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1. (WO2000028687) OFDM TRANSMITTING/RECEIVING DEVICE AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2000/028687    International Application No.:    PCT/JP1999/006126
Publication Date: 18.05.2000 International Filing Date: 04.11.1999
IPC:
H04L 27/26 (2006.01)
Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. [JP/JP]; 1006, Oaza Kadoma Kadoma-shi, Osaka 571-8501 (JP) (For All Designated States Except US).
SUDO, Hiroaki [JP/JP]; (JP) (For US Only).
ISHIKAWA, Kimihiko [JP/JP]; (JP) (For US Only)
Inventors: SUDO, Hiroaki; (JP).
ISHIKAWA, Kimihiko; (JP)
Agent: WASHIDA, Kimihito; 5th Floor, Shintoshicenter Bldg. 24-1, Tsurumaki 1-chome Tama-shi, Tokyo 206-0034 (JP)
Priority Data:
10/316414 06.11.1998 JP
11/070814 16.03.1999 JP
11/101733 08.04.1999 JP
Title (EN) OFDM TRANSMITTING/RECEIVING DEVICE AND METHOD
(FR) DISPOSITIF EMETTEUR/RECEPTEUR A MULTIPLEXAGE FREQUENTIEL OPTIQUE ET PROCEDE CORRESPONDANT
Abstract: front page image
(EN)A coefficient signal for each sub-carrier is calculated by calculating an average of receiving powers of sub-carriers (A to D) in a control circuit (162) and by dividing the average by an envelope of each sub-carrier (A to D). A transmission signal of each sub-carrier (A to D) output from each of relative mapping circuits (102 to 105) is multiplied by a coefficient signal in each multiplier (106 to 109), whereby powers received at sub-carriers are approximately uniformed to improve error rate characteristics.
(FR)Selon cette invention, on calcule un signal de coefficient pour chaque sous-porteuse en calculant une moyenne des puissances de réception des sous-porteuses (de A à D) dans un circuit de commande (162) et en divisant la moyenne par une enveloppe de chaque sous-porteuse (de A à D). Un signal d'émission de la sortie de chaque sous-porteuse (de A à D) provenant des circuits de mappage respectifs (102 à 105) est multiplié par un signal de coefficient dans chaque multiplicateur (106 à 109), les puissances reçues au niveau des sous-porteuses étant à peu près uniformes afin d'améliorer les caractéristiques relatives au taux d'erreurs.
Designated States: AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, 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.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, 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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)