[go: up one dir, main page]

NO20012104L - Method and switching for signal equalization, especially in offset modulation - Google Patents

Method and switching for signal equalization, especially in offset modulation

Info

Publication number
NO20012104L
NO20012104L NO20012104A NO20012104A NO20012104L NO 20012104 L NO20012104 L NO 20012104L NO 20012104 A NO20012104 A NO 20012104A NO 20012104 A NO20012104 A NO 20012104A NO 20012104 L NO20012104 L NO 20012104L
Authority
NO
Norway
Prior art keywords
equalization
equalization circuit
real
receiver
switching
Prior art date
Application number
NO20012104A
Other languages
Norwegian (no)
Other versions
NO20012104D0 (en
Inventor
James Aldis
Original Assignee
Ascom Powerline Comm Ag
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 Ascom Powerline Comm Ag filed Critical Ascom Powerline Comm Ag
Publication of NO20012104D0 publication Critical patent/NO20012104D0/en
Publication of NO20012104L publication Critical patent/NO20012104L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers
    • 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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03146—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a recursive structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

Utjevning av mottakersignaler i en digital- mottaker, med hjelp av en utjevningskrets (18) (DFE: Decision Feedback Equalizer). Mottakersignalet er endimensjonalt eller kan transformeres til en slik kon- stellasjon (for eksempel innenfor modulasjonstypene BPSK, GMSK, OQPSK). Utjevningskretsens overfør- ingsfunksjon har koeffisienter som blir bestemt slik at en estimeringsverdi for en kompleks feilfunksjons kvadrerte realdel blir søkt brakt til et minimum, og det er altså ikke den egentlige og komplette feilfunksjon som tjener som optimeringsbasis. Beregningen for å gi optimal utjevning kan følgelig reduseres til en real- verdiberegning, filterkoeffisientene for utjevnings- kretsens overføringsfunksjon kan også holdes reelle, og en egnet slik utjevningskrets finnes lettere.Equalization of receiver signals in a digital receiver, using an equalization circuit (18) (DFE: Decision Feedback Equalizer). The receiver signal is one-dimensional or can be transformed into such a constellation (for example, within the modulation types BPSK, GMSK, OQPSK). The transfer function of the equalization circuit has coefficients which are determined so that an estimation value for a squared component's squared real part is sought to be minimized, and thus it is not the actual and complete error function that serves as an optimization basis. Accordingly, the calculation to give optimum equalization can be reduced to a real value calculation, the filter coefficients for the transfer function of the equalization circuit can also be kept real, and a suitable such equalization circuit is more easily found.

NO20012104A 1998-10-30 2001-04-27 Method and switching for signal equalization, especially in offset modulation NO20012104L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98811090A EP0998083A1 (en) 1998-10-30 1998-10-30 Equalisation method, particularly for offset modulation types
PCT/CH1999/000509 WO2000027083A1 (en) 1998-10-30 1999-10-29 Equalization method especially for offset modulation modes

Publications (2)

Publication Number Publication Date
NO20012104D0 NO20012104D0 (en) 2001-04-27
NO20012104L true NO20012104L (en) 2001-04-27

Family

ID=8236418

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20012104A NO20012104L (en) 1998-10-30 2001-04-27 Method and switching for signal equalization, especially in offset modulation

Country Status (12)

Country Link
EP (2) EP0998083A1 (en)
JP (1) JP2002529964A (en)
KR (1) KR20010089314A (en)
CN (1) CN1144430C (en)
AU (1) AU6322599A (en)
BR (1) BR9914950A (en)
CA (1) CA2347747A1 (en)
HK (1) HK1040025A1 (en)
ID (1) ID29202A (en)
IL (1) IL142795A0 (en)
NO (1) NO20012104L (en)
WO (1) WO2000027083A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009079815A1 (en) * 2007-12-10 2009-07-02 Zte Corporation A method for optimizing the radio frequency performance of the terminal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614627B2 (en) * 1985-06-04 1994-02-23 富士通株式会社 Modem training methods
WO1998016021A1 (en) * 1996-10-10 1998-04-16 Statistical Signal Processing, Inc. Signal processing apparatus employing the spectral property of the signal

Also Published As

Publication number Publication date
ID29202A (en) 2001-08-09
CA2347747A1 (en) 2000-05-11
EP0998083A1 (en) 2000-05-03
CN1144430C (en) 2004-03-31
AU6322599A (en) 2000-05-22
NO20012104D0 (en) 2001-04-27
IL142795A0 (en) 2002-03-10
CN1325580A (en) 2001-12-05
EP1125404A1 (en) 2001-08-22
JP2002529964A (en) 2002-09-10
BR9914950A (en) 2001-11-06
KR20010089314A (en) 2001-09-29
WO2000027083A1 (en) 2000-05-11
HK1040025A1 (en) 2002-05-17

Similar Documents

Publication Publication Date Title
CA2076084C (en) Adaptive mlse-va receiver for digital cellular radio
EP0624287B1 (en) Modem including an equalizer for amplitude jitter
CA2493106C (en) Method and apparatus for hybrid decision feedback equalization
CA2233522C (en) Blind training of a decision feedback equalizer
US6771720B1 (en) Amplification control scheme for a receiver
JP3190369B2 (en) Method and receiver for receiving discrete signals
KR101131643B1 (en) Continuous time-decision feedback equalizer
US7035329B2 (en) Soft slicer in a hybrid decision feedback equalizer
US6987803B2 (en) Data communication system with adaptive precoding
IE802153L (en) Phase noise correction circuit
JPH0575498A (en) Discrimination feedback type automatic equalizer
JPH04234251A (en) Apparatus and method estimating phase jitter, receiver, communication system and method used in receiver or communication system
JP2718937B2 (en) Decision command control device and its adjustment method
US6047024A (en) Device for equalizing channel-distorted signals
US6996230B1 (en) Echo-canceler for precoded fractionally spaced receiver using signal estimator
NO20012104L (en) Method and switching for signal equalization, especially in offset modulation
US20050163208A1 (en) Equalized signal path with predictive subtraction signal and method therefor
JPH0216066B2 (en)
JP4315549B2 (en) Signal carrier recovery processing method
WO2002087179A3 (en) Blind equalization using reliable symbols
JPH04264823A (en) Decision feedback type automatic equalizer
US6804293B1 (en) Method for equalising a receive signal
EP1337083A1 (en) DC offset and channel impulse response estimation
US6442198B1 (en) Method and apparatus for stabilizing a decision feedback equalizer
KR0136546B1 (en) Method of renovating a tap coefficient of a magnetic equalizer

Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application