CY1107676T1 - Εξουδετερωση παρεμβολων κατα την πολλαπλη προσπελαση cdma με χρηση εκτιμησεως σηματος - Google Patents

Εξουδετερωση παρεμβολων κατα την πολλαπλη προσπελαση cdma με χρηση εκτιμησεως σηματος

Info

Publication number
CY1107676T1
CY1107676T1 CY20051100835T CY051100835T CY1107676T1 CY 1107676 T1 CY1107676 T1 CY 1107676T1 CY 20051100835 T CY20051100835 T CY 20051100835T CY 051100835 T CY051100835 T CY 051100835T CY 1107676 T1 CY1107676 T1 CY 1107676T1
Authority
CY
Cyprus
Prior art keywords
replica
signal
strongest signal
strongest
interference
Prior art date
Application number
CY20051100835T
Other languages
English (en)
Inventor
Jack Holtzman
Dilip G Warrier
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of CY1107676T1 publication Critical patent/CY1107676T1/el

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
    • 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
    • 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
    • H04B1/71072—Successive 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
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B2001/71077—Partial interference cancellation
    • 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
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Αρκετές μέθοδοι και αντίστοιχες συσκευές μειώνουν τις παρεμβολές πολλαπλής προσπελάσεως σε συστήματα επικοινωνιών (100) πολλαπλής προσπελάσεως με διαίρεση κώδικα, μέσω τεχνικών εξουδετερώσεως παρεμβολών. Σχηματίζεται μία εκτίμηση της αξιοπιστίας εξουδετερώσεως ενός ισχυρότερου σήματος παρεμβολής, από την ανάλυση ενός πιλοτικού σήματος που συνδυάζεται με το ισχυρότερο σήμα. Η εκτίμηση χρησιμοποιείται για να εξαχθεί μία στάθμιση η οποία πολλαπλασιάζεται με ένα αντίγραφο του ισχυρότερου σήματος ώστε να παρασχεθεί ένα σταθμισμένο αντίγραφο. Το σταθμισμένο αντίγραφο αφαιρείται από μία καθυστερημένη έκδοση του λαμβανόμενου διαύλου. Ως αποτέλεσμα, υλοποιείται σθεναρά η εξουδετέρωση παρεμβολών όταν το ισχυρότερο αντίγραφο σήματος είναι το πιθανότερο να είναι ακριβές, και δεν υλοποιείται σθεναρά όταν το ισχυρότερο αντίγραφο σήματος δεν είναι πιθανόν να είναι ακριβές. Αυτό αποτρέπει το συνδυασμό ενός αντιγράφου του ισχυρότερου σήματος με το λαμβανόμενο δίαυλο, όταν είναι πιθανότερο να συμβάλλει το αντίγραφο σε επιπρόσθετη παρεμβολή αντί να την μειώνει.
CY20051100835T 1999-07-19 2005-07-08 Εξουδετερωση παρεμβολων κατα την πολλαπλη προσπελαση cdma με χρηση εκτιμησεως σηματος CY1107676T1 (el)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/356,610 US6404760B1 (en) 1999-07-19 1999-07-19 CDMA multiple access interference cancellation using signal estimation
EP00948765A EP1201042B1 (en) 1999-07-19 2000-07-18 Cdma multiple access interference cancellation using signal estimation

Publications (1)

Publication Number Publication Date
CY1107676T1 true CY1107676T1 (el) 2013-04-18

Family

ID=23402181

Family Applications (1)

Application Number Title Priority Date Filing Date
CY20051100835T CY1107676T1 (el) 1999-07-19 2005-07-08 Εξουδετερωση παρεμβολων κατα την πολλαπλη προσπελαση cdma με χρηση εκτιμησεως σηματος

Country Status (15)

Country Link
US (1) US6404760B1 (el)
EP (3) EP2224604B1 (el)
JP (1) JP4668490B2 (el)
KR (1) KR100784739B1 (el)
CN (1) CN1182659C (el)
AT (1) ATE293308T1 (el)
AU (1) AU6221700A (el)
BR (1) BR0012541A (el)
CY (1) CY1107676T1 (el)
DE (1) DE60019429T2 (el)
DK (1) DK1201042T3 (el)
ES (1) ES2241627T3 (el)
HK (1) HK1047832B (el)
PT (1) PT1201042E (el)
WO (1) WO2001006664A2 (el)

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KR20020011457A (ko) 2002-02-08
EP2224604A1 (en) 2010-09-01
PT1201042E (pt) 2005-06-30
ES2241627T3 (es) 2005-11-01
EP1432134A3 (en) 2009-04-15
EP2224604B1 (en) 2013-08-21
EP1432134A2 (en) 2004-06-23
EP1432134B1 (en) 2013-06-19
AU6221700A (en) 2001-02-05
CN1375131A (zh) 2002-10-16
DE60019429T2 (de) 2006-03-09
KR100784739B1 (ko) 2007-12-13
JP2003505915A (ja) 2003-02-12
DK1201042T3 (da) 2005-06-20
WO2001006664A2 (en) 2001-01-25
US6404760B1 (en) 2002-06-11
WO2001006664A3 (en) 2001-05-17
HK1047832B (zh) 2005-07-29
ATE293308T1 (de) 2005-04-15
JP4668490B2 (ja) 2011-04-13
HK1047832A1 (en) 2003-03-07
EP1201042B1 (en) 2005-04-13
BR0012541A (pt) 2002-11-26
CN1182659C (zh) 2004-12-29
EP1201042A2 (en) 2002-05-02
DE60019429D1 (de) 2005-05-19

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