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. (WO2005032085) COMPUTATION OF SOFT BITS FOR A TURBO DECODER IN A COMMUNICATION RECEIVER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/032085    International Application No.:    PCT/JP2004/014423
Publication Date: 07.04.2005 International Filing Date: 24.09.2004
IPC:
H04L 25/06 (2006.01), H04L 27/38 (2006.01)
Applicants: NEC CORPORATION [JP/JP]; 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP) (For All Designated States Except US).
BUI, Thanh, Ngoc [VN/AU]; (AU) (For US Only)
Inventors: BUI, Thanh, Ngoc; (AU)
Agent: MIYAZAKI, Teruo; 8th Floor, 16th Kowa Bldg., 9-20, Akasaka 1-chome, Minato-ku, Tokyo 1070052 (JP)
Priority Data:
2003905272 26.09.2003 AU
2004212605 20.09.2004 AU
Title (EN) COMPUTATION OF SOFT BITS FOR A TURBO DECODER IN A COMMUNICATION RECEIVER
(FR) CALCUL DE BITS LOGICIELS POUR UN DECODEUR TURBO DANS UN RECEPTEUR DE COMMUNICATION
Abstract: front page image
(EN)A device (20) for computing a threshold Sthi used in demodulating a quadrature amplitude modulated (QAM) signal to generate a plurality of soft bits per received symbol for input to a turbo decoder, the device including: means (30) for computing the mean amplitude A of the received symbols and multiplying the mean amplitude A by of the received symbols and multiplying the mean amplitude A by a constant Ci for a square QAM constellation with 4m points, such that Sthi = A x Ci where m is a positive integer and i is a positive integer from 1 to (√4m-1)-1.
(FR)Un dispositif (20) permet de calculer un seuil Sthi utilisé dans la démodulation d'un signal de modulation d'amplitude en quadrature (MAQ) afin de générer une pluralités de bits logiciels pour un symbole reçu en vue de son entrée dans un décodeur turbo, le dispositif comprenant: des moyens (30) de calcul de l'amplitude moyenne A des symboles reçus et de multiplication de l'amplitude moyenne A par les symboles reçus et de multiplication de l'amplitude moyenne A par un constante Ci pour une constellation MAQ carrée avec 4m points de manière que Sthi = AxCi, où m désigne un entier positif et i désigne un entier positif allant de 1 à (√4m-1)-1.
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, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, 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, 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, IT, 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)