Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Navigational
Patent
1983-09-30
1987-02-10
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Navigational
364451, G01S 1376
Patent
active
046426396
ABSTRACT:
A multichannel DME ranging circuit is described which is capable of simultaneous multistation operation. A microprocessor is coupled to control associated peripheral devices and the receiver/transmitter of a DME to produce a multiplexing for receiving frequency data input from up to three DME ground stations. The data received from each of the three DME stations is used to generate timing and interface signals to control the DME receiver/transmitter and associated video processing circuitry. The video processing circuitry is in turn used to provide signals to the ranging circuit to independently determine range, velocity, time-to-station, and the identity of each of the stations providing input to the DME. Each of the three channels is operated indpendently to produce a decoded identification of its respective ground station. The identity information can be obtained and monitored for each channel essentially simultaneously due to the fast cyclical time-multiplexed method of operation, relative to the slower identity coding scheme utilized in present distance measuring equipment.
REFERENCES:
patent: Re30069 (1979-08-01), Miller
patent: 3801979 (1974-04-01), Chisholm
patent: 3821523 (1974-06-01), Chisholm et al.
patent: 3975731 (1976-08-01), Latham et al.
patent: 4032756 (1977-06-01), Jezo
Barron Jr. Gilberto
Greenberg Howard R.
Hamann H. Fredrick
Mayes Robert C.
Rockwell International Corporation
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