Communications: directive radio wave systems and devices (e.g. – Clutter elimination
Reexamination Certificate
2007-01-09
2007-01-09
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Clutter elimination
C342S162000, C342S089000, C342S095000, C342S108000, C342S148000
Reexamination Certificate
active
10856359
ABSTRACT:
Analysis of electromagnetic (or acoustic) multipath propagation inventively focuses upon the transmitter-to-target propagation (transmitted propagation reaching target via both direct pathway and forward scattered pathway) and the target-to-receiver propagation (re-transmitted propagation reaching receiver via both direct pathway and forward scattered pathway). Transmitter-to-target propagation is calculated using conventional multipath modeling technique. The target's overall scattered field is calculated using the calculated transmitter-to-target propagation in conjunction with qualitative electromagnetic/acoustic target information. Target-to-receiver propagation is calculated using conventional multipath modeling technique and/or the reciprocity principle as applied to the calculated transmitter-to-target propagation. Jointly disclosed (practicable therewith or thereapart) is inventive confinement of the assessment of multipath propagation to a “surface interactive region” (“SIR”), intermediate the target and transmitter and/or the target and receiver. The down range time of the propagation, translatable to range distance, is related to error associated with such restriction. A SIR scope is selected commensurately with acceptable error.
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Kaiser Howard
Sotomayor John B.
The United States of America as represented by the Secretary of
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