(19)
(11) EP 0 847 642 A1

(12)

(43) Date of publication:
17.06.1998 Bulletin 1998/25

(21) Application number: 96928969.0

(22) Date of filing: 21.08.1996
(51) International Patent Classification (IPC): 
H04L 27/ 00( . )
H04J 11/ 00( . )
H03D 1/ 22( . )
H04L 27/ 26( . )
(86) International application number:
PCT/US1996/013526
(87) International publication number:
WO 1997/008877 (06.03.1997 Gazette 1997/11)
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 31.08.1995 US 19950003018
21.02.1996 US 19960604276

(71) Applicant: USA Digital Radio Partners, L.P.
Linthicum, MD 21090 (US)

(72) Inventors:
  • CARLIN, Barry, W.
    Cincinnati, OH 45218 (US)
  • DAPPER, Mark, J.
    Cincinnati, OH 45244 (US)
  • GEILE, Michael, J.
    Loveland, OH 45140 (US)

(74) Representative: KUHNEN, WACKER & PARTNER 
Alois-Steinecker-Strasse 22
85354 Freising
85354 Freising (DE)

   


(54) AM COMPATIBLE DIGITAL WAVEFORM DEMODULATION USING A DUAL FFT