The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2000
Filed:
Jun. 27, 1997
Thad Genrich, Aurora, CO (US);
Raytheon Company, Lexington, MA (US);
Abstract
Demodulation and bit synchronization apparatus that uses a plurality of field programmable gate arrays to provide parallel processing to implement demodulation and bit synchronization. An analog-to-digital converter converts and demultiplexes applied intermediate frequency signals having a substantially wide bandwidth to output demultiplexed data signals at a lower clock rate. A digital signal processor processes the demultiplexed data signals to produce detected signals. A plurality of algorithms are implemented in the demodulator and bit synchronizer that include Costas loop demodulators, for example implemented using a carrier loop/lock detector, a direct digital synthesizer and a plurality of multipliers. Eight-tap T/2 baseband equalizers are implemented using in-phase and quadrature-phase accumulators and equalizers, and an in-phase/mid-phase bit synchronizer is implemented using the in-phase accumulator and a mid-phase accumulator and equalizer. The implementation is unique in that most of the signals are demultiplexed to allow parallel processing.