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WO2007038018A3 - Iterative interference cancellation using mixed feedback weights and stabilizing step sizes - Google Patents

Iterative interference cancellation using mixed feedback weights and stabilizing step sizes Download PDF

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Publication number
WO2007038018A3
WO2007038018A3 PCT/US2006/036018 US2006036018W WO2007038018A3 WO 2007038018 A3 WO2007038018 A3 WO 2007038018A3 US 2006036018 W US2006036018 W US 2006036018W WO 2007038018 A3 WO2007038018 A3 WO 2007038018A3
Authority
WO
WIPO (PCT)
Prior art keywords
rake
stabilizing step
receiver
interference cancellation
step sizes
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.)
Ceased
Application number
PCT/US2006/036018
Other languages
French (fr)
Other versions
WO2007038018A2 (en
Inventor
Tommy Guess
Michael L Mccloud
Vijay Nagarajan
Singh Lamba Gagandeep
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.)
TensorComm Inc
Original Assignee
TensorComm Inc
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
Priority claimed from US11/233,636 external-priority patent/US8761321B2/en
Priority claimed from US11/451,688 external-priority patent/US7702048B2/en
Application filed by TensorComm Inc filed Critical TensorComm Inc
Publication of WO2007038018A2 publication Critical patent/WO2007038018A2/en
Publication of WO2007038018A3 publication Critical patent/WO2007038018A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04B1/71075—Parallel interference cancellation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70702—Intercell-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

A receiver is configured for canceling intra-cell and inter-cell interference in coded, multiple-access, spread-spectrum transmissions that propagate through frequency-selective communication channels. The receiver employs iterative symbol-estimate weighting, subtractive cancellation with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be implemented explicitly in software or programmed hardware, or implicitly in standard Rake-based hardware either within the Rake (i.e., at the finger level) or outside the Rake (i.e., at the user or subchannel symbol level).
PCT/US2006/036018 2005-09-23 2006-09-15 Iterative interference cancellation using mixed feedback weights and stabilizing step sizes Ceased WO2007038018A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US11/233,636 US8761321B2 (en) 2005-04-07 2005-09-23 Optimal feedback weighting for soft-decision cancellers
US11/233,636 2005-09-23
US73620405P 2005-11-15 2005-11-15
US60/736,204 2005-11-15
US11/451,688 2006-06-13
US11/451,688 US7702048B2 (en) 2005-11-15 2006-06-13 Iterative interference cancellation using mixed feedback weights and stabilizing step sizes

Publications (2)

Publication Number Publication Date
WO2007038018A2 WO2007038018A2 (en) 2007-04-05
WO2007038018A3 true WO2007038018A3 (en) 2007-12-13

Family

ID=37900239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/036018 Ceased WO2007038018A2 (en) 2005-09-23 2006-09-15 Iterative interference cancellation using mixed feedback weights and stabilizing step sizes

Country Status (1)

Country Link
WO (1) WO2007038018A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6714585B1 (en) * 1999-06-25 2004-03-30 Ericsson Inc. Rake combining methods and apparatus using weighting factors derived from knowledge of spreading spectrum signal characteristics
US20040196892A1 (en) * 1999-10-19 2004-10-07 Interdigital Technology Corporation Parallel interference cancellation receiver for multiuser detection CDMA signals
US20050163196A1 (en) * 1999-08-31 2005-07-28 Currivan Bruce J. Cancellation of burst noise in a communication system with application to S-CDMA
US20050180364A1 (en) * 2002-09-20 2005-08-18 Vijay Nagarajan Construction of projection operators for interference cancellation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6714585B1 (en) * 1999-06-25 2004-03-30 Ericsson Inc. Rake combining methods and apparatus using weighting factors derived from knowledge of spreading spectrum signal characteristics
US20050163196A1 (en) * 1999-08-31 2005-07-28 Currivan Bruce J. Cancellation of burst noise in a communication system with application to S-CDMA
US20040196892A1 (en) * 1999-10-19 2004-10-07 Interdigital Technology Corporation Parallel interference cancellation receiver for multiuser detection CDMA signals
US20050180364A1 (en) * 2002-09-20 2005-08-18 Vijay Nagarajan Construction of projection operators for interference cancellation

Also Published As

Publication number Publication date
WO2007038018A2 (en) 2007-04-05

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