Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1985-04-18
1987-01-13
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
364452, G01S 124
Patent
active
046367950
ABSTRACT:
A radio ranging system has at least one receiver which receives pulses over a direct path and over a longer delayed path from each of two or more fixed repeater stations. From the reception times of pulses which have traveled over these paths at different travel times from the fixed stations, a computer calculates the hyperbolic distances separating the passive receiver and the several fixed reference stations. By interchanging the roles of the various fixed stations, the computer compares the results of timing calculations of the same distances based on the different sets of data. From this comparison, the systematic timing errors of the system can be isolated and added or subtracted from the time measuring results, leaving differential time measurements without systematic error.
REFERENCES:
patent: 4398198 (1983-08-01), Dano et al.
Pages 10-23 of "Radar System Analysis", by David K. Barton.
Pages 135-139 of "A Coincidence Procedure for Signal Detection", by Mischa Schwartz from the IRE Transactions of Dec. 1956.
Bernat Louis
Blum Theodore M.
Del Norte Technology, Inc.
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