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1. WO2005088863 - TRANSMIT DIVERSITY AND SPATIAL SPREADING FOR AN OFDM-BASED MULTI-ANTENNA COMMUNICATION SYSTEM

Publication Number WO/2005/088863
Publication Date 22.09.2005
International Application No. PCT/US2005/007020
International Filing Date 03.03.2005
Chapter 2 Demand Filed 05.10.2005
IPC
H04B 7/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
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
CPC
H04B 7/0413
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
0413MIMO systems
H04B 7/0615
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
0613using simultaneous transmission
0615of weighted versions of same signal
H04L 27/2602
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2602Signal structure
H04L 27/2626
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2626Arrangements specific to the transmitter
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
H04W 12/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
12Security arrangements, e.g. access security or fraud detection; Authentication, e.g. verifying user identity or authorisation; Protecting privacy or anonymity ; ; Protecting confidentiality; Key management; Integrity; Mobile application security; Using identity modules; Secure pairing of devices; Context aware security; Lawful interception
02Protecting privacy or anonymity ; , e.g. protecting personally identifiable information [PII]
Applicants
  • QUALCOMM INCORPORATED [US]/[US] (AllExceptUS)
  • WALTON, Jay Rodney [US]/[US] (UsOnly)
  • KETCHUM, John W. [US]/[US] (UsOnly)
  • WALLACE, Mark S. [US]/[US] (UsOnly)
  • HOWARD, Steven J. [US]/[US] (UsOnly)
  • NANDA, Sanjiv [US]/[US] (UsOnly)
Inventors
  • WALTON, Jay Rodney
  • KETCHUM, John W.
  • WALLACE, Mark S.
  • HOWARD, Steven J.
  • NANDA, Sanjiv
Agents
  • OGROD, Gregory D.
Priority Data
10/794,91805.03.2004US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TRANSMIT DIVERSITY AND SPATIAL SPREADING FOR AN OFDM-BASED MULTI-ANTENNA COMMUNICATION SYSTEM
(FR) EMISSIONS EN DIVERSITE ET EN ETALEMENT SPATIAL DANS UN SYSTEME DE COMMUNICATION MROF A PLUSIEURS ANTENNES
Abstract
(EN)
A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective channels observed by the data transmission across the subbands. The PRTS mode may be used to achieve transmit diversity or spatial spreading. For transmit diversity, the transmitting entity uses different pseudo-random steering vectors across the subbands but the same steering vector across a packet for each subband. The receiving entity does not need to have knowledge of the pseudo-random steering vectors or perform any special processing. For spatial spreading, the transmitting entity uses different pseudo-random steering vectors across the subbands and different steering vectors across the packet for each subband. Only the transmitting and receiving entities know the steering vectors used for data transmission.
(FR)
Une entité émettrice à plusieurs antennes émet des données à destination d'une entité réceptrice à une ou plusieurs antennes, soit en mode directionnel (1) de manière à diriger les données vers l'entité réceptrice, soit en mode PRTS (2) (directionnel pseudo-aléatoire), pour aléatoiriser les différents canaux efficaces de la sous-bande. Le mode PRTS peut servir à émettre en diversité ou en étalement spatial. Pour les émissions en diversité, l'entité émettrice utilise différents vecteurs directionnels pseudo-aléatoires de la sous-bande, mais un même vecteur directionnel pour un paquet de chaque sous-bande. L'entité réceptrice ne doit pas avoir connaissance des vecteurs directionnels pseudo-aléatoires ni ne doit exécuter de procédure spéciale. Pour les émissions en étalement spatial, l'entité émettrice utilise les différents vecteurs directionnels de la sous-bande et les différents vecteurs directionnels des paquets de chaque sous-bande. Seules les entités émettrice et réceptrice ont connaissance des vecteurs directionnels utilisés pour la transmission des données.
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