CA2406757A1 - System and method for peak power reduction in spread spectrum communications systems - Google Patents

System and method for peak power reduction in spread spectrum communications systems Download PDF

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Publication number
CA2406757A1
CA2406757A1 CA002406757A CA2406757A CA2406757A1 CA 2406757 A1 CA2406757 A1 CA 2406757A1 CA 002406757 A CA002406757 A CA 002406757A CA 2406757 A CA2406757 A CA 2406757A CA 2406757 A1 CA2406757 A1 CA 2406757A1
Authority
CA
Canada
Prior art keywords
filter
peak reduction
spread spectrum
input symbols
signal
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.)
Granted
Application number
CA002406757A
Other languages
French (fr)
Other versions
CA2406757C (en
Inventor
Matthew J. Hunton
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.)
Intel Corp
Original Assignee
Individual
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
Priority claimed from US09/746,167 external-priority patent/US6449302B2/en
Application filed by Individual filed Critical Individual
Publication of CA2406757A1 publication Critical patent/CA2406757A1/en
Application granted granted Critical
Publication of CA2406757C publication Critical patent/CA2406757C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2621—Reduction thereof using phase offsets between subcarriers

Abstract

A system and method for signal peak reduction in a spread spectrum communication system of the type including a filter for limiting signal bandwidth of symbols transmitted from the system. A signal peak reduction un it (122) is provided before the filter (126) the includes a filter predictor (146) that predicts the effect of that filter on input symbols by using filt er coefficient values corresponding to the filter impulse response function. Input symbols that are predicted to cause the output signal to exceed a predetermined peak limit value are adjusted. Several examples of suitable algorithms for calculating the necessary peak reduction to be applied to the input symbols are disclosed. The peak reduction unit provides adjusted symbo ls to the filter for processing and communication system output.
CA002406757A 2000-04-19 2001-02-28 System and method for peak power reduction in spread spectrum communications systems Expired - Fee Related CA2406757C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US19851600P 2000-04-19 2000-04-19
US60/198,516 2000-04-19
US21289200P 2000-06-20 2000-06-20
US60/212,892 2000-06-20
US09/746,167 US6449302B2 (en) 2000-04-19 2000-12-22 System and method for peak power reduction in spread spectrum communications systems
US09/746,167 2000-12-22
PCT/US2001/006317 WO2001082547A1 (en) 2000-04-19 2001-02-28 System and method for peak power reduction in spread spectrum communications systems

Publications (2)

Publication Number Publication Date
CA2406757A1 true CA2406757A1 (en) 2001-11-01
CA2406757C CA2406757C (en) 2004-03-23

Family

ID=27393889

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002406757A Expired - Fee Related CA2406757C (en) 2000-04-19 2001-02-28 System and method for peak power reduction in spread spectrum communications systems

Country Status (5)

Country Link
EP (1) EP1281262A4 (en)
KR (1) KR100466057B1 (en)
CN (1) CN1284345C (en)
AU (1) AU2001241825A1 (en)
CA (1) CA2406757C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4287225B2 (en) * 2003-09-18 2009-07-01 株式会社日立国際電気 Transmitter
JP4871813B2 (en) * 2007-08-28 2012-02-08 株式会社日立製作所 Wireless communication device, wireless communication method, and peak suppression method
GB2483290B (en) * 2010-09-03 2015-07-22 Nvidia Technology Uk Ltd Transmitting a signal from a power amplifier
EP2940866B1 (en) 2014-04-30 2021-12-08 Nxp B.V. Rf switch circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418813A (en) * 1993-12-06 1995-05-23 Motorola, Inc. Method and apparatus for creating a composite waveform
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
JP3311950B2 (en) * 1996-12-19 2002-08-05 富士通株式会社 Code multiplex radio equipment
JP3462388B2 (en) * 1998-04-28 2003-11-05 松下電器産業株式会社 Wireless communication device

Also Published As

Publication number Publication date
CA2406757C (en) 2004-03-23
CN1284345C (en) 2006-11-08
KR100466057B1 (en) 2005-01-13
KR20020089512A (en) 2002-11-29
CN1425242A (en) 2003-06-18
EP1281262A4 (en) 2008-09-10
AU2001241825A1 (en) 2001-11-07
EP1281262A1 (en) 2003-02-05

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Legal Events

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EEER Examination request
MKLA Lapsed

Effective date: 20190228

MKLA Lapsed

Effective date: 20190228