Reducing satellite signal interference in a global positioning system receiver

Abstract

A method and apparatus is disclosed for reducing cross-interference between received satellite signals in a satellite positioning system receiver. A satellite positioning receiver receives satellite signals from a plurality of satellites. Spurious signals when processing a weak received satellite signal due to interference by a stronger received signal are reduced by estimating certain characteristics of the stronger signal creating an interference waveform based on these estimated characteristics and subtracting this interference waveform from a set of correlation outputs for the weaker signal to remove the interference effects of the stronger signal. Alternatively a subset of these correlation outputs are ignored where the interference waveform produces strong spurious signals.

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3G	04/06/2004	ISLD-200407-018	QUALCOMM INC	S1 TS Number: TS 125 331 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 125 413 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 125 430 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 125 453 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	No	Family Member
4G,3G	04/06/2004	ISLD-200407-018	QUALCOMM INC	S1 TS Number: TS 123 171 Version No: ---- Illustrative part: ---- Release No: ---- + -	No	Family Member
5G,4G,3G,2G	04/06/2004	ISLD-200407-018	QUALCOMM INC	S1 TS Number: TS 124 008 v6.3.0 Version No: v6.3.0 Illustrative part: ---- Release No: 6 S2 TS Number: TS 122 071 Version No: ---- Illustrative part: ---- Release No: ---- +1 -1	No	Family Member
2G	01/03/2011	ISLD-201104-002	QUALCOMM INC	S1 TS Number: TS 144 031 Version No: ---- Illustrative part: ---- Release No: ---- + -	Yes	Basis Patent
3G	01/03/2011	ISLD-201104-002	QUALCOMM INC	S1 TS Number: TS 125 331 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 125 453 Version No: ---- Illustrative part: ---- Release No: ---- +1 -1	Yes	Basis Patent
4G	01/03/2011	ISLD-201104-002	QUALCOMM INC	S1 TS Number: TS 136 355 Version No: ---- Illustrative part: ---- Release No: ---- + -	Yes	Basis Patent
Not Available	01/03/2011	ISLD-201104-002	QUALCOMM INC	S1 TS Number: TS 125 331 Version No: ---- Illustrative part: ---- Release No: ---- S2 TS Number: TS 125 453 Version No: ---- Illustrative part: ---- Release No: ---- S3 TS Number: TS 136 355 Version No: ---- Illustrative part: ---- Release No: ---- S4 TS Number: TS 144 031 Version No: ---- Illustrative part: ---- Release No: ---- +3 -3	Yes	Basis Patent

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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
-----	-----	-----	-----	-----	S1 TS Number: ----- Version No: ----- Section No:----- Release No:----- + -				-----	-----	-----	-----

US6236354B1

5G,4G,3G,2G

Title

Reducing satellite signal interference in a global positioning system receiver

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