DE69721991T2 - Effiziente mehrkanalfilterung für cdma-modems - Google Patents

Effiziente mehrkanalfilterung für cdma-modems Download PDF

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Publication number
DE69721991T2
DE69721991T2 DE69721991T DE69721991T DE69721991T2 DE 69721991 T2 DE69721991 T2 DE 69721991T2 DE 69721991 T DE69721991 T DE 69721991T DE 69721991 T DE69721991 T DE 69721991T DE 69721991 T2 DE69721991 T2 DE 69721991T2
Authority
DE
Germany
Prior art keywords
filter
memory
channel
output
channels
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.)
Expired - Lifetime
Application number
DE69721991T
Other languages
German (de)
English (en)
Other versions
DE69721991D1 (de
Inventor
T. Robert REGIS
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.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
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 InterDigital Technology Corp filed Critical InterDigital Technology Corp
Publication of DE69721991D1 publication Critical patent/DE69721991D1/de
Application granted granted Critical
Publication of DE69721991T2 publication Critical patent/DE69721991T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0223—Computation saving measures; Accelerating measures
    • H03H17/0225—Measures concerning the multipliers
    • H03H17/0226—Measures concerning the multipliers comprising look-up tables
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70753—Partial phase search
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70755—Setting of lock conditions, e.g. threshold
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70758—Multimode search, i.e. using multiple search strategies
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/708—Parallel implementation
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • 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
    • 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
    • H04B2201/70707—Efficiency-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Communication Control (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Telephonic Communication Services (AREA)
  • Circuits Of Receivers In General (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Networks Using Active Elements (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE69721991T 1996-06-27 1997-06-24 Effiziente mehrkanalfilterung für cdma-modems Expired - Lifetime DE69721991T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US670160 1996-06-27
US08/670,160 US6487190B1 (en) 1996-06-27 1996-06-27 Efficient multichannel filtering for CDMA modems
PCT/US1997/010909 WO1997050173A1 (en) 1996-06-27 1997-06-24 Efficient multichannel filtering for cdma modems

Publications (2)

Publication Number Publication Date
DE69721991D1 DE69721991D1 (de) 2003-06-18
DE69721991T2 true DE69721991T2 (de) 2004-05-19

Family

ID=24689238

Family Applications (3)

Application Number Title Priority Date Filing Date
DE69721991T Expired - Lifetime DE69721991T2 (de) 1996-06-27 1997-06-24 Effiziente mehrkanalfilterung für cdma-modems
DE0908008T Pending DE908008T1 (de) 1996-06-27 1997-06-24 Effiziente mehrkanalfilterung für cdma-modems
DE69736444T Expired - Lifetime DE69736444T2 (de) 1996-06-27 1997-06-24 Effiziente Mehrkanalfilterung für CDMA-Modems

Family Applications After (2)

Application Number Title Priority Date Filing Date
DE0908008T Pending DE908008T1 (de) 1996-06-27 1997-06-24 Effiziente mehrkanalfilterung für cdma-modems
DE69736444T Expired - Lifetime DE69736444T2 (de) 1996-06-27 1997-06-24 Effiziente Mehrkanalfilterung für CDMA-Modems

Country Status (13)

Country Link
US (3) US6487190B1 (US06487190-20021126-M00005.png)
EP (3) EP1739832A3 (US06487190-20021126-M00005.png)
JP (1) JP3550598B2 (US06487190-20021126-M00005.png)
KR (1) KR100383266B1 (US06487190-20021126-M00005.png)
CN (1) CN1117431C (US06487190-20021126-M00005.png)
AT (2) ATE240611T1 (US06487190-20021126-M00005.png)
AU (1) AU3499697A (US06487190-20021126-M00005.png)
CA (2) CA2434522A1 (US06487190-20021126-M00005.png)
DE (3) DE69721991T2 (US06487190-20021126-M00005.png)
DK (1) DK0908008T3 (US06487190-20021126-M00005.png)
ES (2) ES2137908T3 (US06487190-20021126-M00005.png)
HK (2) HK1017175A1 (US06487190-20021126-M00005.png)
WO (1) WO1997050173A1 (US06487190-20021126-M00005.png)

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EP0935189B1 (en) * 1998-02-04 2005-09-07 Texas Instruments Incorporated Reconfigurable co-processor with multiple multiply-accumulate units
EP1039635B1 (en) * 1999-03-20 2007-09-12 Freescale Semiconductor, Inc. Multi channel filtering device and method
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US7185036B1 (en) * 2002-05-03 2007-02-27 Atheros Communications, Inc. Look up table based upsampling and digital filtering
US7808937B2 (en) 2005-04-07 2010-10-05 Rambus, Inc. Variable interference cancellation technology for CDMA systems
US8761321B2 (en) 2005-04-07 2014-06-24 Iii Holdings 1, Llc Optimal feedback weighting for soft-decision cancellers
US7876810B2 (en) 2005-04-07 2011-01-25 Rambus Inc. Soft weighted interference cancellation for CDMA systems
US7715508B2 (en) 2005-11-15 2010-05-11 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
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US7263541B2 (en) 2003-01-28 2007-08-28 Agere Systems Inc. Multi-dimensional hybrid and transpose form finite impulse response filters
GB2399962B (en) * 2003-03-27 2005-12-21 Advanced Risc Mach Ltd Data filtering
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US7386581B2 (en) * 2003-12-31 2008-06-10 Stmicroelectronics, Inc. Performance FIR filter
US7366746B2 (en) * 2004-02-12 2008-04-29 Xerox Corporation Finite impulse response filter method and apparatus
US7987222B1 (en) * 2004-04-22 2011-07-26 Altera Corporation Method and apparatus for implementing a multiplier utilizing digital signal processor block memory extension
US7116705B2 (en) * 2004-11-08 2006-10-03 Interdigital Technology Corporation Method and apparatus for reducing the processing rate of a chip-level equalization receiver
US7991088B2 (en) * 2005-11-15 2011-08-02 Tommy Guess Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7826516B2 (en) 2005-11-15 2010-11-02 Rambus Inc. Iterative interference canceller for wireless multiple-access systems with multiple receive antennas
US7711075B2 (en) 2005-11-15 2010-05-04 Tensorcomm Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7702048B2 (en) * 2005-11-15 2010-04-20 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US20070112901A1 (en) * 2005-11-15 2007-05-17 Afshin Niktash Configurable digital filter
US20070110135A1 (en) 2005-11-15 2007-05-17 Tommy Guess Iterative interference cancellation for MIMO-OFDM receivers
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US8588253B2 (en) 2008-06-26 2013-11-19 Qualcomm Incorporated Methods and apparatuses to reduce context switching during data transmission and reception in a multi-processor device
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US9900028B1 (en) * 2017-03-03 2018-02-20 Synaptics Incorporated Decimation filtering in systems having parallel analog-to-digital converter channels

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Also Published As

Publication number Publication date
EP0908008A1 (en) 1999-04-14
CN1117431C (zh) 2003-08-06
DE69736444D1 (de) 2006-09-14
AU3499697A (en) 1998-01-14
US20050223049A1 (en) 2005-10-06
US7631027B2 (en) 2009-12-08
DE69721991D1 (de) 2003-06-18
DE69736444T2 (de) 2007-08-02
ES2137908T1 (es) 2000-01-01
ATE240611T1 (de) 2003-05-15
EP0908008B1 (en) 2003-05-14
JPH11513213A (ja) 1999-11-09
EP1337040A1 (en) 2003-08-20
KR100383266B1 (ko) 2003-08-25
CA2434522A1 (en) 1997-12-31
EP1739832A3 (en) 2007-12-26
ES2137908T3 (es) 2004-02-16
KR20000022282A (ko) 2000-04-25
HK1059992A1 (en) 2004-07-23
ES2268207T3 (es) 2007-03-16
DK0908008T3 (da) 2003-09-15
DE908008T1 (de) 1999-10-21
EP1739832A2 (en) 2007-01-03
US6487190B1 (en) 2002-11-26
CA2259261A1 (en) 1997-12-31
EP1337040B1 (en) 2006-08-02
US6907024B2 (en) 2005-06-14
CA2259261C (en) 2003-10-21
CN1223754A (zh) 1999-07-21
US20030099284A1 (en) 2003-05-29
HK1017175A1 (en) 1999-11-12
JP3550598B2 (ja) 2004-08-04
ATE335304T1 (de) 2006-08-15
WO1997050173A1 (en) 1997-12-31

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