SE9603196L - Förbättringar av, eller med avseende på, multibärvågssystem - Google Patents

Förbättringar av, eller med avseende på, multibärvågssystem

Info

Publication number
SE9603196L
SE9603196L SE9603196A SE9603196A SE9603196L SE 9603196 L SE9603196 L SE 9603196L SE 9603196 A SE9603196 A SE 9603196A SE 9603196 A SE9603196 A SE 9603196A SE 9603196 L SE9603196 L SE 9603196L
Authority
SE
Sweden
Prior art keywords
parameter
carrier wave
detection unit
symbol detection
constellation
Prior art date
Application number
SE9603196A
Other languages
English (en)
Other versions
SE9603196D0 (sv
SE506643C2 (sv
Inventor
Mikael Isaksson
Magnus Johansson
Harry Erland Tonvall
Lennart Olsson
Tomas Stefansson
Hans Oehman
Kjell Gunnar Bahlenberg
Anders Imanuel Isaksson
Sven Goeran Oekvist
Karin Lis-Mari Ljunggren
Tomas Nordstroem
Lars-Aake Isaksson
Daniel Bengtsson
Wen Ye
Siwert Haakansson
Original Assignee
Telia Ab
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 to SE9602074A priority Critical patent/SE9602074D0/sv
Application filed by Telia Ab filed Critical Telia Ab
Priority to SE9603196A priority patent/SE506643C2/sv
Publication of SE9603196D0 publication Critical patent/SE9603196D0/sv
Priority to JP51256198A priority patent/JP4016126B2/ja
Priority to US09/147,742 priority patent/US6438174B1/en
Priority to AT97939279T priority patent/ATE228286T1/de
Priority to DE69717285T priority patent/DE69717285T2/de
Priority to EP97939279A priority patent/EP0922345B1/en
Priority to PCT/SE1997/001459 priority patent/WO1998010554A2/en
Publication of SE9603196L publication Critical patent/SE9603196L/sv
Publication of SE506643C2 publication Critical patent/SE506643C2/sv
Priority to NO990776A priority patent/NO990776L/no

Links

Classifications

    • 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
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • H04L27/26526—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26532—Demodulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms
    • 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
    • H04L27/2697—Multicarrier modulation systems in combination with other modulation techniques
    • H04L27/2698—Multicarrier modulation systems in combination with other modulation techniques double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
SE9603196A 1996-05-24 1996-09-02 Förbättringar av, eller med avseende på, multibärvågssystem SE506643C2 (sv)

Priority Applications (9)

Application Number Priority Date Filing Date Title
SE9602074A SE9602074D0 (sv) 1996-05-24 1996-05-24 Method for determining the bit-loading in a multicarrier system
SE9603196A SE506643C2 (sv) 1996-05-24 1996-09-02 Förbättringar av, eller med avseende på, multibärvågssystem
PCT/SE1997/001459 WO1998010554A2 (en) 1996-09-02 1997-09-01 Improvements in, or relating to, multi-carrier transmission systems
AT97939279T ATE228286T1 (de) 1996-09-02 1997-09-01 Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
US09/147,742 US6438174B1 (en) 1996-09-02 1997-09-01 Multi-carrier transmission systems
JP51256198A JP4016126B2 (ja) 1996-09-02 1997-09-01 多重搬送波伝送システムの改良
DE69717285T DE69717285T2 (de) 1996-09-02 1997-09-01 Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
EP97939279A EP0922345B1 (en) 1996-09-02 1997-09-01 Improvements in, or relating to, multi-carrier transmission systems
NO990776A NO990776L (no) 1996-09-02 1999-02-19 Multibµrer transmisjonssystem som anvender ortogonale bµrere, og en fremgangsmÕte for Õ bestemme en konstellasjon for hver bµrer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602074A SE9602074D0 (sv) 1996-05-24 1996-05-24 Method for determining the bit-loading in a multicarrier system
SE9603196A SE506643C2 (sv) 1996-05-24 1996-09-02 Förbättringar av, eller med avseende på, multibärvågssystem

Publications (3)

Publication Number Publication Date
SE9603196D0 SE9603196D0 (sv) 1996-09-02
SE9603196L true SE9603196L (sv) 1997-11-30
SE506643C2 SE506643C2 (sv) 1998-01-26

Family

ID=26662640

Family Applications (2)

Application Number Title Priority Date Filing Date
SE9602074A SE9602074D0 (sv) 1996-05-24 1996-05-24 Method for determining the bit-loading in a multicarrier system
SE9603196A SE506643C2 (sv) 1996-05-24 1996-09-02 Förbättringar av, eller med avseende på, multibärvågssystem

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SE9602074A SE9602074D0 (sv) 1996-05-24 1996-05-24 Method for determining the bit-loading in a multicarrier system

Country Status (1)

Country Link
SE (2) SE9602074D0 (sv)

Also Published As

Publication number Publication date
SE9602074D0 (sv) 1996-05-24
SE9603196D0 (sv) 1996-09-02
SE506643C2 (sv) 1998-01-26

Similar Documents

Publication Publication Date Title
ATE228286T1 (de) Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
US4577333A (en) Composite shift keying communication system
US4988972A (en) Method for transmitting and receiving signals over transmission power lines
CA2095025A1 (en) Channel equalisation in particular for fading channels
AU5820700A (en) Synchronization and detection of modulation type
WO1998010553A3 (en) Improvements in, or relating to, control channels for telecommunications transmission systems
KR910001164B1 (ko) 디지틀 데이터 해독장치 및 방법
MY132087A (en) Method and apparatus for aligning a digital receiver
SE9603196L (sv) Förbättringar av, eller med avseende på, multibärvågssystem
DE69030910D1 (de) Nachrichtensystem mit gemischten modulationsebenen
DK1060602T3 (da) Fremgangsmåde til at reducere spidsværdien af enkeltbærebölgemodulerede eller multibærebölgemodulerede digitale sendesignaler
EP1026840B1 (en) Polarisation modulation for optical transmission
GB2045034A (en) Carrier transmission lthrough harmonic polluted medium
WO1998001957A3 (en) Transmission system and receiver with improved detection, and improved detection method
ATE249121T1 (de) Differentielle demodulation in zwei dimensionen
JPS6455932A (en) Method of communicating staffing instruction in multlevel communication system
JPH024036A (ja) 光ビーム通信方式
SE9701908L (sv) Mottagningsanordning som kan mottaga en sändningssignal för att bilda en talsignal med stor stabilitet
JPH08204762A (ja) データ通信用復調回路
SU1587655A1 (ru) Коррел ционна система передачи и приема оптических сигналов
KR960009464A (ko) 엔코더 출력 전송 시스템
JPH03245640A (ja) モデムのデータ速度制御方式
JPS57185749A (en) Method and apparatus for self-test of modulation and demodulation device
JPS573449A (en) Error correcting system
SE9603197D0 (sv) Improvements in, or relsting to, multi-carrier transmission systems

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 9603196-8

Format of ref document f/p: F