Title:
A RECEIVER, A DEMODULATOR, AND A DEMODULATION METHOD
Document Type and Number:
WIPO Patent Application WO1997042741
Kind Code:
A3
Abstract:
In a quadrature receiver for phase and/or frequency modulated signals an intermediate phase signal is quantized to produce a quantized phase signal. The receiver includes a demodulator in which pulses are generated from the quantized phase signal and it is determined whether two successive pulses have different polarities, and if so, a reconstructed baseband signal transition is produced at a predetermined reconstruction instant between the two successive pulses. The reconstruction instant is chosen in the middle between two successive pulses for FSK modulation, and it is chosen at different positions between the two pulses for other types of modulation, such as GMSK or multi-level FSK.
Inventors:
BALTUS PETRUS GERARDUS MARIA
JANSSEN AUGUSTUS JOSEPHUS ELIZ
JANSSEN AUGUSTUS JOSEPHUS ELIZ
Application Number:
PCT/IB1997/000456
Publication Date:
December 31, 1997
Filing Date:
April 30, 1997
Export Citation:
Assignee:
PHILIPS ELECTRONICS NV (NL)
PHILIPS NORDEN AB (NL)
PHILIPS NORDEN AB (NL)
International Classes:
H04L27/22; H04L27/14; H04L27/233; (IPC1-7): H04L27/22
Foreign References:
| GB2286950A | 1995-08-30 | |||
| US4994928A | 1991-02-19 | |||
| US4897620A | 1990-01-30 | |||
| EP0151334A2 | 1985-08-14 |
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