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. 01, 2003
Filed:
Dec. 10, 1999
Nobuaki Ishii, Tokyo, JP;
Gen Motoyoshi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a code division multiple access mobile communication system, a communication signal is modulated and multiplexed with different diffusion codes and is used in data communication between a base station ( ) and each of mobile units ( ). The communication signal is a time division multiplex signal with a repeated frame having a plurality of time slots (TS TS TS ) assigned to different radio channels, respectively. A slot synchronous signal is produced in accordance with a reference clock signal of a global positioning system. The time slots are synchronized between the base station and each of the mobile units in accordance with the slot synchronous signal.