Pulse or digital communications – Receivers
Reexamination Certificate
2005-08-23
2005-08-23
Corrielus, Jean B. (Department: 2637)
Pulse or digital communications
Receivers
C375S224000, C455S142000
Reexamination Certificate
active
06934342
ABSTRACT:
A analog/digital modulation type discrimination circuit 1 discriminates whether a reception signal is an analog modulation type, a linear modulation type or a non-linear modulation type by digital modulation type. In case where the reception signal is discriminated to be the analog modulation type, an analog modulation type discrimination circuit 2 discriminates whether it is an AM signal or an FM signal among the analog modulation type. In case where the reception signal is discriminated to be the linear modulation type by digital modulation type, a linear modulation type discrimination circuit 3 discriminates whether it is a BPSK signal, a QPSK signal, a π/4-shift QPSK signal, an 8-PSK signal, an M-ary PSK signal of multi-level exceeding 8-levels, a 16 QAM signal or a n M-ary QAM signal of multi-level exceeding 16-levels among the linear modulation type by digital modulation type. In case where the reception signal is discriminated to be the non-linear modulation type by the digital modulation type a non-linear modulation type discrimination circuit 4 discriminates whether it is an M-ary FSK signal, a 2-FSK signal, an MSK signal or a GMSK signal among the non-linear modulation type by the digital modulation type.
REFERENCES:
patent: 5163159 (1992-11-01), Rich et al.
patent: 5251232 (1993-10-01), Nonami
patent: 5289252 (1994-02-01), Nourrcier
patent: 5402449 (1995-03-01), Schultes et al.
patent: 5418815 (1995-05-01), Ishikawa et al.
patent: 5483686 (1996-01-01), Saka et al.
patent: 5598430 (1997-01-01), Hachisuka et al.
patent: 5600673 (1997-02-01), Kimura et al.
patent: 5912922 (1999-06-01), Koszarsky et al.
patent: 6091343 (2000-07-01), Dykema et al.
patent: 62-22141 (1987-01-01), None
patent: 62-128247 (1987-06-01), None
patent: 2-73749 (1990-03-01), None
patent: 5-218914 (1993-08-01), None
patent: 7-7678 (1995-01-01), None
patent: 10-23086 (1998-01-01), None
patent: 10-267972 (1998-10-01), None
patent: 2000-286908 (2000-10-01), None
patent: 2001-111644 (2001-04-01), None
Taira et al., “Automatic Classification of Modulation Types, Including Analogue Types”, Technical Report of IEICE, Dept. of Electrical Engineering, Faculty of Science and Technology, Keio University, Japan, pp. 29-36 (1998)).
Taira et al., “Modulation Type Classification Based on the Block Demodulation Method”, Technial Report of IEICE, Dept. of Electrical Engineering, Faculty of Science and Technology, Keio University, Japan, pp. 47-54 (1997).
Taira et al., “Block Demodulation Method Coping with Modulation Type Variation”, Technical Report of IEICE, Dept. of Electrical Engineering, Faculty of Science and Technology, Keio University, Japan, pp. 7-14 (1997).
Copy of Japanese Office Action dated Feb. 25, 2004 (and English translation of relevant portion).
Dubuc et al., “An Automatic Modulation Recognition Algorithm for Spectrum Monitoring Applications”, Communications Research Center, IEEE International Conference on Communications. Conference Record. Vancouver, CA, pp. 570-574 (Jun. 1999).
Portillo-Garcia et al., “A Microcomputer-based General Architecture for Radiocommunictation Signal Classification and Digital Demodulation”, Proceedings of the European Signal Processing Conference, Barcelona, Spain, pp. 1919-1922 (Sep. 1990).
Iki Yoshimitsu
Ishii Hiroyuki
Kuroda Masahiro
Corrielus Jean B.
Dickstein Shapiro Morin & Oshinsky LLP.
NEC Corporation
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