US2002196757A1

3G

Title

Method employed by a base station for spread spectrum CDMA substractive interference cancellation

Application Number:

US20020202226

Publication Date:

26-12-2002

Family ID:

Application Date:

24-07-2002

Declaring Company:

Publication Country:

US

Priority Date:

22-04-1993

Title

Method employed by a base station for spread spectrum CDMA substractive interference cancellation

Application Number:

US20020202226

Family ID:

Publication Country:

US

Publication Date:

26-12-2002

Application Date:

24-07-2002

Priority Date:

22-04-1993

Declaring Company:

Abstract  Abstract

A spread-spectrum code division multiple access interference cancellation method for a base station reduces interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceller despreads the spread-spectrum CDMA signal as a plurality of despread signals. A timed version of a plurality of chip-code signals spread-spectrum processes 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 subtracting circuits subtract 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.