Apparatus for detecting the presence or the absence of a digital

Details Apparatus for detecting the presence or the absence of a digital Apparatus for detecting the presence or the absence of a digital

1995-11-30

2000-06-27

Pham, Chi H.

Pulse or digital communications

Receivers

Angle modulation

375340, 327 18, H04L 2714, H04L 2716, H04L 2722

Patent

active

060815590

ABSTRACT:
The invention relates to apparatus for detecting the presence or the absence of a signal carrier wave received by a receiver. The carrier wave is modulated by a digital signal at a symbol clock frequency. According to the invention, the apparatus includes:

REFERENCES:
patent: 3835404 (1974-09-01), Nakamura et al.
patent: 4780887 (1988-10-01), Otani et al.
patent: 4871975 (1989-10-01), Nawata et al.
patent: 4890302 (1989-12-01), Muilwijk
patent: 5012492 (1991-04-01), Sexton et al.
patent: 5247543 (1993-09-01), Tsuda et al.
patent: 5412687 (1995-05-01), Sutton et al.
patent: 5563908 (1996-10-01), Kaku et al.
Patent Abstracts of Japan, vol. 13, No. 413 (E-820) Sep. 12, 1989 corresponding to JP-A-01 152811 (Akai Electric Co. Ltd) dated Jun. 15, 1989.

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