Title:
DEMODULATION CIRCUIT FOR MULTI-VALUED CARRIER WAVE DIGITAL SIGNAL
Document Type and Number:
Japanese Patent JPS5275966
Kind Code:
A
Abstract:
PURPOSE: To realize demodulation and reproduction circuit of 4-level QAM signal by adding two subtraction circuits and two discrimination reproduction circuits to ordinary 4-phase PSK signal demodulation circuit.
Inventors:
WASHIO MAKOTO
ISHIO HIDEKI
ISHIO HIDEKI
Application Number:
JP15230975A
Publication Date:
June 25, 1977
Filing Date:
December 20, 1975
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04L27/38; H03D3/00; H04B1/00; (IPC1-7): H03D3/00; H04B1/00
Domestic Patent References:
| JPS5422742A | 1979-02-20 |