WO2000045518A3 - Method and apparatus for reducing peak-to-average ratio in a cdma communication system - Google Patents

Method and apparatus for reducing peak-to-average ratio in a cdma communication system Download PDF

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Publication number
WO2000045518A3
WO2000045518A3 PCT/US2000/002292 US0002292W WO0045518A3 WO 2000045518 A3 WO2000045518 A3 WO 2000045518A3 US 0002292 W US0002292 W US 0002292W WO 0045518 A3 WO0045518 A3 WO 0045518A3
Authority
WO
WIPO (PCT)
Prior art keywords
auxiliary pilot
present
pilot channels
average ratio
reducing peak
Prior art date
Application number
PCT/US2000/002292
Other languages
French (fr)
Other versions
WO2000045518A2 (en
Inventor
Serge Willenegger
Jack M Holtzman
Abhijit Shanbhag
Original Assignee
Qualcomm Inc
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 Inc filed Critical Qualcomm Inc
Priority to JP2000596669A priority Critical patent/JP2002536864A/en
Priority to CNB008031622A priority patent/CN1196273C/en
Priority to DE60036605T priority patent/DE60036605T2/en
Priority to EP00908418A priority patent/EP1147618B1/en
Priority to AU29765/00A priority patent/AU2976500A/en
Publication of WO2000045518A2 publication Critical patent/WO2000045518A2/en
Publication of WO2000045518A3 publication Critical patent/WO2000045518A3/en
Priority to HK02103351A priority patent/HK1041750A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • 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
    • 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
    • H04B2201/70706—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with means for reducing the peak-to-average power ratio

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The present invention is a novel and improved method and apparatus for reducing peak to average ratio in a system using auxiliary pilot channels as described in the TIA/EIA TR45.5 'cdma2000 ITU-R RTT Candidate Submission' to the ITU for consideration in the third generation wireless communication systems. A first method proposed in the present invention to deal with the above stated problem is to alter the phase of the auxiliary pilot channels to reduce to prevent the auxiliary pilot channels from adding constructively. A second method proposed in the present invention to deal with the above stated problem is to gate out the portion of the auxiliary pilot channels that add constructively. The present invention also proposes a novel demodulator design for receiving signals using the modified auxiliary pilot signals.
PCT/US2000/002292 1999-01-28 2000-01-28 Method and apparatus for reducing peak-to-average ratio in a cdma communication system WO2000045518A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2000596669A JP2002536864A (en) 1999-01-28 2000-01-28 Apparatus and method for reducing peak / average rate in CDMA communication
CNB008031622A CN1196273C (en) 1999-01-28 2000-01-28 Method and apparatus for reducing peak-to-average ratio in a CDMA communication system
DE60036605T DE60036605T2 (en) 1999-01-28 2000-01-28 METHOD AND DEVICE FOR REDUCING THE MAXIMUM MEDIUM POWER IN A CDMA COMMUNICATION ARRANGEMENT
EP00908418A EP1147618B1 (en) 1999-01-28 2000-01-28 Method and apparatus for reducing peak-to-average ratio in a cdma communication system
AU29765/00A AU2976500A (en) 1999-01-28 2000-01-28 Method and apparatus for reducing peak-to-average ratio in cdma communication system
HK02103351A HK1041750A1 (en) 1999-01-28 2002-05-03 Method and apparatus for reducing peak-to-average ration in a cdma communication system.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/239,449 US6721349B1 (en) 1999-01-28 1999-01-28 Method and apparatus for reducing peak-to-average ratio in a CDMA communication system
US09/239,449 1999-01-28

Publications (2)

Publication Number Publication Date
WO2000045518A2 WO2000045518A2 (en) 2000-08-03
WO2000045518A3 true WO2000045518A3 (en) 2000-11-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/002292 WO2000045518A2 (en) 1999-01-28 2000-01-28 Method and apparatus for reducing peak-to-average ratio in a cdma communication system

Country Status (10)

Country Link
US (1) US6721349B1 (en)
EP (2) EP1858171B1 (en)
JP (2) JP2002536864A (en)
KR (1) KR100740738B1 (en)
CN (1) CN1196273C (en)
AT (2) ATE375031T1 (en)
AU (1) AU2976500A (en)
DE (2) DE60045053D1 (en)
HK (1) HK1041750A1 (en)
WO (1) WO2000045518A2 (en)

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US7894402B2 (en) * 2005-04-15 2011-02-22 Alcatel-Lucent Usa Inc. High rate packet data spatial division multiple access (SDMA)
US20070058752A1 (en) * 2005-07-29 2007-03-15 Faraday Technology Corp. Methods and systems for estimating sampling frequency offset of OFDM symbols
CN101060344B (en) * 2006-04-19 2010-05-12 大唐移动通信设备有限公司 Medium-frequency crest suppression method and system for time-division synchronization code division-multiple-access system
US7848446B2 (en) * 2006-09-27 2010-12-07 Telefonaktiebolaget L M Ericsson (Publ) Reduction of peak-to-average-power ratio in a telecommunications system
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US8331488B2 (en) 2009-10-13 2012-12-11 Qualcomm Incorporated Methods and apparatus for communicating information using non-coherent and coherent modulation
CN101841349B (en) * 2010-04-12 2013-04-03 北京理工大学 Method for inhibiting MPSK narrowband interference of direct sequence spread spectrum system (DSSS)
US11032061B2 (en) * 2018-04-27 2021-06-08 Microsoft Technology Licensing, Llc Enabling constant plaintext space in bootstrapping in fully homomorphic encryption
US11764940B2 (en) 2019-01-10 2023-09-19 Duality Technologies, Inc. Secure search of secret data in a semi-trusted environment using homomorphic encryption
CN109635940B (en) * 2019-01-28 2021-04-06 深兰人工智能芯片研究院（江苏）有限公司 Image processing method and image processing device based on convolutional neural network
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US20230155624A1 (en) * 2021-11-12 2023-05-18 POSTECH Research and Business Development Transceiver and operating method thereof

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Also Published As

Publication number Publication date
HK1041750A1 (en) 2002-07-19
WO2000045518A2 (en) 2000-08-03
CN1338157A (en) 2002-02-27
JP2002536864A (en) 2002-10-29
EP1147618A2 (en) 2001-10-24
DE60036605T2 (en) 2008-07-03
KR20010101758A (en) 2001-11-14
ATE375031T1 (en) 2007-10-15
DE60045053D1 (en) 2010-11-11
DE60036605D1 (en) 2007-11-15
JP2010050985A (en) 2010-03-04
KR100740738B1 (en) 2007-07-19
US6721349B1 (en) 2004-04-13
EP1147618B1 (en) 2007-10-03
EP1858171B1 (en) 2010-09-29
AU2976500A (en) 2000-08-18
EP1858171A1 (en) 2007-11-21
CN1196273C (en) 2005-04-06
ATE483279T1 (en) 2010-10-15

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