Communications: directive radio wave systems and devices (e.g. – Clutter elimination
Reexamination Certificate
2006-11-14
2009-02-17
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Clutter elimination
C342S195000, C342S039000, C342S379000
Reexamination Certificate
active
07492312
ABSTRACT:
Very efficient sidelobe suppression of Barker codes is achieved through the use of a mismatched filter, which is comprised of a conventional matched filter cascaded with a computationally efficient filter based on multiplicative expansion. Several constant parameters are introduced in the terms of the expansion and are optimized to improve the performance of the filter. Optimized mismatched filters for length 13, 11, 7 and 5 Barker codes are presented. For each of these codes, filters with one, two and three stages are studied. The technique is extended to compound Barker codes based on their representation in a factored form in the z-domain. Hardware requirements for the filters discussed in the disclosure are also presented.
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Fam Adly T.
Sarkar Indranil
Brainard Timothy A
Tarcza Thomas H
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