Doppler navigation system with tracking filter for multipath dis

Details Doppler navigation system with tracking filter for multipath dis Doppler navigation system with tracking filter for multipath dis

1974-05-01

1976-02-03

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

328167, 325477, 333 76, 178DIG19, 333 17R, G01S 502

Patent

active

039368300

ABSTRACT:
A Doppler navigation system with tracking filter for reducing suceptibility to multipath signals. For acquisition of a Doppler ILS angle representing a signal within a spectrum also containing multipath signals, a self-tracking variable-Q filter arrangement is used, with wide band acquisition (low Q) followed by progressive steering of the filter center frequency to the desired signal frequency, together with decrease of the filter bandwidth to an equivalent of 2 beamwidths (high Q) at final balance.

REFERENCES:
patent: 3110004 (1963-11-01), Pope
patent: 3119961 (1964-01-01), Ambrose
patent: 3262117 (1966-07-01), Stover
patent: 3314026 (1967-04-01), Maynard
patent: 3715690 (1973-02-01), Young et al.

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