QAM signal receiver

Details QAM signal receiver QAM signal receiver

1998-11-06

2000-07-11

Ghebretinsae, Temesghen

Pulse or digital communications

Receivers

Angle modulation

375261, 329304, H04L 2714

Patent

active

060884010

ABSTRACT:
To provide a QAM signal receiver wherein the phase distortion derived from frequency conversion into IF signal is corrected in accordance with selection of an RF channel to be received, the QAM signal receiver comprises a first and a second pre-equalizer (9 and 10) made of transversal filters for processing an in-phase and a quadrature-phase digital signal obtained from the QAM signal; a first and a second equalizer controller (12 and 13) for selecting tap gains to be applied to the first and the second pre-equalizer (9 and 10) in synchronization with selection of the RF channel according to a channel-selection signal for controlling a freqency converter (2).

REFERENCES:
patent: 4004226 (1977-01-01), Qureshi et al.
patent: 4028626 (1977-06-01), Motley et al.
patent: 4253184 (1981-02-01), Gitlin et al.
patent: 5113142 (1992-05-01), Yoshikawa

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