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1. (WO2019029827) POLYPHASE DIGITAL SIGNAL PREDISTORTION IN RADIO TRANSMITTER
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Pub. No.: WO/2019/029827 International Application No.: PCT/EP2017/070494
Publication Date: 14.02.2019 International Filing Date: 11.08.2017
IPC:
H03F 1/32 (2006.01) ,H03F 3/24 (2006.01) ,H04L 27/36 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32
Modifications of amplifiers to reduce non-linear distortion
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20
Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
24
of transmitter output stages
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
32
Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18, or H04L27/26213
34
Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
36
Modulator circuits; Transmitter circuits
Applicants:
NOKIA SOLUTIONS AND NETWORKS OY [FI/FI]; Karaportti 3 02610 Espoo, FI
Inventors:
WEBER, Michael; DE
JELONNEK, Bjoern; DE
HELLMANN, Jan; DE
Priority Data:
Title (EN) POLYPHASE DIGITAL SIGNAL PREDISTORTION IN RADIO TRANSMITTER
(FR) PRÉDISTORSION DE SIGNAL NUMÉRIQUE POLYPHASÉ DANS UN ÉMETTEUR RADIO
Abstract:
(EN) A method comprises obtaining a transmission signal to be power-amplified in a power amplifier (361) prior to transmission; separating the transmission signal into two or more polyphase components of the transmission signal; feeding one or more polyphase components of the transmission signal comprised in the two or more polyphase components to each of two or more parallel predistortion circuits (320,321,322); selecting a dedicated predistortion model and dedicated predistortion coefficients for each of the two or more parallel predistortion circuits (320,321,322); performing non-linear memory-based modeling on the transmission signal according to the selected dedicated predistortion models and coefficients using the one or more polyphase components; and combining output signals of the two or more parallel predistortion circuits (320,321,322) to form a predistorted transmission signal (y[n]) to be applied to the power amplifier (361).
(FR) L'invention concerne un procédé consistant à obtenir un signal de transmission devant être amplifié en puissance dans un amplificateur de puissance (361) avant la transmission; séparer le signal de transmission en au moins deux composantes polyphasées; envoyer une ou plusieurs composantes polyphasées du signal de transmission compris dans lesdites au moins deux composantes polyphasées à chaque circuit d'au moins deux circuits de prédistorsion parallèles (320, 321, 322); sélectionner un modèle de prédistorsion dédié et des coefficients de prédistorsion dédiés pour chaque circuit desdits au moins deux circuits de prédistorsion parallèles (320, 321, 322); effectuer une modélisation non linéaire basée sur une mémoire sur le signal de transmission selon les modèles et coefficients de prédistorsion dédiés sélectionnés à l'aide desdites au moins deux composantes polyphasées; et combiner des signaux de sortie desdits au moins deux circuits de prédistorsion parallèles (320, 321, 322) pour former un signal de transmission pré-distordu (y [n]) à appliquer à l'amplificateur de puissance (361).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)