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:
Nov. 08, 2005
Filed:
Jan. 26, 2000
Pingzhi Fan, Chengdu, Sichuan, 610031, CN;
Naoki Suehiro, Tsukuba-shi, Ibaraki 305-0031, JP;
Noriyoshi Kuroyanagi, Higashiyamato-shi, Tokyo 207-0022, JP;
Pingzhi Fan, Chengdu, Sichuan, 610031, CN;
Naoki Suehiro, Tsukuba-shi, Ibaraki 305-0031, JP;
Noriyoshi Kuroyanagi, Higashiyamato-shi, Tokyo 207-0022, JP;
Other;
Toyo Communication Equipment Co., Ltd., Kanagawa, JP;
Daiei Electronics Co., Ltd., Tokyo, JP;
Abstract
A direct sequence spread spectrum system consisting of modulator and demodulator wherein the spreading sequence with zero correlation zone properties, and the despreading consists of multiplying the received signal with the same spreading sequence, followed by a low pass filter, decoder and deinterleaver. The bit rate of the spreading sequence for each user is normally much higher than the input encoded data bit rate, and therefore it spreads the system spectrum.