Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1995-03-30
1997-06-03
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342408, 342436, G01S 144, G01S 116, G01S 504
Patent
active
056359411
ABSTRACT:
A feeding method and device, particularly for a Doppler VOR system, and to a Doppler VOR system using such a feeding device. The feeding method performs a blending function, which is an approximation of the sinX/X function limitedly to the three central lobes, and is obtained by amplitude overmodulation of a single signal according to a periodic function. The blending function can be controlled through the control of the periodic function.
REFERENCES:
patent: 3896444 (1975-07-01), Lin
patent: 4050074 (1977-09-01), Toman
patent: 4086597 (1978-04-01), Sinksy et al.
patent: 4129870 (1978-12-01), Toman
patent: 4382259 (1983-05-01), Becavin et al.
"A Double-Sideband Doppler VHF Omnirange Beacon" by B.R. Johnson et al. vol. 15, AWA Technical Review, No. 1, 1973 pp. 1 - 12.
"The Phillips Doppler VOR Beacon RN 200" by F.L. van den berg, Philips Telecommunication Review, vol. 34, no. 1, Apr. 1976, Doppler VOR beacon RN 200, pp. 1 - 10.
"Principles of Communication Systems" by Herbert Taub, et al. Principles of Communication Systems, Chapter 3 McGraw Hill, 1971.
ALCATEL N.V.
Issing Gregory C.
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