WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2005120000) FOURIER-TRANSFORM BASED LINEAR EQUALIZATION FOR MIMO CDMA DOWNLINK
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/120000    International Application No.:    PCT/IB2005/001425
Publication Date: 15.12.2005 International Filing Date: 24.05.2005
IPC:
H04L 27/01 (2006.01), H04B 1/707 (2006.01)
Applicants: NOKIA CORPORATION [FI/FI]; Keilalahdentie 4, FIN-02150 Espoo (FI) (AE, AG, AL, AM, AT, AU, AZ, BA, BE, BF, BG, BJ, BR, BW, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SI, SK, SL, SM, SN, SY, SZ, TD, TG, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, YU, ZA, ZM, ZW only).
NOKIA, INC. [US/US]; 6000 Connection Drive, Irving, TX 75039 (US) (BB only).
ZHANG, Jianzhong [CN/US]; (US) (For US Only).
MANDYAM, Giridhar [US/US]; (US) (For US Only).
GUO, Yuanbin [CN/US]; (US) (For US Only)
Inventors: ZHANG, Jianzhong; (US).
MANDYAM, Giridhar; (US).
GUO, Yuanbin; (US)
Agent: SMITH, Harry, F.; Harrington & Smith, LLP, 4 Research Drive, Shelton, CT 06484-6212 (US)
Priority Data:
10/861,288 04.06.2004 US
Title (EN) FOURIER-TRANSFORM BASED LINEAR EQUALIZATION FOR MIMO CDMA DOWNLINK
(FR) EGALISATION LINEAIRE A BASE DE TRANSFORMEE DE FOURIER POUR LIAISON DESCENDANTE CDMA A ENTREES MULTIPLES/SORTIES MULTIPLES (MIMO)
Abstract: front page image
(EN)In the reception of a downlink MIMO CDMA signal, the receiving unit performs a simplified process of linear equalization that eliminates the need for inverting the correlation matrix. The correlation matrix is approximated to a good degree by a circulation matrix that is diagonalized by FFT operations, thus substituting two FFTs and one IFFT having a complexity of formula (I) for the direct matrix inversion having a complexity of O(LF3).
(FR)Lors de la réception d'un signal CDMA MIMO de liaison descendante, l'unité réceptrice effectue un procédé simplifié d'égalisation linéaire qui élimine la nécessité d'inverser la matrice de corrélation. On parvient à un bon degré d'approximation de la matrice de corrélation par une matrice de circulation qui est diagonalisée par des opérations de transformée de Fourier rapide, remplaçant ainsi deux transformées de Fourier rapides et une transformée de Fourier rapide inverse ayant une complexité de formule (I) pour l'inversion de matrice directe ayant une complexité de O(LF3).
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, 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, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, 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 (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, 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)