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1. WO2007042900 - PHASE NOISE CANCELING OFDM RECEIVER

Publication Number WO/2007/042900
Publication Date 19.04.2007
International Application No. PCT/IB2006/002803
International Filing Date 06.10.2006
IPC
H04L 27/26 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
H04J 11/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
11Orthogonal multiplex systems
CPC
H04L 2027/0032
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
0014Carrier regulation
0024at the receiver end
0026Correction of carrier offset
0032at baseband and passband
H04L 2027/0055
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
0014Carrier regulation
0044Control loops for carrier regulation
0053Closed loops
0055single phase
H04L 2027/0067
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
0014Carrier regulation
0044Control loops for carrier regulation
0063Elements of loops
0067Phase error detectors
H04L 27/0014
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
0014Carrier regulation
H04L 27/2657
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
2655Synchronisation arrangements
2657Carrier synchronisation
H04L 27/2679
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
2655Synchronisation arrangements
2668Details of algorithms
2673characterised by synchronisation parameters
2676Blind, i.e. without using known symbols
2679Decision-aided
Applicants
  • NOKIA CORPORATION [FI]/[FI] (AE, AG, AL, AM, AT, AU, AZ, BA, BB, 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, HN, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SI, SK, SL, SM, SN, SV, SY, SZ, TD, TG, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, ZA, ZM, ZW)
  • NOKIA, INC. [US]/[US] (LC)
  • LINDH, Lars [FI]/[FI] (UsOnly)
Inventors
  • LINDH, Lars
Agents
  • SMITH, Harry, F.
Priority Data
11/251,51514.10.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PHASE NOISE CANCELING OFDM RECEIVER
(FR) RECEPTEUR OFDM A ANNULATION DU BRUIT DE PHASE
Abstract
(EN)
A receiver includes, in series, at least one receive antenna, a buffer, and arithmetic logic block, a symbol detector, and a phase noise estimator. A further feedback loop couples an output of the phase noise estimator to an input of the arithmetic logic block for providing an estimate of phase noise. The buffer is for storing the received signal. The arithmetic logic block, such as a multiplier, is for removing the estimate of phase noise, received via the feedback loop, from the buffered signal. The symbol detector is for estimating a symbol from the output of the arithmetic logic block. The phase noise estimator estimates phase noise from two inputs received from the symbol detector: the estimated symbol and the remainder signal. Preferably, the phase noise estimator performs an IFFT on these two inputs and Kalman filters the result. Iteratively estimating the phase noise improves precision substantially.
(FR)
L'invention se rapporte à un récepteur qui comprend, en série, au moins une antenne de réception, un tampon, et un bloc de logique arithmétique, un détecteur de symboles, et un estimateur de bruit de phase. Une boucle de rétroaction supplémentaire couple une sortie de l'estimateur de bruit de phase à une entrée du bloc logique arithmétique afin de fournir une estimation de bruit de phase. Le tampon permet de stocker le signal reçu. Le bloc logique arithmétique, à la manière d'un multiplicateur, permet d'enlever l'estimation du bruit de phase, reçue via la boucle de rétroaction, du signal tamponné. Le détecteur de symboles permet d'estimer le bruit de phase à partir de deux entrées reçues en provenance du détecteur de symboles: le symbole estimé et le signal restant. De préférence, l'estimateur de bruit de phase effectue une IFFT sur ces deux entrées et le filtre de Kalman filtre le résultat. L'estimation itérative du bruit de phase améliore sensiblement la précision.
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