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1. (WO2017019150) NON-LINEAR TRANSMITTER PRE-CODING
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2017/019150 International Application No.: PCT/US2016/032764
Publication Date: 02.02.2017 International Filing Date: 16.05.2016
IPC:
H04L 25/03 (2006.01) ,H04L 27/08 (2006.01) ,H03F 1/32 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
02
Details
03
Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
02
Amplitude-modulated carrier systems, e.g. using on/off keying; Single sideband or vestigial sideband modulation
08
Amplitude regulation arrangements
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
Applicants: NORTHROP GRUMMAN SYSTEMS CORPORATION[US/US]; 2980 Fairview Park Drive Falls Church, VA 22042-4511, US
Inventors: LIU, Daniel, N.; US
Agent: MILLER, John, A.; US
Priority Data:
14/809,94827.07.2015US
Title (EN) NON-LINEAR TRANSMITTER PRE-CODING
(FR) PRÉCODAGE D'ÉMETTEUR NON LINÉAIRE
Abstract:
(EN) A method for pre-coding a digital signal in a transmitter associated with a digital communications system to remove non-linear distortions. The method converts digital bits to be transmitted to a transmit constellation including symbols defining a plurality of the bits and subtracting a modeled constellation from the transmit constellation to provide a pre-coded constellation. The method performs a modulo operation on the pre-coded constellation to limit the number of symbols that are transmitted at any particular point in time and models the pre-coded constellation after the modulo operation using a Volterra series model, where a plurality of terms in the Volterra series are separately modeled and each modeled term of the constellation is added together to provide the modeled constellation. The method filters the pre-coded constellation to interpolate a symbol sequence in the constellation and shape the constellation and converts the shaped constellation to an analog signal to be transmitted.
(FR) La présente invention concerne un procédé permettant de précoder un signal numérique dans un émetteur associé à un système de communication numérique pour éliminer des distorsions non linéaires. Le procédé convertit des bits numériques qui doivent être transmis en une constellation de transmission comprenant des symboles définissant une pluralité de bits et soustrayant une constellation modélisée de la constellation de transmission de sorte à fournir une constellation précodée. Le procédé effectue une opération modulo sur la constellation précodée de sorte à limiter le nombre de symboles qui sont transmis à n'importe quel moment particulier dans le temps et modélise la constellation précodée après l'opération modulo à l'aide d'un modèle de série de Volterra, une pluralité de termes dans la série de Volterra étant modélisés séparément et chaque terme modélisé de la constellation étant ajouté ensemble afin de fournir la constellation modélisée. Le procédé filtre la constellation précodée pour interpoler une séquence de symboles dans la constellation et former la constellation et convertit la constellation formée en un signal analogique qui doit être transmis.
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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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 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)