Title:
METHOD FOR DIVIDING THE BIT RATE OF QPSK SIGNALS INTO TWO OR SEVERAL SUBCHANNELS
Document Type and Number:
WIPO Patent Application WO2004014034
Kind Code:
A3
Abstract:
The invention relates to a method for dividing the bit rate of QPSK signals by splitting the spectrum of said QPSK signals into at least two channels having band-limited filters in the modulator and demodulator. The prefiltered QPSK signal is split into at least one real and at least one imaginary spectrum at the transmitter end, is transmitted in frequency multiplex, and the filters in the modulator of the transmitter and the demodulator of the receiver are dimensioned according to the transmission function.
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Inventors:
ZSCHUNKE WILLMUT (DE)
DUSHCHULUUN KHISHIGBAYAR (DE)
DUSHCHULUUN KHISHIGBAYAR (DE)
Application Number:
PCT/EP2003/008335
Publication Date:
April 08, 2004
Filing Date:
July 29, 2003
Export Citation:
Assignee:
RUNDFUNKSCHUTZRECHTE EV (DE)
ZSCHUNKE WILLMUT (DE)
DUSHCHULUUN KHISHIGBAYAR (DE)
ZSCHUNKE WILLMUT (DE)
DUSHCHULUUN KHISHIGBAYAR (DE)
International Classes:
H04L25/03; H04L25/497; H04L27/18; H04L27/26; (IPC1-7): H04L27/18; H04L25/03; H04L25/497
Foreign References:
| US6278732B1 | 2001-08-21 |
Other References:
WALDECK B H ET AL: "PERFORMANCE EVALUATION OF TFO-Q2PSK IN GAUSSIAN, MULTIPATH AND FADING CHANNELS", 1999 IEEE AFRICON 5TH. AFRICON CONFERENCE IN AFRICA, CAPE TOWN, SOUTH AFRICA, 28 September 1999 (1999-09-28) - 1 October 1999 (1999-10-01), NEW YORK, USA, pages 233 - 238, XP000895832, ISBN: 0-7803-5547-4
GRUENBACHER D M ET AL: "N dimensional orthogonal QPSK signaling with discrete prolate spheroidal sequences", RADIO AND WIRELESS CONFERENCE, 1998, COLORADO SPRINGS, CO, USA, 9 August 1998 (1998-08-09) - 12 August 1998 (1998-08-12), NEW YORK, USA, pages 63 - 66, XP010296329, ISBN: 0-7803-4988-1
GRUENBACHER D M ET AL: "A simple algorithm for generating discrete prolate spheroidal sequences", IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 42, no. 11, November 1994 (1994-11-01), NEW YORK, USA, pages 3276 - 3278, XP002269014, ISSN: 1053-587X
GRUENBACHER D M ET AL: "N dimensional orthogonal QPSK signaling with discrete prolate spheroidal sequences", RADIO AND WIRELESS CONFERENCE, 1998, COLORADO SPRINGS, CO, USA, 9 August 1998 (1998-08-09) - 12 August 1998 (1998-08-12), NEW YORK, USA, pages 63 - 66, XP010296329, ISBN: 0-7803-4988-1
GRUENBACHER D M ET AL: "A simple algorithm for generating discrete prolate spheroidal sequences", IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 42, no. 11, November 1994 (1994-11-01), NEW YORK, USA, pages 3276 - 3278, XP002269014, ISSN: 1053-587X
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