considered as a window. If the value of each tested parameter falls within the window, then the packet matches the filter criteria. There can be several sets of filter criteria, and hence all sets must be sequentially tested. Upon finding a filter match, two actions can result: "excision", wherein occurrence of a match results in that parameter packet being discarded from the data flow, or "track", which results in the transfer of the parameter data to a follow on processor. Processing time is saved when a match occurs and no updating of previous data is required.

REFERENCES:
patent: 4563774 (1986-01-01), Gloge
patent: 4674039 (1987-06-01), Chouery
patent: 4675646 (1987-06-01), Lauer

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