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PCT World Intellectual Property Organization
International Bureau
WIPO
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
(51) International Patent Classification7
H04L 25/03, H04B 7/08, H04L 7/033, 7/04
A1
(11) International Publication Number WO 01/89165
(43) International Publication Date 22 November 2001 (22.11.2001)
(21) International Application Number PCT/RU00/00181
(22) International Filing Date 16 May 2000 (16.05.2000)
(71)Applicant:
NORTEL NETWORKS LIMITED World Trade Center of Montreal, 380 St. Antoine Street West, 8th Floor, Montreal, Québec H2Y 3Y4; (CA). [CA/CA].(for all designated States except US)
(72)(75)Inventors; and
Inventors/Applicants:
WANG, Rui, R. 1204-900 Dynes Road, Ottawa, Ontario K2C 3L6; (CA) [CA/CA].TONG, Wen 904-1000 Castle Hill Crescent, Ottawa, Ontario K2C 3L7; (CA) [CA/CA].SHINAKOV, Yuri S. ul. Vilnusskaya, 7-2-125, Moscow, 117574; (RU) [RU/RU].CHLOMA, Alexandre M. ul. Gagarina, g. Zhukovsky, Moskovskaya oblast, 140160; (RU) [RU/RU].BAKOULINE, Mikhail G. ul. Kirova, 35-31, Podolsk, Moskovskaya oblast, 142110; (RU) [RU/RU].KREINDELINE, Vitali B. ul. Grajvoronosvkaya, 8-1-87, Moscow, 109518; (RU) [RU/RU].
(74) Agent
KLJUKIN, Vyacheslav Alexandrovich Prechistensky pereulok 14-1, Moscow, 119034; (RU).
(81) Designated States (national)
AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, 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, 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
(84) Designated States (regional)
ARIPO patent (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, UG, ZW), Eurasian patent (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), European patent (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OAPI patent (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Published
with international search report

(54) Title CELLULAR COMMUNICATIONS SYSTEM RECEIVERS
(57) Abstract
An impulse response matrix of a received signal in a TDMA communications system is approximated using a plurality of indirect variables of a linear complex vector. The indirect variables are used for synchronizing to the received signal (14A, 14B) and for tracking (16A, 16B) and frequency offset estimation (22) during successive samples of the received signal, the samples being equalized in dependence upon the indirect variables (18). A demodulated signal (28) is derived from the equalized received signal samples. Individual synchronization (14A, 14B) and tracking units (16A, 16B), and a single equalizer (18), can be provided for a two-antenna receiver. Tracking errors can be used to adapt a parameter of the equalizer to reduce interference in the received signal (30).
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