IT1273794B - Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati - Google Patents

Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati

Info

Publication number
IT1273794B
IT1273794B ITMI940312A ITMI940312A IT1273794B IT 1273794 B IT1273794 B IT 1273794B IT MI940312 A ITMI940312 A IT MI940312A IT MI940312 A ITMI940312 A IT MI940312A IT 1273794 B IT1273794 B IT 1273794B
Authority
IT
Italy
Prior art keywords
transmission
ofdm
frequency division
data
multiplation
Prior art date
Application number
ITMI940312A
Other languages
English (en)
Inventor
Gianfranco Cariolaro
Augusto Costanzi
Original Assignee
Italtel Spa
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 Italtel Spa filed Critical Italtel Spa
Priority to ITMI940312A priority Critical patent/IT1273794B/it
Publication of ITMI940312A0 publication Critical patent/ITMI940312A0/it
Priority to EP95200367A priority patent/EP0668678A3/en
Publication of ITMI940312A1 publication Critical patent/ITMI940312A1/it
Application granted granted Critical
Publication of IT1273794B publication Critical patent/IT1273794B/it

Links

Classifications

    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • H04L27/2631—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators with polyphase implementation
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/264—Pulse-shaped multi-carrier, i.e. not using rectangular window
    • H04L27/26416—Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]
    • 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
    • H04L27/26534—Pulse-shaped multi-carrier, i.e. not using rectangular window
    • H04L27/2654—Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]

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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Transmitters (AREA)

Abstract

Sistema con multiplazione ortogonale a divisione di frequenza (OFDM) per la trasmissione di sequenze o canali di dati che consente di trasmettere e ricevere un numero doppio di canali senza sostanziale aumento della complessità di elaborazione.Il sistema di trasmissione prevede 2N sequenze di dati Co - C2n - 1 e altrettanti blocchi (DS) di staggering dei dati le cui uscite vengono riunite a coppie e premodulate alternativamente con una frequenza f0 ed una frequenza f1, e quindi sommate in N nodi sommatori (?:), dimezzando così il numero dei segnali.Un processore N - IDFT esegue la trasformata discreta di Fourier per N punti e le uscite del processore IDFT sono collegate ad N estrattori (HSE) delle parti con simmetrie H0 e H1, che sfruttano le simmetrie Hermitiane ed Antiermitiane.Il ricevitore ha una struttura duale.
ITMI940312A 1994-02-22 1994-02-22 Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati IT1273794B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITMI940312A IT1273794B (it) 1994-02-22 1994-02-22 Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati
EP95200367A EP0668678A3 (en) 1994-02-22 1995-02-15 Orthogonal frequency division multiplexing (OFDM) system and method for transmitting data sequences.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI940312A IT1273794B (it) 1994-02-22 1994-02-22 Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati

Publications (3)

Publication Number Publication Date
ITMI940312A0 ITMI940312A0 (it) 1994-02-22
ITMI940312A1 ITMI940312A1 (it) 1995-08-23
IT1273794B true IT1273794B (it) 1997-07-10

Family

ID=11367931

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI940312A IT1273794B (it) 1994-02-22 1994-02-22 Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati

Country Status (2)

Country Link
EP (1) EP0668678A3 (it)
IT (1) IT1273794B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1261364B (it) * 1993-12-01 1996-05-20 Sisvel Spa Sistema di ricetrasmissione di dati a multiplazione ortogonale con modulatore unico per l'allocazione in frequenza dei sottocanali
IT1271322B (it) * 1994-12-23 1997-05-27 Italtel Spa Sistema e metodo di demodulazione per ricevitori ofdm
GB2304504A (en) * 1995-08-19 1997-03-19 Northern Telecom Ltd OFDM receiver includes digital filter
SE514736C2 (sv) * 1997-06-30 2001-04-09 Ericsson Telefon Ab L M Digitalt system för abonnentledningar med höga bithastigheter
ATE362683T1 (de) * 2004-01-06 2007-06-15 Ibm Modulation und demodulation von ofdm-signalen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300229A (en) * 1979-02-21 1981-11-10 Nippon Electric Co., Ltd. Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor

Also Published As

Publication number Publication date
EP0668678A3 (en) 1997-07-30
ITMI940312A0 (it) 1994-02-22
EP0668678A2 (en) 1995-08-23
ITMI940312A1 (it) 1995-08-23

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