FI113820B - Förfarande för sökande av en signal som sänds i skurar - Google Patents

Förfarande för sökande av en signal som sänds i skurar Download PDF

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Publication number
FI113820B
FI113820B FI974132A FI974132A FI113820B FI 113820 B FI113820 B FI 113820B FI 974132 A FI974132 A FI 974132A FI 974132 A FI974132 A FI 974132A FI 113820 B FI113820 B FI 113820B
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FI
Finland
Prior art keywords
signal
search
walsh
offset
comb
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Application number
FI974132A
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English (en)
Finnish (fi)
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FI974132A0 (sv
FI974132A (sv
Inventor
Roberto Padovani
Noam A Ziv
Jeffrey A Levin
Kenneth D Easton
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Qualcomm Inc
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Publication of FI974132A0 publication Critical patent/FI974132A0/sv
Publication of FI974132A publication Critical patent/FI974132A/sv
Application granted granted Critical
Publication of FI113820B publication Critical patent/FI113820B/sv

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70751Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70752Partial correlation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70756Jumping within the code, i.e. masking or slewing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/004Orthogonal
    • H04J13/0048Walsh
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/711Interference-related aspects the interference being multi-path interference
    • H04B1/7113Determination of path profile
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/711Interference-related aspects the interference being multi-path interference
    • H04B1/7115Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70703Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Relay Systems (AREA)
  • Radio Transmission System (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Claims (2)

1. Förfarande för mottagande av en signal, vilken innehäller en grupp sprittspektrumanropssigna-ler, som samutnyttjar ett gemensamt frekvensband och 5 väri var och en sprittspektrumanropssignal innehäller en bitserie som är kodad i grupper med fast längd i en teckenserie, väri teckenserien grupperas tillsammans i en effektstyrgrupp och väri vart och ett tecken i en gemensam effektstyrgrupp sänds pä en gemensam effekt-10 nivä och väri effektstyrgrupperna sänds i skurar, och för isolerande av en av anropssignalerna ur gruppen för bestämmande av anropssignalens styrka i en vägför-dröjningstidsförskjutning frän en nollförskjutnings referenstid, kännetecknat därav, att:
15 PN-sekvensens databitar sparas i en PN-sekvensbuffert (176); en första mottagen mängd anropssignalprov sparas i en provbuffert (172), vars storlek är begrän-sad; 20 frän provbufferten (172) hopsamlas en första mängd anropssignalprov med fast längd motsvarande en första mängd PN-sekvens databitar frän ·'·1: PN-sekvensbuf ferten (176) för bildande av en första ...: hopsamlad utgäng; 25 en andra mottagen mängd anropssignalprov spa- ras i provbufferten (172); och frän provbufferten (172) hopsamlas en andra * · • ’ mängd anropsprovsignaler anropssignalprov med fast längd motsvarande en andra vägfördröjningstid med en 30 första mängd PN-sekvens databitar frän PN-sekvensbuf ferten (176) för bildande av en andra hopsaml ad utgäng; och att >·1, tili den andra mängden anropssignalprov med > » ’·' fast längd hör ett stort antal samma anropssignalprov V 1 35 som tili den första mängden anropssignalprov med fast Λ· längd och att längden av den första och den andra mot- tagna mängden anropssignalprov utgör en del av den 61 113820 fasta längden av den första och den andra mängden an-ropssignaler med fast längd; och att tabelleringsskedet av den första och den andra mängden anropssignalprov med fast längd och hop-5 samlingsskedet av den första och den andra mängden anropssignalprov med fast längd utförs oberoende av san-nolikheten, att en av anropssignalerna innehäller en av effektstyrgrupperna.
2. Förfarande för mottagande av en signal, 10 vilken innehäller en grupp sprittspektrumsignaler, som delar pä ett gemensamt frekvensband, och isolerande av en första signal ur gruppen sprittspektrumsignaler för bestämmande av signalstyrkan i en vägfördröjningstid-förskjutning frän nollförskjutningsreferenstiden med 15 en första signal, väri tili den första signalen hör en teckenserie, väri teckenserierna grupperas tillsammans tili en teckenmängd, i vilken vart och ett tecken i den gemensamma teckenmängden sänds pä en fast effekt-nivä, varvid successiva teckenmängder kan sändas pä 20 flera signalniväer, väri tili signalniväerna hör en nollnivä, pä vilken sändandet av den första signalen ; förhindras, kännetecknat därav, att en första mängd anropssignalprov som motsva-rar den första teckenmängden för den första signalen • · 25 med en första förskjutning söks fram för bildande av en första effektberäkning av den; ; en andra mängd anropssignalprov som motsvarar • den första teckenmängden för den första signalen med en första förskjutning söks fram för bildande av en ·· 3 0 andra ef fektberäkning av den; den första och den andra effektberäkningen • , adderas för bildande av en effektniväberäkning av ‘ ' teckenmängden vid den första förskjutningen; en tredje mängd anropssignalprov som motsva-35 rar den andra teckenmängden för den första signalen ; med en andra förskjutning söks fram för bildande av en tredje effektberäkning av den; 62 113820 en fjärde mängd anropssignalprov som motsva-rar den andra teckenmängden för den första signalen med en andra förskjutning söks fram för bildande av en fjärde effektberäkning av den; och 5 den tredje och den fjärde effektuppskattning- en adderas för bildande av en effektniväberäkning av teckenmängden vid den andra förskjutningen; och att den första teckenmängden och den andra teckenmängden motsvarar tidsfortsättande tecken-10 mängder och att sökskedena utförs kontinuerligt obero-ende av den fasta effektnivän. t ► t
FI974132A 1995-05-05 1997-11-04 Förfarande för sökande av en signal som sänds i skurar FI113820B (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/436,029 US5710768A (en) 1994-09-30 1995-05-05 Method of searching for a bursty signal
US43602995 1995-05-05
US9607567 1996-05-02
PCT/US1996/007567 WO1996035268A1 (en) 1995-05-05 1996-05-02 Method of receiving and searching a signal transmitting in bursts

Publications (3)

Publication Number Publication Date
FI974132A0 FI974132A0 (sv) 1997-11-04
FI974132A FI974132A (sv) 1998-01-05
FI113820B true FI113820B (sv) 2004-06-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FI974132A FI113820B (sv) 1995-05-05 1997-11-04 Förfarande för sökande av en signal som sänds i skurar

Country Status (20)

Country Link
US (2) US5710768A (sv)
EP (1) EP0824802B1 (sv)
JP (1) JP3388754B2 (sv)
KR (1) KR100380427B1 (sv)
CN (1) CN1099171C (sv)
AR (1) AR001852A1 (sv)
AT (1) ATE227481T1 (sv)
AU (1) AU699159B2 (sv)
BR (1) BR9608287A (sv)
DE (1) DE69624698T2 (sv)
ES (1) ES2184871T3 (sv)
FI (1) FI113820B (sv)
HK (1) HK1017523A1 (sv)
IL (1) IL118116A (sv)
MX (1) MX9708514A (sv)
MY (1) MY113603A (sv)
RU (1) RU2157592C2 (sv)
TW (1) TW297974B (sv)
WO (1) WO1996035268A1 (sv)
ZA (1) ZA963188B (sv)

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AU699159B2 (en) 1998-11-26
EP0824802B1 (en) 2002-11-06
IL118116A (en) 2000-06-01
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BR9608287A (pt) 1999-06-15
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JP3388754B2 (ja) 2003-03-24
DE69624698D1 (de) 2002-12-12
EP0824802A1 (en) 1998-02-25
US5710768A (en) 1998-01-20
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TW297974B (sv) 1997-02-11
FI974132A0 (sv) 1997-11-04
CN1200850A (zh) 1998-12-02
US5867527A (en) 1999-02-02
AU6145896A (en) 1996-11-21
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ATE227481T1 (de) 2002-11-15
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