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.:

US 8594153 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 26, 2013

Filed:

Apr. 24, 2007
Applicant:

Scott A. Mcdermott, Washington, DC (US);

Inventor:

Scott A. McDermott, Washington, DC (US);

Assignee:

Comtech Mobile Datacom Corporation, Germantown, MD (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/69 (2011.01); H04B 1/707 (2011.01); H04B 1/713 (2011.01);
U.S. Cl.
CPC ...
Abstract

A receiving system dynamically searches the communications band for transmissions of messages having the same nominal communications parameters, including the use of the same spreading code, but having potentially different specific frequencies and code-phases. The receiver, which is independent of the transmitters, samples the communications band at each code-phase of the spreading code over a span of downconverted transmission frequencies. When a message element is detected at a particular code-phase and frequency, it is forwarded to a demodulator that demodulates the message and sends it to its intended destination. In a preferred embodiment, a progressive Fourier Transform is used to incrementally determine the power level at each successive code-phase at a given frequency, thereby substantially reducing the time required to search for transmissions at each discrete code-phase.


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McDermott, Scott. (2013). Spread-spectrum receiver with progressive fourier transform (U.S. Patent No. 8594153). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8594153

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