Method and system for the conversion of phase shift keying...

Details Method and system for the conversion of phase shift keying... Method and system for the conversion of phase shift keying...

2005-12-13

2005-12-13

Mis, David (Department: 2817)

Demodulators

Phase shift keying or quadrature amplitude demodulator

C329S347000

Reexamination Certificate

active

06975165

ABSTRACT:
A system for the conversion of digital phase shift keying (PSK) signals into digital amplitude shift keying (ASK) signals.The system consists of a power divider, PDIV, with an input, into which a PSK signal at a frequency of 2fis injected, where f is half the frequency of a carrier signal and with an even number M of outputs, from which corresponding signals, i1. . . iM, are obtained at equal frequency and phase, connected to M argument dividers with tuneable natural resonant frequency, Div1. . . DivM, obtaining M output signals, O1. . . OM, from the said dividers and M-1 power combiners, PC1. . . PCM-1, the inputs of which are connected two by two to the said M output signals, O1. . . OM, providing M-1 ASK signals at the outputs of the said power combiners, which correspond respectively to each of the M-1 possible changes in phase of the said input PSK signal.

REFERENCES:
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patent: 4355404 (1982-10-01), Uzunoglu
patent: 4653071 (1987-03-01), Sgrignoli
patent: 4715047 (1987-12-01), Hambley
patent: 5090027 (1992-02-01), Ohsawa
patent: 5818297 (1998-10-01), Levionnais
patent: 2002/0167693 (2002-11-01), Vrazel et al.
patent: 2003/0002121 (2003-01-01), Miyamoto et al.
International Search Report for PCT/ES02/00126; ISA/SPTO; Mailed: May 28, 2002.

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