US2002186673A1

3G

Title

Remote terminal spread spectrum CDMA subtractive interference canceller

Application Number:

US20020201797

Publication Date:

12-12-2002

Family ID:

Application Date:

24-07-2002

Publication Country:

US

Priority Date:

22-04-1993

Declaring Company:

Abstract  Abstract

A spread-spectrum code division multiple access interference canceller employed by a remote terminal for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceller 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 correlators despread the spread-spectrum CDMA signal as despread signals respectively. The spread-spectrum-processing circuits use a timed version of the chip-code signals for spread-spectrum processing the 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. 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.