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1. (WO2004038952) CHANNEL ESTIMATION AND SPATIAL PROCESSING FOR TDD MIMO SYSTEMS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2004/038952 International Application No.: PCT/US2003/034567
Publication Date: 06.05.2004 International Filing Date: 24.10.2003
Chapter 2 Demand Filed: 25.05.2004
IPC:
H04B 7/04 (2006.01) ,H04B 7/06 (2006.01) ,H04B 7/08 (2006.01) ,H04L 1/00 (2006.01) ,H04L 1/06 (2006.01) ,H04L 1/08 (2006.01) ,H04L 12/28 (2006.01) ,H04L 12/56 (2006.01) ,H04L 25/02 (2006.01) ,H04L 25/03 (2006.01) ,H04L 27/26 (2006.01) ,H04B 7/005 (2006.01) ,H04L 1/16 (2006.01) ,H04W 16/28 (2009.01) ,H04W 52/50 (2009.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
04
using a plurality of spaced independent aerials
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
04
using a plurality of spaced independent aerials
06
at transmitting station
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
04
using a plurality of spaced independent aerials
08
at receiving station
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
02
by diversity reception
06
using space diversity
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
08
by repeating transmission, e.g. Verdan system
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12
Data switching networks
28
characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12
Data switching networks
54
Store-and-forward switching systems
56
Packet switching systems
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
02
Details
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
02
Details
03
Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
26
Systems using multi-frequency codes
[IPC code unknown for H04B 7/05]
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
12
by using return channel
16
in which the return channel carries supervisory signals, e.g. repetition request signals
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
16
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cell structures
24
Cell structures
28
using beam steering
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
52
Power management, e.g. TPC [Transmission Power Control], power saving or power classes
04
TPC [Transmission power control]
38
TPC being performed in particular situations
50
at the moment of starting communication in a multiple access environment
Applicants:
QUALCOMM, INCORPORATED [US/US]; 5775 Morehouse Drive San Diego, CA 92121, US
Inventors:
KETCHUM, John, W.; US
WALLACE, Mark; US
WALTON, J., Rodney; US
HOWARD, Steven, J.; US
Agent:
WADSWORTH, Philip, R. ; 5775 Morehouse Drive San Diego, CA 92121, US
Priority Data:
10/693,17123.10.2003US
60/421,30925.10.2002US
60/421,42825.10.2002US
60/421,46225.10.2002US
Title (EN) CHANNEL ESTIMATION AND SPATIAL PROCESSING FOR TDD MIMO SYSTEMS
(FR) ESTIMATION DE CANAL ET TRAITEMENT SPATIAL POUR SYSTEMES TDD MIMO
Abstract:
(EN) Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/ receive chains at the access point and user terminal (512). During normal operation, a MIMO pilot is transmitted on a first link (522) and used to derive an estimate of the first link channel response (524), which is decomposed to obtain a diagonal matrix of singular values and a first unitary matrix containing both left eigenvectors of the first link and right eigenvectors of a second link (526). A steered reference is transmitted on the second link using the eigenvectors in the first unitary matrix (530), and is processed to obtain the diagonal matrix and a second unitary matrix containing both left eigenvectors of the second link and right eigenvectors of the first link (532). Each unitary matrix may be used to perform spatial processing for data transmission/reception via both links (540, 542, 550, 552).
(FR) La présente invention concerne une estimation de canal et un traitement spatial pour système TDD MIMO. L'invention permet d'effectuer un étalonnage afin de compenser les différences dans les réponses des chaînes de transmission et de réception au point d'accès et au terminal utilisateur. Au cours d'un fonctionnement normal, un pilote MIMO est transmis sur une première liaison et utilisé pour dériver une estimation de la réponse de canal de la première liaison, que l'on décompose afin d'obtenir une matrice diagonale de valeurs singulières et une première matrice unitaire contenant les vecteurs propres gauches de la première liaison et les vecteurs propres droits d'une seconde liaison. On transmet une référence commandée sur la seconde liaison à l'aide des vecteurs propres de la première matrice unitaire, que l'on traite afin d'obtenir la matrice diagonale et une seconde matrice unitaire contenant à la fois les vecteurs propres gauches de la seconde liaison et les vecteurs propres droits de la première liaison. On peut utiliser chaque matrice unitaire pour effectuer un traitement spatial de la transmission et de la réception des données via les deux liaisons.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
MXPA/a/2005/004318KR1020050060105IL167979EP1559209JP2006504341RU02351071
CN1729634CA2502804ES2407839AU2003287328ID044.274ID049.3811
IN719/CHENP/2005