Patent · US Expired

Open loop timing control for synchronous CDA systems

US6810028B1 · kind B1 · utility

8Cited by

5References

68Claims

0Family size

Assignee

L-3 COMMUNICATIONS CORPORATION · US

Inventors

Thomas R. Giallorenzi · Riverton, US
David Matolak · Herndon, US
Douglas G. Bowen · Spanish Fork, US

Key dates

Filing date	Sep 6, 2000
Grant date	Oct 26, 2004
Priority date	—
Expiry date	Nov 27, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH04W56/007
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Method and apparatus for maintaining synchronization in a CDMA communication system by operating closed loop timing control between a radio base unit and subscriber units, operating open loop timing control between the radio base unit and the subscriber units, and using timing information derived from the open loop to correct the closed loop. Generally the open loop is faster in response than the closed loop. The open loop timing control may be generated by using GPS data. A radio base station and a subscriber unit operating in accordance with these principles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.