EP1033840B1

3G

Title

SPREAD SPECTRUM INTERFERENCE CANCELER SYSTEM AND METHOD

Application Number:

EP20000104576

Publication Date:

12-09-2007

Current Assignee:

Family ID:

Application Date:

05-07-1995

Declaring Company:

Publication Country:

US

Priority Date:

26-07-1994

Title

SPREAD SPECTRUM INTERFERENCE CANCELER SYSTEM AND METHOD

Application Number:

EP20000104576

Family ID:

Publication Country:

US

Publication Date:

12-09-2007

Application Date:

05-07-1995

Priority Date:

26-07-1994

Current Assignee:

Declaring Company:

Abstract  Abstract

A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters a plurality of spread-spectrum-processing circuits subtracting circuits and channel correlators or channel-matched filters. Using a plurality of chip-code signals the plurality of correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals respectively. The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals for spread-spectrum processing the plurality of despread signals respectively with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an i th chip-code-signal the subtracting circuits subtracts from the spread-spectrum CDMA signal each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the ith channel of the spread-spectrum CDMA signal. The channel correlator or channel-matched filter despreads the subtracted signal.

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.