Passive locating system

Details Passive locating system Passive locating system

1990-06-13

1992-03-24

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

G01S 380

Patent

active

050994565

ABSTRACT:
A passive surveillance system provides ranging and location capability of a signal source. A single receiver in a multipath environment or alternatively a plurality of receivers receive the signal from the source having different propagation delays along different paths. Selection of corresponding frequency components from different paths and mixing of the corresponding selected frequency components from each of the paths generates complex pseudo-noise signals that are suitable for correlation processing. Correlation processing of the mixed signals yields the time difference between the multiple paths. The maximum time difference parameters for each path are used to generate a locus line, either explicitly or implicitly. Range and location processing of the locus information identifies range and location of the signal source.

REFERENCES:
patent: 4312053 (1982-01-01), Lipsky
patent: 4333170 (1982-06-01), Mathews et al.
patent: 4686655 (1987-08-01), Hyatt

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