FI106897B - RAKE-mottagare - Google Patents

RAKE-mottagare Download PDF

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Publication number
FI106897B
FI106897B FI981977A FI981977A FI106897B FI 106897 B FI106897 B FI 106897B FI 981977 A FI981977 A FI 981977A FI 981977 A FI981977 A FI 981977A FI 106897 B FI106897 B FI 106897B
Authority
FI
Finland
Prior art keywords
antenna
signal
rake
branch
branches
Prior art date
Application number
FI981977A
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English (en)
Finnish (fi)
Other versions
FI981977A (sv
FI981977A0 (sv
Inventor
Juha Ylitalo
Peter Muszynski
Esa Tiirola
Original Assignee
Nokia Networks Oy
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 Nokia Networks Oy filed Critical Nokia Networks Oy
Publication of FI981977A0 publication Critical patent/FI981977A0/sv
Priority to FI981977A priority Critical patent/FI106897B/sv
Priority to CN99801590A priority patent/CN1131600C/zh
Priority to ES99944664T priority patent/ES2258853T3/es
Priority to PCT/FI1999/000749 priority patent/WO2000016494A1/en
Priority to AU57491/99A priority patent/AU5749199A/en
Priority to JP2000570913A priority patent/JP2002525905A/ja
Priority to EP99944664A priority patent/EP1040591B1/en
Priority to DE69930527T priority patent/DE69930527T2/de
Priority to AT99944664T priority patent/ATE321379T1/de
Publication of FI981977A publication Critical patent/FI981977A/sv
Priority to NO20002221A priority patent/NO20002221L/no
Priority to US09/571,138 priority patent/US6215814B1/en
Application granted granted Critical
Publication of FI106897B publication Critical patent/FI106897B/sv

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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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • 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
    • 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
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • 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
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709727—GRAKE type RAKE receivers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Lock And Its Accessories (AREA)

Claims (12)

1. RAKE-mottagare, som omfattar: ätminstone tva antenngrenar (232A, 232B) för mottagning av en radiosignal; 5 ätminstone en RAKE-gren (270A, 270B), som kopplats till antenn- grenarna (232A, 232B), för behandling av radiosignalens flervägsutbredda signalkomponent; en fördröjningsestimator (260), som kopplats till antenngrenarna (232A, 232B), för sökning av en fördröjning för ätminstone en flervägsutbredd 10 signalkomponent och för allokering av RAKE-grenen (270A, 270B) för behandling av den funna flervägsutbredda signaikomponenten och för medde-lande av den funna fördröjningen tili den ifrägavarande RAKE-grenen (270A, 270B); RAKE-grenen (270A, 270B), som omfattar: 15 en kanalestimator (272) för bildning av ett impulssvar för en kanal i den flervägsutbredda signaikomponenten, som funnits med hjälp av en känd pilotdel, som radiosignalen i varje antenngren (232A, 232B) innehäller; en interferensestimator (272) för bildning av en interferenssignal, som radiosignalen i varje antenngren (232A, 232B) innehäller och som bildats 20 av interferens och brus, genom att subtrahera frän den mottagna radiosignalen en regenererad önskad radiosignal, vilken regenererad önskad radiosignal erhälls med hjälp av den kända pilotdelen samt kanalens estimerade impulssvar; en sammanfattare (despreader) (276A, 276B), som kopplats tili • « 25 varje antenngren (232A, 232B), för avlägsnande av en utbredning av en pilotdel (274A), som den flervägsutbredda signaikomponenten innehäller, genom att använda en känd spridningskod med en fördröjning meddelad av fördröj-ningsestimatorn (260); en sammanfattare (despreader) (276C, 276D), som kopplats tili : 30 varje antenngren (232A, 232B), för avlägsnande av en utbredning av en data- - · del (274B), som den flervägsutbredda signaikomponenten innehäller, genom att använda en känd spridningskod med en fördröjning meddelad av fördröj-ningsestimatorn (260), . kännetecknadavatt
35 RAKE-grenen (270A, 270B) ytterligare omfattar: en vägningstaldel (272) för bildning av i förhällande tili signalen för 106897 22 interferens och brus (SINR) maximerande vägningstal för varje antenngren (232A, 232B); en multiplikator (284A, 284B) för multiplicering med ett vägningstal en pilotdel (274A), som avlägsnats frän utbredningen av sammanfattaren 5 (despreader) (276A, 276B) i varje antenngren (232A, 232B); en multiplikator (284C, 284D) för multiplicering med ett vägningstal en datadel (274B), som avlägsnats frän utbredningen av sammanfattaren (despreader) (276C, 276D) i varje antenngren (232A, 232B); en antenngrenadderare (278A) för sammanföring av via olika an-10 tenngrenar (232A, 232B) mottagna, frän utbredningen avlägsnade och med ett vägningstal multiplicerade pilotdelar (274A) tili en pilotsignal; en antenngrenadderare (278B) för sammanföring av via olika an-tenngrenar (232A, 232B) mottagna, frän utbredningen avlägsnade och med ett vägningstal multiplicerade datadelar (274B) tili en datasignal; 15 och RAKE-mottagaren ytterligare omfattar en RAKE-grenadderare (280B) för sammanföring av med olika fördröjningar fungerande RAKE-grenars (270A, 270B) datasignaler tili en summadatasignal, som representerar mottagna bitar.
2. RAKE-mottagare enligt patentkrav l.kännetecknad avatt 20 den omfattar en RAKE-grenadderare (280A) för sammanföring av de med olika fördröjningar fungerande RAKE-grenarnas (270A, 270B) pilotsignaler tili summapilotsignaler, som representerar mottagna pilotbitar.
3. RAKE-mottagare enligt patentkrav 2,kännetecknad avatt summapilotsignalen förs tili en estimator (282) av signal/interferens- *: 25 förhällandet, i vilken kanalens signal/interferens-förhällande estimeras.
4. RAKE-mottagare enligt patentkrav 3, kännetecknad avatt effektregleringen av en sluten slinga styrs med det erhällna signal/interferens-förhällandet av den ifrägavarande kanalen.
5. RAKE-mottagare enligt patentkrav l.kännetecknad avatt 30 fördröjningsestimatorn (260) omfattar: ·’ ett filter (262A, 262B), som anordnats i varje antenngren (232A, 232B), för utförande av ett förut känt antal parallella korrelationskalkyleringar för den mottagna radiosignalen med olika fördröjningar, i vilken korrela-tionskalkylering avlägsnas utbredningen av pilotdelen, som den mottagna ra-35 diosignalen innehäller, med den kända spridningskoden genom att använda en förutbestämd fördröjning; 23 106897 en allokerare (264) för väljande av ätminstone en fördröjning pä basis av för varje antenngren (232A, 232B) kalkylerade korrelationer, med vilken mottas den flervägsutbredda signalkomponenten, och för allokering av RAKE-grenen (270A, 270B) genom att meddela den funna fördröjningen tili den.
6. RAKE-mottagare enligt patentkrav 1,kännetecknad av att antenngrenarna (232A, 232B) bildar för ästadkommande av en antennför-stärkning en antenngrupp, med vilken en antennlob genom synkronisering av enskilda antennsignaler riktas i en önskad riktning.
7. RAKE-mottagare enligt patentkrav 1,kännetecknad av att 10 antenngrenarna (232A, 232B) är diversitetsgrenar.
8. RAKE-mottagare enligt patentkrav 1,kännetecknad av att antenngrenarna (232A, 232B) är med rumsdiversitet realiserade antenner.
9. RAKE-mottagare enligt patentkrav 1,kännetecknad av att antenngrenarna (232A, 232B) är med polarisationsdiversitet realiserade an- 15 tenner.
10. RAKE-mottagare enligt patentkrav 1,kännetecknad av att kanalestimatorn (272) utför kanalestimeringen enligt den optimala Maximum Likelihood-principen.
11. RAKE-mottagare enligt patentkrav 1,kännetecknad av 20 att de i förhallande tili signalen för interferens och brus maximerande väg- ningstalen för varje antenngren (232A, 232B) bildas genom att multiplicera en inverterad matris av en koverensmatris, som bildats av antenngrenarnas (232A, 232B) interferenssignal, med kanalens estimerade impulssvar.
12. RAKE-mottagare enligt patentkrav 11,kännetecknad av ··: 25 att kanalestimatet, som bildats med det optimala Maximum Likeiihood- förfarandet, utnyttjas i estimeringen av koverensmatrisen, som bildats av interferens och brus. « ·
FI981977A 1998-09-14 1998-09-14 RAKE-mottagare FI106897B (sv)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FI981977A FI106897B (sv) 1998-09-14 1998-09-14 RAKE-mottagare
EP99944664A EP1040591B1 (en) 1998-09-14 1999-09-14 Rake receiver
ES99944664T ES2258853T3 (es) 1998-09-14 1999-09-14 Receptor rake.
PCT/FI1999/000749 WO2000016494A1 (en) 1998-09-14 1999-09-14 Rake receiver
AU57491/99A AU5749199A (en) 1998-09-14 1999-09-14 Rake receiver
JP2000570913A JP2002525905A (ja) 1998-09-14 1999-09-14 レーキ受信器
CN99801590A CN1131600C (zh) 1998-09-14 1999-09-14 瑞克接收机
DE69930527T DE69930527T2 (de) 1998-09-14 1999-09-14 Rake-Empfänger
AT99944664T ATE321379T1 (de) 1998-09-14 1999-09-14 Rake-empfänger
NO20002221A NO20002221L (no) 1998-09-14 2000-04-28 RAKE-mottaker
US09/571,138 US6215814B1 (en) 1998-09-14 2000-05-15 RAKE receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981977A FI106897B (sv) 1998-09-14 1998-09-14 RAKE-mottagare
FI981977 1998-09-14

Publications (3)

Publication Number Publication Date
FI981977A0 FI981977A0 (sv) 1998-09-14
FI981977A FI981977A (sv) 2000-03-15
FI106897B true FI106897B (sv) 2001-04-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FI981977A FI106897B (sv) 1998-09-14 1998-09-14 RAKE-mottagare

Country Status (11)

Country Link
US (1) US6215814B1 (sv)
EP (1) EP1040591B1 (sv)
JP (1) JP2002525905A (sv)
CN (1) CN1131600C (sv)
AT (1) ATE321379T1 (sv)
AU (1) AU5749199A (sv)
DE (1) DE69930527T2 (sv)
ES (1) ES2258853T3 (sv)
FI (1) FI106897B (sv)
NO (1) NO20002221L (sv)
WO (1) WO2000016494A1 (sv)

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ATE321379T1 (de) 2006-04-15
WO2000016494A1 (en) 2000-03-23
DE69930527D1 (de) 2006-05-11
JP2002525905A (ja) 2002-08-13
DE69930527T2 (de) 2007-03-08
FI981977A (sv) 2000-03-15
US6215814B1 (en) 2001-04-10
FI981977A0 (sv) 1998-09-14
AU5749199A (en) 2000-04-03
CN1277759A (zh) 2000-12-20
CN1131600C (zh) 2003-12-17
NO20002221L (no) 2000-05-12
ES2258853T3 (es) 2006-09-01

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