GB2350762A - Radio telephone for spread-spectrum system using nonlinear modulation - Google Patents

Radio telephone for spread-spectrum system using nonlinear modulation

Info

Publication number
GB2350762A
GB2350762A GB0018658A GB0018658A GB2350762A GB 2350762 A GB2350762 A GB 2350762A GB 0018658 A GB0018658 A GB 0018658A GB 0018658 A GB0018658 A GB 0018658A GB 2350762 A GB2350762 A GB 2350762A
Authority
GB
United Kingdom
Prior art keywords
spread
radio telephone
spectrum system
nonlinear modulation
code
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.)
Withdrawn
Application number
GB0018658A
Other versions
GB0018658D0 (en
Inventor
Natividade Albert Lobo
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.)
Nokia Oyj
Original Assignee
Nokia Mobile Phones Ltd
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 GBGB9801308.9A external-priority patent/GB9801308D0/en
Priority claimed from GBGB9801305.5A external-priority patent/GB9801305D0/en
Priority claimed from GBGB9801302.2A external-priority patent/GB9801302D0/en
Priority claimed from GBGB9801306.3A external-priority patent/GB9801306D0/en
Priority claimed from GBGB9804600.6A external-priority patent/GB9804600D0/en
Priority claimed from GBGB9805126.1A external-priority patent/GB9805126D0/en
Priority claimed from GBGB9805234.3A external-priority patent/GB9805234D0/en
Priority claimed from GB9805504A external-priority patent/GB2337670B/en
Priority claimed from GB9814300A external-priority patent/GB2333673A/en
Application filed by Nokia Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Publication of GB0018658D0 publication Critical patent/GB0018658D0/en
Publication of GB2350762A publication Critical patent/GB2350762A/en
Withdrawn legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)

Abstract

A method is provided for despreading a signal which has been spread by a code and modulated according to a non-linear modulation scheme. The method comprises transforming the code into a succession of phasor positions (405) and correlating the spread signal with the transformed code (406). A despreader, demodulator and communications device implementing such a method are also provided.
GB0018658A 1998-01-21 1999-01-21 Radio telephone for spread-spectrum system using nonlinear modulation Withdrawn GB2350762A (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
GBGB9801305.5A GB9801305D0 (en) 1998-01-21 1998-01-21 Optimizer
GBGB9801302.2A GB9801302D0 (en) 1998-01-21 1998-01-21 Mobile phone system
GBGB9801306.3A GB9801306D0 (en) 1998-01-21 1998-01-21 Receiver/modulator
GBGB9801308.9A GB9801308D0 (en) 1998-01-21 1998-01-21 Receiver/modulator
GBGB9804600.6A GB9804600D0 (en) 1998-03-05 1998-03-05 A cdma modulator/demodulator
GBGB9805126.1A GB9805126D0 (en) 1998-03-11 1998-03-11 A transceiver
GBGB9805234.3A GB9805234D0 (en) 1998-01-21 1998-03-12 A radio telephone
GB9805504A GB2337670B (en) 1998-01-21 1998-03-13 Method and Apparatus for Generating a Pulse Function
GB9814300A GB2333673A (en) 1998-01-21 1998-07-01 Despreading a signal which has been spread by a code and modulated according to a non-linear modulation scheme
PCT/GB1999/000202 WO1999038300A2 (en) 1998-01-21 1999-01-21 Radio telephone for spread-spectrum system using nonlinear modulation

Publications (2)

Publication Number Publication Date
GB0018658D0 GB0018658D0 (en) 2000-09-13
GB2350762A true GB2350762A (en) 2000-12-06

Family

ID=27576376

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9824426A Expired - Fee Related GB2333674B (en) 1998-01-21 1998-11-06 A radio telephone
GB0018658A Withdrawn GB2350762A (en) 1998-01-21 1999-01-21 Radio telephone for spread-spectrum system using nonlinear modulation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9824426A Expired - Fee Related GB2333674B (en) 1998-01-21 1998-11-06 A radio telephone

Country Status (6)

Country Link
EP (1) EP1050142A2 (en)
JP (1) JP2002502150A (en)
CN (1) CN1294807A (en)
AU (1) AU2176599A (en)
GB (2) GB2333674B (en)
WO (1) WO1999038300A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333673A (en) * 1998-01-21 1999-07-28 Nokia Mobile Phones Ltd Despreading a signal which has been spread by a code and modulated according to a non-linear modulation scheme
GB2351633A (en) * 1999-07-01 2001-01-03 Nokia Mobile Phones Ltd Optimising pulse shaping for radio telephones
EP1240531A1 (en) * 1999-12-10 2002-09-18 Nokia Corporation A receiver for a satellite based position location system
US6642885B2 (en) 1999-12-10 2003-11-04 Nokia Corporation Receiver for a satellite based position location system
US7684497B2 (en) * 2005-06-30 2010-03-23 Nokia Corporation Method and apparatus for generating M-ary CPM waveforms from a superposition of PAM waveforms
DE102009033788A1 (en) * 2009-07-17 2011-03-03 Astrium Gmbh Method for receiving a signal and receiver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592009A (en) * 1983-11-17 1986-05-27 E-Systems, Inc. MSK surface acoustic wave convolver
EP0782358A2 (en) * 1995-12-29 1997-07-02 Lucent Technologies Inc. Mobile communicator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653282B1 (en) * 1989-10-18 1994-07-22 Alcatel Transmission METHOD FOR THE NUMERICAL CORRECTION OF NON-LINEARITY OF A TRANSMISSION CHAIN, AND DEVICE FOR CARRYING OUT SAID METHOD.
KR950007440B1 (en) * 1991-05-28 1995-07-10 삼성전자주식회사 Narrow band superposition modulated signal generation device
US5790516A (en) * 1995-07-14 1998-08-04 Telefonaktiebolaget Lm Ericsson Pulse shaping for data transmission in an orthogonal frequency division multiplexed system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592009A (en) * 1983-11-17 1986-05-27 E-Systems, Inc. MSK surface acoustic wave convolver
EP0782358A2 (en) * 1995-12-29 1997-07-02 Lucent Technologies Inc. Mobile communicator

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"IEEE International Conference on Communications",1982,IEEE,pp 6F.5.01-6F.5.06 *
IEEE Communications Magazine, Vol. 33, No. 5, May 1995,pages56-61 *
IEEE ISSSTA '94, Vol. 2, July 1994, pages 554-559 *
IEEE Transactions on Communications, Vol. 36, No. 1, January1988, pages 32-40 *
IEEE Transactions on Communications, Vol. COM-34, No. 2, February 1986, pages 150-160 *

Also Published As

Publication number Publication date
GB9824426D0 (en) 1999-01-06
GB2333674B (en) 2003-08-27
GB2333674A8 (en) 1999-10-07
GB2333674A (en) 1999-07-28
AU2176599A (en) 1999-08-09
CN1294807A (en) 2001-05-09
WO1999038300A2 (en) 1999-07-29
GB0018658D0 (en) 2000-09-13
WO1999038300A3 (en) 1999-10-28
EP1050142A2 (en) 2000-11-08
JP2002502150A (en) 2002-01-22

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GB2350762A (en) Radio telephone for spread-spectrum system using nonlinear modulation

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)