GB2331436A - Rake receiver for spread spectrum signal demodulation - Google Patents

Rake receiver for spread spectrum signal demodulation

Info

Publication number
GB2331436A
GB2331436A GB9904000A GB9904000A GB2331436A GB 2331436 A GB2331436 A GB 2331436A GB 9904000 A GB9904000 A GB 9904000A GB 9904000 A GB9904000 A GB 9904000A GB 2331436 A GB2331436 A GB 2331436A
Authority
GB
United Kingdom
Prior art keywords
spread spectrum
spectrum signal
rake receiver
signal demodulation
correlators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9904000A
Other versions
GB9904000D0 (en
GB2331436B (en
Inventor
Wolfgang Kober
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Data Fusion Corp
Original Assignee
Data Fusion Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Data Fusion Corp filed Critical Data Fusion Corp
Publication of GB9904000D0 publication Critical patent/GB9904000D0/en
Publication of GB2331436A publication Critical patent/GB2331436A/en
Application granted granted Critical
Publication of GB2331436B publication Critical patent/GB2331436B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1081—Reduction of multipath noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers

Abstract

The architecture (54, 58, 60, 62, 66, 70, 74, 78, 82, 86, 90) of the present invention is premised upon an algorithm involving integration of oblique correlators (70) and RAKE filtering (62, 66, 82) to null interference from other spread spectrum signals. The oblique correlators (70) are, based on non-orthogonal projections that are optimum tor nulling structured signals such as spread spectrum signals. RAKE filtering (62, 66, 82) is used to rapidly steer the beam of multi-antenna system to mitigate the effects of multipath.
GB9904000A 1996-08-23 1997-08-22 Rake receiver for spread spectrum signal demodulation Expired - Lifetime GB2331436B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2452596P 1996-08-23 1996-08-23
PCT/US1997/014783 WO1998008319A1 (en) 1996-08-23 1997-08-22 Rake receiver for spread spectrum signal demodulation

Publications (3)

Publication Number Publication Date
GB9904000D0 GB9904000D0 (en) 1999-04-14
GB2331436A true GB2331436A (en) 1999-05-19
GB2331436B GB2331436B (en) 2001-01-10

Family

ID=21821045

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9904000A Expired - Lifetime GB2331436B (en) 1996-08-23 1997-08-22 Rake receiver for spread spectrum signal demodulation

Country Status (3)

Country Link
AU (1) AU4328097A (en)
GB (1) GB2331436B (en)
WO (1) WO1998008319A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872540A (en) * 1997-06-26 1999-02-16 Electro-Radiation Incorporated Digital interference suppression system for radio frequency interference cancellation
JP2982795B1 (en) * 1998-06-29 1999-11-29 日本電気株式会社 Spread spectrum signal receiving method and receiver
US6313786B1 (en) * 1998-07-02 2001-11-06 Snaptrack, Inc. Method and apparatus for measurement processing of satellite positioning system (SPS) signals
US7130292B2 (en) 2000-06-02 2006-10-31 Essex Corporation Optical processor enhanced receiver architecture (opera)
US6711219B2 (en) * 2000-12-04 2004-03-23 Tensorcomm, Incorporated Interference cancellation in a signal
US6771214B2 (en) 2001-09-12 2004-08-03 Data Fusion Corporation GPS near-far resistant receiver
US8005128B1 (en) 2003-09-23 2011-08-23 Rambus Inc. Methods for estimation and interference cancellation for signal processing
KR101011942B1 (en) 2002-09-23 2011-01-31 램버스 인코포레이티드 Method and apparatus for selectively applying interference cancellation in spread spectrum systems
GB2438347B8 (en) 2005-02-25 2009-04-08 Data Fusion Corp Mitigating interference in a signal
FR2929472A1 (en) * 2008-03-28 2009-10-02 France Telecom METHOD FOR PROCESSING INTERFERENCE IN AN XDSL SYSTEM
CN110752861B (en) * 2019-09-25 2021-11-09 浙江海洋大学 Underwater acoustic chaotic spread spectrum communication system and method adopting RAKE receiving technology

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151919A (en) * 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
US5237586A (en) * 1992-03-25 1993-08-17 Ericsson-Ge Mobile Communications Holding, Inc. Rake receiver with selective ray combining
US5602833A (en) * 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151919A (en) * 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
US5237586A (en) * 1992-03-25 1993-08-17 Ericsson-Ge Mobile Communications Holding, Inc. Rake receiver with selective ray combining
US5602833A (en) * 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system

Also Published As

Publication number Publication date
GB9904000D0 (en) 1999-04-14
GB2331436B (en) 2001-01-10
AU4328097A (en) 1998-03-06
WO1998008319A1 (en) 1998-02-26

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20100812 AND 20100818

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20140522 AND 20140528

PE20 Patent expired after termination of 20 years

Expiry date: 20170821