Signal processing circuit for communicating with a modular...

Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array

Reexamination Certificate

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C342S373000

Reexamination Certificate

active

06888499

ABSTRACT:
A signal processing circuit for satellite communications signal includes a first one dimensional digital beam forming circuit for forming a beam signal in a first direction and a second one dimensional digital beam forming circuit for forming a beam in a second direction. A direction filtering circuit is coupled between the first one dimensional digital beam forming circuit and the second one dimensional digital beam forming circuit. The filtering circuit determining a communications signal direction of the satellite communications signal and tunes the filter to reduce a filter bandwidth and a frequency range of said beam signal prior to processing through the second one dimensional digital beam forming circuit.

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Dr. Dariush Divsalar, “Trellis Coded MPSK Modulation Techniques for MSAT-X”, Proceedings of the Mobile Satellite Conference, JPL Publication 88-9, May 3-5, 1988, pp. 283-290.

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