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1. (WO2012031098) ITERATIVE NONLINEAR PRECODING AND FEEDBACK FOR MULTI-USER MULTIPLE -INPUT MULTIPLE-OUTPUT (MU-MIMO) WITH CHANNEL STATE INFORMATION(CSI) IMPAIRMENTS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2012/031098 International Application No.: PCT/US2011/050176
Publication Date: 08.03.2012 International Filing Date: 01.09.2011
Chapter 2 Demand Filed: 02.07.2012
IPC:
H04L 25/03 (2006.01) ,H04L 1/00 (2006.01) ,H04B 1/06 (2006.01)
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
1
Arrangements for detecting or preventing errors in the information received
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
1
Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
06
Receivers
Applicants:
INTERDIGITAL PATENT HOLDINGS, INC. [US/US]; 3411 Silverside Road Concord Plaza, Suite 105 Hagley Building Wilmington, DE 19810, US (AllExceptUS)
SHENG, Hongsan [CN/US]; US (UsOnly)
LI, Yingxue, K. [CN/US]; US (UsOnly)
Inventors:
SHENG, Hongsan; US
LI, Yingxue, K.; US
Agent:
ROCCIA, Vincent, J.; Condo Roccia LLP One Liberty Place 1650 Market Street, Suite 2200 Philadelphia, PA 19103, US
Priority Data:
61/379,00901.09.2010US
Title (EN) ITERATIVE NONLINEAR PRECODING AND FEEDBACK FOR MULTI-USER MULTIPLE -INPUT MULTIPLE-OUTPUT (MU-MIMO) WITH CHANNEL STATE INFORMATION(CSI) IMPAIRMENTS
(FR) PRÉCODAGE NON UNIFORME ITÉRATIF ET RETOUR POUR L'ENTRÉE MULTIPLE SORTIE MULTIPLE MULTIUTILISATEUR (MU-MIMO) LORSQU'IL EXISTE DES ALTÉRATIONS DES INFORMATIONS D'ÉTAT DE CANAL (CSI)
Abstract:
(EN) An iterative nonlinear preceding method based on, for example. Tornlinson- Harashima Preceding (THP) may be implemented in a MU-MIMO system to alleviate the performance degradation due to mismatches between actual Channel State Information (CSI) and impaired CSI available at a transmitter. In such a method, the effective channel may be fed back rather than a nonprecoded channel for a relay backhaul channel such that the iterative preecoding and effective channel feedback may reduce the sensitivity to quantization errors and improve spectrum usage efficiency. Additionally, a Channel Quality Indicator (CQI) may be used to estimate a signal-to-interference-plus-noise (SINK) ratio based on quantization errors to accurately derive the effective channel quality of the receiver.
(FR) Un procédé de précodage non uniforme itératif basé par exemple sur un précodage Tomlinson-Harashima (THP) peut être mis en œuvre dans un système MU-MIMO pour réduire la dégradation des performances due aux disparités entre les informations d'état de canal (CSI) réelles et les CSI altérées disponibles à l'emplacement d'un émetteur. Au cours de ce procédé, le canal effectif peut être retourné à la place d'un canal non précodé pour un canal de liaison terrestre relais, de sorte que le précodage itératif et le retour du canal effectif puissent réduire la sensibilité aux erreurs de quantification et améliorer l'efficacité de l'utilisation du spectre. De plus, un indicateur de qualité de canal (CQI) peut servir à estimer un rapport signal utile/signal brouilleur plus bruit (SINK) sur la base des erreurs de quantification afin de déduire avec précision la qualité de canal effectif du récepteur.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 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:
US20130223555