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1. (WO1998051049) MULTICARRIER RECEIVER AND METHOD FOR USE IN DAB RECEIVER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051049 International Application No.: PCT/GB1998/001299
Publication Date: 12.11.1998 International Filing Date: 05.05.1998
Chapter 2 Demand Filed: 03.11.1998
IPC:
H04H 20/72 (2008.01) ,H04L 27/26 (2006.01) ,H04H 40/18 (2008.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
H
BROADCAST COMMUNICATION
20
Arrangements for broadcast or for distribution combined with broadcast
65
Arrangements characterised by transmission systems for broadcast
71
Wireless systems
72
of terrestrial networks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
26
Systems using multi-frequency codes
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
H
BROADCAST COMMUNICATION
40
Arrangements specially adapted for receiving broadcast information
18
Arrangements characterised by circuits or components specially adapted for receiving
Applicants:
BRITISH BROADCASTING CORPORATION [GB/GB]; Broadcasting House London W1A 1AA, GB (AllExceptUS)
MOSS, Peter, Neil [GB/GB]; GB (UsOnly)
Inventors:
MOSS, Peter, Neil; GB
Agent:
ABNETT, Richard, Charles; Reddie & Grose 16 Theobalds Road London WC1X 8PL, GB
Priority Data:
9709023.702.05.1997GB
Title (EN) MULTICARRIER RECEIVER AND METHOD FOR USE IN DAB RECEIVER
(FR) DISPOSITIF DE RECEPTION EN DIVERSITE DE FREQUENCE ET PROCEDE D'UTILISATION DANS UN RECEPTEUR DE RADIODIFFUSION AUDIONUMERIQUE
Abstract:
(EN) A digital audio broadcasting (DAB) receiver designed for receiving a signal with 1536 active carriers generated by an inverse fast Fourier transform (FFT) with 2048 points, includes the usual RF stage (14), an IF filter (20), and a demodulator (22). This is followed by an anti-aliasing filter (28), a sampler (30), and an FFT (32). The FFT is a 4096-point FFT, and is thus twice as long as required, and gathers twice as many points during each symbol period. However this is found to substantially simplify the construction of the IF filter (20) and, more particularly, the anti-aliasing filter (28).
(FR) L'invention concerne un récepteur de radiodiffusion audionumérique conçu pour recevoir un signal à 1536 porteuses actives générées par une transformée de Fourier rapide (TFR) inverse à 2048 points, le récepteur comprenant l'étage HF habituelle (14), un filtre à fréquence intermédiaire (20) et un démodulateur (22), suivis d'un filtre antirepliement de spectre (28), d'un échantillonneur (30), et d'une TFR (32). La TFR est une TFR à 4096 points, et est donc deux fois plus longue que nécessaire et rassemble deux fois plus de points pendant chaque durée du symbole. Cependant il a été découvert que cela simplifiait sensiblement la réalisation du filtre à fréquence intermédiaire (20) et plus particulièrement, du filtre antirepliement du spectre (28).
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, 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, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, 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, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0979567US6700936DE000069820606GB2324936AU1998072259