WO2000033501A3 - Adaptive modem and method for adaptive election of modulation mode - Google Patents

Adaptive modem and method for adaptive election of modulation mode Download PDF

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Publication number
WO2000033501A3
WO2000033501A3 PCT/FI1999/000952 FI9900952W WO0033501A3 WO 2000033501 A3 WO2000033501 A3 WO 2000033501A3 FI 9900952 W FI9900952 W FI 9900952W WO 0033501 A3 WO0033501 A3 WO 0033501A3
Authority
WO
WIPO (PCT)
Prior art keywords
adaptive
modem
election
transmitter
signal processing
Prior art date
Application number
PCT/FI1999/000952
Other languages
French (fr)
Other versions
WO2000033501A2 (en
Inventor
Pauli Lallo
Pekka Peltoniemi
Mauri Sekki
Ilpo Tervapuro
Original Assignee
Pauli Lallo
Pekka Peltoniemi
Mauri Sekki
Ilpo Tervapuro
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 Pauli Lallo, Pekka Peltoniemi, Mauri Sekki, Ilpo Tervapuro filed Critical Pauli Lallo
Priority to AU13893/00A priority Critical patent/AU1389300A/en
Publication of WO2000033501A2 publication Critical patent/WO2000033501A2/en
Publication of WO2000033501A3 publication Critical patent/WO2000033501A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes

Abstract

Adaptive modem including modem part which comprises a transmitter and a receiver using digital signal processing and a control unit needed for the control of the modem functions, interface for the telecommunication network, where we have interfaces for the telecommunication network, and the signal amplification and waveform shaping units needed in transmission and receiving process, and the computer bus interface. Digital signal processing includes the calculation algorithms of an application of Fourrier Transform, where the transmitter and receiver functions are made with the algorithms mentioned optimally adaptive to the transmission speed, bit error and/or bandwidth of the available communication channel.
PCT/FI1999/000952 1998-11-17 1999-11-17 Adaptive modem and method for adaptive election of modulation mode WO2000033501A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13893/00A AU1389300A (en) 1998-11-17 1999-11-17 Adaptive modem and method for adaptive election of modulation mode

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI982479 1998-11-17
FI982479A FI982479A (en) 1998-11-17 1998-11-17 An adaptive modem and a method for adaptively selecting a modulation method

Publications (2)

Publication Number Publication Date
WO2000033501A2 WO2000033501A2 (en) 2000-06-08
WO2000033501A3 true WO2000033501A3 (en) 2000-08-10

Family

ID=8552924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000952 WO2000033501A2 (en) 1998-11-17 1999-11-17 Adaptive modem and method for adaptive election of modulation mode

Country Status (3)

Country Link
AU (1) AU1389300A (en)
FI (1) FI982479A (en)
WO (1) WO2000033501A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063574A (en) * 1990-03-06 1991-11-05 Moose Paul H Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels
EP0820168A2 (en) * 1996-07-19 1998-01-21 Texas Instruments Incorporated Multimode modem, and protocols therefor
US5715277A (en) * 1995-07-28 1998-02-03 Motorola, Inc. Apparatus and method for determining a symbol rate and a carrier frequency for data transmission and reception
EP0828363A2 (en) * 1996-09-04 1998-03-11 Texas Instruments Incorporated Multicode modem with a plurality of analogue front ends
US5764699A (en) * 1994-03-31 1998-06-09 Motorola, Inc. Method and apparatus for providing adaptive modulation in a radio communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063574A (en) * 1990-03-06 1991-11-05 Moose Paul H Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels
US5764699A (en) * 1994-03-31 1998-06-09 Motorola, Inc. Method and apparatus for providing adaptive modulation in a radio communication system
US5715277A (en) * 1995-07-28 1998-02-03 Motorola, Inc. Apparatus and method for determining a symbol rate and a carrier frequency for data transmission and reception
EP0820168A2 (en) * 1996-07-19 1998-01-21 Texas Instruments Incorporated Multimode modem, and protocols therefor
EP0828363A2 (en) * 1996-09-04 1998-03-11 Texas Instruments Incorporated Multicode modem with a plurality of analogue front ends

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"OFDM and related methods for broadband mobile radio channels", CZylwik, A: 1998 International Zurich Seminar on Broadband Communications, 1998. Accessing, Transmission, Networking. Proceedings., Pages 91-98, Conference date 17-19 February 1998 *

Also Published As

Publication number Publication date
WO2000033501A2 (en) 2000-06-08
FI982479A0 (en) 1998-11-17
AU1389300A (en) 2000-06-19
FI982479A (en) 2000-05-18

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