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:
Dec. 15, 1998
Filed:
Sep. 12, 1995
Hiromitsu Miyajima, Ageo, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A spread spectrum communication receiver includes an inverse spread demodulation circuit and a primary demodulation circuit. The inverse spread demodulation circuit has an image PN code generation circuit for generating an image PN code having an image relationship with a PN code which was used in spread modulation of a spread spectrum signal to be received and demodulated, an SS reference signal generation circuit for generating a spread spectrum reference signal having an image relationship with the spread spectrum signal to be demodulated using the image PN code, and a surface acoustic wave device for taking a correlation between the received spread spectrum signal and the spread spectrum reference signal. The primary demodulation circuit has a detection circuit for generating a convolution output by detecting the correlation output from said inverse spread demodulation circuit, and a waveform shaping circuit for shaping the convolution output. The receiver further includes a synchronization circuit for synchronizing a repetition period of the image PN code with the convolution output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile