Method and apparatus for decoding a quadrature modulated signal

Details Method and apparatus for decoding a quadrature modulated signal Method and apparatus for decoding a quadrature modulated signal

1988-11-02

1990-03-20

Grimm, Siegfried H.

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

329308, 375 81, 375 83, 375 97, 375 98, H04B 126, H04L 2706

Patent

active

049104675

ABSTRACT:
A method of demodulating a quadrature modulated signal includes first receiving the signal. The rf signal is then quadrature demodulated to produce in-phase and quadrature signals. One of these signals is filtered to produce a correction signal which is used for phase and amplitude correction. Both of the demodulated signals are again quadrature demodulated to produce the output signals. The second demodulation can be accomplished utilizing a correlation decoder. The applied correlation pulse includes a subcarrier component.

REFERENCES:
patent: 2960573 (1960-11-01), Hodgson et al.
patent: 3082296 (1963-03-01), Caruthers
patent: 3511936 (1970-05-01), Saltzberg
patent: 3514701 (1970-05-01), Palatinus
patent: 4085378 (1978-04-01), Ryan et al.
patent: 4313211 (1982-01-01), Leland
patent: 4398216 (1983-08-01), Field et al.
patent: 4476585 (1984-10-01), Reed
patent: 4521878 (1985-06-01), Toyonaga
patent: 4559499 (1985-12-01), Bursztejn et al.
patent: 4608540 (1986-08-01), Tsuchiya et al.
patent: 4626803 (1986-12-01), Holm
patent: 4675619 (1987-06-01), Uchibori et al.
patent: 4680777 (1987-07-01), Saha
patent: 4696017 (1987-09-01), Masheff et al.
patent: 4737969 (1988-04-01), Steel et al.

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