Title: Doppler navigation system with reference signal source diversity

Abstract: A Doppler Radio Navigation beacon with multi-element reference and main commutated arrays. The reference signal is programmed among the reference array elements irregularly to provide spatial diversity to the reference signal to eliminate or substantially reduce reference masking effects in certain multi-path situations (as observed at a remote receiving station such as on an aircraft on landing approach deriving angle information from said beacon). A similar irregular element excitation program is imposed on the normal array preserving coherence in the relative radiator movement (during commutation) between reference and main arrays.

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Inventors: Overbury, Francis G. (Cuffley, EN)
Barton, Paul (Bishop Stortford, EN)

Application Number: 752537
Filing Date: 1976-12-20
Publication_date: 1977-12-13
Assignee: International Standard Electric Corporation (New York, NY)
Primary Class(es): 342/374 342/405, 342/408
Other Classes:
US Patent Ref:

3728729

Apr, 1973

Overbury

343/108.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Blum, T. M.
Attorney: O'Neil; W. T.