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:
May. 16, 2000
Filed:
May. 12, 1998
Yozan Inc., Tokyo, JP;
Abstract
A spread spectrum communication system wherein spreading codes for in-phase and quadrature components are composed by addition and subtraction and the received signal is multiplied by these composed codes for despreading. The communication system comprises a transmitter generating in-phase and quadrature components. The transmitter includes a spreading circuit for spreading the in-phase and quadrature components. The system further includes a receiver, a phase correction circuit for correcting the phase of despreaded components, a rake combiner for combining the components corrected by the phase correction circuit and a circuit for outputting a combined signal and a delay detection circuit for delaying detection of the combined signal. The receiver also comprises a provisional judgment portion for judging the phase of a pair of the in-phase and quadrature phase components. The phase correction circuit corrects the phase according to the phase judged by the provisional judgment portion.