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:
Feb. 18, 1992
Filed:
Oct. 27, 1989
Applicant:
Inventors:
Shintaro Watanabe, Tokyo, JP;
Yasushi Yamaguchi, Tokyo, JP;
Shigeyuki Nakayama, Tokyo, JP;
Hirotaka Namioka, Tokyo, JP;
Hisashi Terada, Tokyo, JP;
Assignee:
Kabushiki Kaisha Kenwood, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375-1 ; 329304 ; 333154 ; 375 80 ; 375 83 ; 375 94 ; 375 96 ; 375115 ;
Abstract
The correlation between a PN code pattern of the synchronization preamble data of an incoming spread spectrum signal and a reference PN code pattern generated on the reception side is detected by using an SAW convolver. The gate length of the SAW convolver is shorter than the preamble data length. However, an apparatus which can obtain the true correlation output by calculating the logical multiplication of the correlation output from the SAW convolver and the validation pulse is constituted.