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. 18, 2006
Filed:
Feb. 29, 2000
Hidenobu Fukumasa, Higashihiroshima, JP;
Hidenobu Fukumasa, Higashihiroshima, JP;
Sharp Kabushika Kaisha, Osaka, JP;
Abstract
An example spread spectrum communication system is provided in which a transmission signal is separated into an I-phase component and a Q-phase component. In a complex spreading portion, spreading is performed by using multipliers and adders together with a sequence pattern of 1 and −1 appearing alternately. The outputs from the complex spreading portion are modulated in multipliers using pseudo-random sequences PN(x) allotted for individual users. The baseband signal undergoes waveform shaping by roll-off filters and is modulated through a carrier modulator, then sent to a power amplifier, where it is amplified and transmitted via an antenna.