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:
Jan. 26, 1999
Filed:
Jan. 06, 1997
Hui Liu, Austin, TX (US);
Cwill Telecommunications, Inc., Austin, TX (US);
Abstract
A system and method for modulating synchronous CDMA (S-CDMA) signals in antenna array wireless system. By taking advantage of the symmetric property of Walsh code words utilized in S-CDMA perform modulation of signals intended for a plurality of users. The system includes a Fast Hadamard Transform (FHT) Processor that realizes baseband operations including spreading and digital combining in one step. In addition to significant reduction in computations and storage over prior methods, the invention also provides substantial advantages in hardware implementation. While the exemplary embodiment is described in the context of antenna array CDMA systems, the disclosed techniques have general applications in CDMA systems with arbitrary symbol values.