EP0746931B1

3G

Title

DIGITAL DEMODULATOR WITH FREQUENCY AND TIMING CONTROL

Application Number:

EP19940905571

Publication Date:

02-11-2005

Current Assignee:

Family ID:

Application Date:

30-12-1993

Declaring Company:

Publication Country:

US

Priority Date:

31-12-1992

Title

DIGITAL DEMODULATOR WITH FREQUENCY AND TIMING CONTROL

Application Number:

EP19940905571

Family ID:

Publication Country:

US

Publication Date:

02-11-2005

Application Date:

30-12-1993

Priority Date:

31-12-1992

Current Assignee:

Declaring Company:

Abstract  Abstract

A PSK signal is received and digitized in a limiter (26) to substantially remove the signals amplitude characteristics. A phase detector (44) receives the digital data and, based upon transitions in the data between high and low states, provides phase estimates. The phase estimates are converted by a data decoder (50) into binary data representing the symbols transmitted to form the PSK signal. A number of overlapping windows of digital data are used to determine phase estimates. A unique word detector (52) receives binary data from the data decoder (50) and, using a correlation technique, identifies one set of windows which substantially maximizes synchronization of the demodulator with the received PSK signal. After the synchronizing window has been identified, an automatic frequency controller (46) monitors any frequency drift of the PSK signal and corrects the phase estimates.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.