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:
Mar. 17, 1998
Filed:
Dec. 08, 1994
Applicant:
Inventor:
David T Magill, Palo Alto, CA (US);
Assignee:
Stanford Telecommunications, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ; H04L / ;
U.S. Cl.
CPC ...
375206 ; 375202 ; 375260 ; 375308 ; 375344 ; 370204 ; 370206 ; 370209 ; 370210 ; 370342 ;
Abstract
An orthogonal code division multiple access (OCDMA) communication system having multicarrier modulation. The incoming input data stream is broken into multiple parallel streams, each of which modulates its own frequency-division multiplexed carrier. This reduces the chipping rate such that the delay spread does not cause excessive access noise. Particularly robust delay lock loop (DLL) code tracking and particularly robust automatic frequency control (AFC) are provided in the presence of frequency-selective fading.