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Machine translation
1. (WO2002033878) METHOD AND DEVICE FOR IDENTIFYING A DATA PACKET IN A DATA STREAM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/033878    International Application No.:    PCT/EP2001/011253
Publication Date: 25.04.2002 International Filing Date: 28.09.2001
Chapter 2 Demand Filed:    06.05.2002    
IPC:
H04L 7/04 (2006.01), H04L 12/28 (2006.01), H04L 12/56 (2006.01), H04L 25/06 (2006.01)
Applicants: NOKIA MOBILE PHONES LTD. [FI/FI]; Keilalahdentie 4, FIN-02150 Espoo (FI) (For All Designated States Except US).
SCHETELIG, Markus [DE/DE]; (DE) (For US Only).
KAFEMANN, Harald [DE/DE]; (DE) (For US Only)
Inventors: SCHETELIG, Markus; (DE).
KAFEMANN, Harald; (DE)
Agent: URNER, Peter; Ter Meer, Steinmeister & Partner GbR, Mauerkircherstrasse 45, 81679 München (DE)
Priority Data:
100 51 889.3 19.10.2000 DE
Title (EN) METHOD AND DEVICE FOR IDENTIFYING A DATA PACKET IN A DATA STREAM
(FR) METHOD AND DEVICE FOR IDENTIFYING A DATA PACKET IN A DATA STREAM
Abstract: front page image
(EN)The invention relates to a method and a device for identifying a data packet in a data stream, in which by means of a d.c. voltage quota determining circuit (30) the d.c. voltage quota (dc) for a demodulated digital input signal (S¿in?) is calculated, in which a k-bit word is allocated to the input signal (S¿in?), in that for each symbol of the input signal (S¿in?) corresponding to a bit a bit value (1 or 0) is determined by a decoding circuit (37) as a function of the d.c. voltage quota (dc), in which the k-bit word corresponding to the input signal (S¿in?) is compared by a comparison and correlation calculating circuit (41) with an expected k-bit synchronisation word in order to determine a correlation value (c¿v?) and in which a packet identification signal (P¿d?) is generated by a correlation value comparison circuit (43) if the correlation value (c¿v?) is greater than a correlation threshold value (c¿th?). Calculation of the d.c. voltage quota (dc) is therein repeated continually at least until a packet identification signal (P¿d?) indicates that a data packet is being received.
(FR)The invention relates to a method and a device for identifying a data packet in a data stream, in which by means of a d.c. voltage quota determining circuit (30) the d.c. voltage quota (dc) for a demodulated digital input signal (S¿in?) is calculated, in which a k-bit word is allocated to the input signal (S¿in?), in that for each symbol of the input signal (S¿in?) corresponding to a bit a bit value (1 or 0) is determined by a decoding circuit (37) as a function of the d.c. voltage quota (dc), in which the k-bit word corresponding to the input signal (S¿in?) is compared by a comparison and correlation calculating circuit (41) with an expected k-bit synchronisation word in order to determine a correlation value (c¿v?) and in which a packet identification signal (P¿d?) is generated by a correlation value comparison circuit (43) if the correlation value (c¿v?) is greater than a correlation threshold value (c¿th?). Calculation of the d.c. voltage quota (dc) is therein repeated continually at least until a packet identification signal (P¿d?) indicates that a data packet is being received.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, 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, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, 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)