FI115430B - Fjärrenhet och förfarande för mottagning av en vald CDMA-sprittspektrum-kanalsignal - Google Patents
Fjärrenhet och förfarande för mottagning av en vald CDMA-sprittspektrum-kanalsignal Download PDFInfo
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- FI115430B FI115430B FI970276A FI970276A FI115430B FI 115430 B FI115430 B FI 115430B FI 970276 A FI970276 A FI 970276A FI 970276 A FI970276 A FI 970276A FI 115430 B FI115430 B FI 115430B
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- signal
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- 238000001228 spectrum Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000003111 delayed effect Effects 0.000 claims description 21
- 230000007480 spreading Effects 0.000 abstract description 7
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- 238000013459 approach Methods 0.000 description 1
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Classifications
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- 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
-
- 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
- H04B1/709—Correlator structure
-
- 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
- H04B1/709—Correlator structure
- H04B1/7093—Matched filter type
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
- Paper (AREA)
- Holo Graphy (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Radio Relay Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Optical Communication System (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Claims (16)
1. Fjärrenhet för mottagning av en vald CDMA-spritt-spektrum-kanalsignal bland en mangfald CDMA-spritt-spektrum-5 kanalsignaler i en spritt-spektrumsignal, vilken fjärrenhet är försedd med medel (41) för mottagning av spritt-spektrumsignalen, vilken fjärrenhet kännetecknas av: medel (611) för att samla den mottagna spritt-spektrumsignalen för varje signal i mängfalden av 10 kanalsignaler för att skapa ett första estimat av en serie estimat för varje kanalsignal; medel (612, 613, 614) för att skapa de äterstäende estimaten i serien för varje kanal genom att ett valt antal ganger upprepa proceduren att för alla andra kanaler samla 15 ett tidigare estimat för att skapa samlade signaler för de andra kanalerna och subtrahera de samlade andra kanalsignalerna frän den mottagna signalen och samla resultatet av subtraktionen för att skapa nasta estimat för varje kanal; och 20 medel (615, 616, 617, 618, 619, 620) för att kombinera serien av estimat för den valda kanalsignalen sä att en interferensfri utsignal skapas.
» : 2. Fjärrenhet enligt patentkrav 1, kännetecknad av, att 25 kombineringsmedlen (615, 616, 617, 618, 619, 620) vidare :‘.t> omfattar medel (615, 617, 619) för summering av serien estimat för den valda kanalen sä att en interferensfri
3. Fjärrenhet enligt patentkrav 2, kännetecknad av, att ;·’ kombineringsmedlen (615, 616, 617, 618, 619, 620) vidare f! omfattar medel (615, 617, 619) för multiplikation av serien *; *; estimat för den valda kanalen med en faktor innan summeringen utförs. i '! 35 » * > * 9 · • I 30 1 1 5430
4. Fjärrenhet enligt patentkrav 2, kännetecknad av, att kombineringsmedlen (615, 616, 617, 618, 619, 620) vidare omfattar medel (615, 617, 619) för multiplikation av nästa estimat i serien estimat för den valda kansien med en faktor 5 vars värde är hälften av värdet hos faktorn för det föregäende estimatet.
5. Fjärrenhet enligt patentkrav 1, kännetecknad av medel (48) för fördröjning av nästa estimat för varje kanal i 10 förhällande tili det föregäende estimatet för samma kanal.
6. Fjärrenhet enligt patentkrav 5, kännetecknad av ett fördröjningsmedel (48) för fördröjning av nästa estimat med en tidsfördröjning uppgäende tili en bit. 15
7. Fjärrenhet enligt patentkrav 1, kännetecknad av, att kombineringsmedlen (615, 616, 617, 618, 619, 620) vidare omfattar medel (615, 617, 619) för beräkning av medelvärdet för serien estimat för den valda kanalen sä att en 20 interferensfri utsignal skapas.
8. Fjärrenhet enligt patentkrav 1, kännetecknad av, att varje serie estimat är tvä estimat. ·. 25 9. Forfarande för användning i en fjärrenhet för mottagning av en vald CDMA-spritt-spektrum-kanalsignal bland en mangfald CDMA-spritt-spektrum-kanalsignaler i en spritt- * I spektrumsignal varvid fjärrenheten mottar spritt-spektrumsignalen, vilket forfarande kännetecknas av: 30 samling av den mottagna spritt-spektrumsignalen för varje signal i mängfalden av kanalsignaler för att skapa ett • första estimat av en serie estimat för varje kanalsignal; .k alstring av de aterstaende estimaten i serien för varje kanal genom att ett valt antal ganger upprepa proceduren att •j 35 för alla andra kanaler samla ett tidigare estimat för att > · 31 1 1 5430 skapa samlade signaler för de andra kanalerna och subtrahera de samlade andra kanalsignalerna frän den mottagna signalen och samla resultatet av subtraktionen för att skapa nästa estimat för varje kanal; och 5 kombinering av serien av estimat för den valda kanalsignalen sä att en interferensfri utsignal skapas.
9. I utsignal skapas.
10. Förfarande enligt patentkrav 9, kännetecknat av, att kombineringsfasen omfattar summering av serien estimat för 10 den valda kanalen sä att en interferensfri utsignal skapas.
11. Förfarande enligt patentkrav 10, kännetecknat av, att serien estimat för den valda kanalen multipliceras med en faktor innan summeringen utförs. 15
12. Förfarande enligt patentkrav 11, kännetecknat av, att nasta estimat i serien estimat för den valda kanalen multipliceras med en faktor vars värde är hälften av värdet hos faktorn för det föregäende estimatet. 20
13. Förfarande enligt patentkrav 9, kännetecknat av, att • ,! nasta estimat för varje kanal fördröjs i förhällande tili i . det föregäende estimatet för samma kanal. i « t s | . 25
14. Förfarande enligt patentkrav 13, kännetecknat av, att nästa estimat fördröjs med en tidsfördröjning uppgäende tili '>:’m en bit. « * #
15. Förfarande enligt patentkrav 9, kännetecknat av, att ·;;; 30 kombineringsfasen omfattar beräkning av medelvärdet för '-** serien estimat för den valda kanalen sä att en * interferensf ri utsignal skapas. • I S i » k »
16. Förfarande enligt patentkrav 9, kännetecknat av, att - ·’ 35 varje serie estimat är tvä estimat. * » i * * t a * * »
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27947794 | 1994-07-26 | ||
| US08/279,477 US5553062A (en) | 1993-04-22 | 1994-07-26 | Spread spectrum CDMA interference canceler system and method |
| PCT/US1995/009652 WO1996003819A1 (en) | 1994-07-26 | 1995-07-05 | Spread spectrum interference canceler system and method |
| US9509652 | 1995-07-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI970276A FI970276A (sv) | 1997-01-23 |
| FI970276A0 FI970276A0 (sv) | 1997-01-23 |
| FI115430B true FI115430B (sv) | 2005-04-29 |
Family
ID=23069142
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI970276A FI115430B (sv) | 1994-07-26 | 1997-01-23 | Fjärrenhet och förfarande för mottagning av en vald CDMA-sprittspektrum-kanalsignal |
| FI20050232A FI117612B (sv) | 1994-07-26 | 2005-03-01 | Mottagare och förfarande för mottagning av spritt-spektrumkanalsignaler inom en spritt-spektrumsignal |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20050232A FI117612B (sv) | 1994-07-26 | 2005-03-01 | Mottagare och förfarande för mottagning av spritt-spektrumkanalsignaler inom en spritt-spektrumsignal |
Country Status (16)
| Country | Link |
|---|---|
| US (15) | US5553062A (sv) |
| EP (3) | EP1860811B1 (sv) |
| JP (2) | JP3153894B2 (sv) |
| CN (8) | CN1503493B (sv) |
| AT (3) | ATE224618T1 (sv) |
| AU (1) | AU701816B2 (sv) |
| BR (2) | BR9510804B1 (sv) |
| CA (4) | CA2552443C (sv) |
| DE (6) | DE69535594T2 (sv) |
| DK (6) | DK0772928T3 (sv) |
| ES (3) | ES2137140T3 (sv) |
| FI (2) | FI115430B (sv) |
| HK (7) | HK1030697A1 (sv) |
| NZ (2) | NZ290723A (sv) |
| SE (5) | SE532856C2 (sv) |
| WO (1) | WO1996003819A1 (sv) |
Families Citing this family (181)
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1999
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2000
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2002
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