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1. WO2005062732 - A VARIABLE SPREADING FACTOR-ORTHOGONAL FREQUENCY AND CODE DIVISION MULTIPLEXING (VSF-OFCDM) SYSTEM, A RECEIVER FOR USE THEREIN AND A METHOD OF PROCESSING RECEIVED SIGNALS IN SUCH A SYSTEM

Publication Number WO/2005/062732
Publication Date 14.07.2005
International Application No. PCT/SG2003/000298
International Filing Date 31.12.2003
Chapter 2 Demand Filed 29.07.2005
IPC
H04L 27/26 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
H04L 5/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5Arrangements affording multiple use of the transmission path
02Channels characterised by the type of signal
CPC
H04L 2025/03414
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
03006Arrangements for removing intersymbol interference
0335characterised by the type of transmission
03375Passband transmission
03414Multicarrier
H04L 25/03159
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
03006Arrangements for removing intersymbol interference
03159operating in the frequency domain
H04L 27/2647
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
H04L 5/0017
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5Arrangements affording multiple use of the transmission path
0001Arrangements for dividing the transmission path
0014Three-dimensional division
0016Time-frequency-code
0017in which a distinct code is applied, as a temporal sequence, to each frequency
Applicants
  • AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH [SG]/[SG] (AllExceptUS)
  • CHIN, Po, Shin, Francois [SG]/[SG] (UsOnly)
  • LEI, Zhongding [CN]/[SG] (UsOnly)
  • PENG, Xiaoming [CN]/[SG] (UsOnly)
Inventors
  • CHIN, Po, Shin, Francois
  • LEI, Zhongding
  • PENG, Xiaoming
Agents
  • WATKIN, Timothy, Lawrence, Harvey
  • POH, Chee Kian, Daniel
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A VARIABLE SPREADING FACTOR-ORTHOGONAL FREQUENCY AND CODE DIVISION MULTIPLEXING (VSF-OFCDM) SYSTEM, A RECEIVER FOR USE THEREIN AND A METHOD OF PROCESSING RECEIVED SIGNALS IN SUCH A SYSTEM
(FR) SYSTEME A MULTIPLEXAGE PAR REPARTITION ORTHOGONALE DE LA FREQUENCE ET PAR REPARTITION EN CODE A FACTEUR D'ETALEMENT VARIABLE (VSF-OFCDM), RECEPTEUR UTILISE DANS CE SYSTEME ET PROCEDE DE TRAITEMENT DE SIGNAUX REÇUS DANS CE SYSTEME
Abstract
(EN)
A variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM) system and receiver for use therein has a sequence extension remover for removing a predetermined number of chips from the received signal to form a modified signal, and a first converter (19) for converting the modified signal from a serial sequence to a parallel sequence. A despreader (20) is coupled to the first converter (19) for despreading the parallel sequence to derive a group of symbols. An orthogonal transform block (22), such as a Fast Fourier Transform block is coupled to the despreader (20) to transform the symbols from the time domain to the frequency domain. An equalizer block (24) is coupled to the transform block (22) for equalizing the transformed signal to reduce channel distortion. A deinterleaver block (26) is coupled to the equalizer block (24) to form a deinterleaved signal. The deinterleaved signal is then converted from a parallel sequence to a serial sequence by a second converter (28).
(FR)
L'invention concerne un système à multiplexage par répartition orthogonale de la fréquence et par répartition en code à facteur d'étalement variable (VSF-OFCDM) ainsi qu'un récepteur utilisé dans ce système. Ledit système comprend un suppresseur d'extension de séquence destiné à supprimer un nombre prédéterminé de bribes du signal reçu en vue de la formation d'un signal modifié, ainsi qu'un premier convertisseur servant à convertir le signal modifié d'une séquence sérielle à une séquence parallèle. Un désétaleur est couplé au premier convertisseur et permet de désétaler la séquence parallèle et de dériver un groupe de symboles. Un bloc à transformation orthogonale, tel qu'un bloc à transformation de Fourier rapide, est couplé au désétaleur en vue d'une transformation des symboles du domaine temps au domaine fréquence. Un bloc égaliseur est couplé au bloc à transformation et permet d'égaliser le signal transformé en vue d'une réduction de la distorsion de canal. Un bloc désentrelaceur est couplé au bloc égaliseur et permet de former un signal désentrelacé. Le signal désentrelacé est ensuite converti d'une séquence parallèle à une séquence sérielle.
Also published as
US2007165700
Latest bibliographic data on file with the International Bureau