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Array signal processing
- D. Davies, K. Corless, D. Hicks, K. Milne
- Business
- 1983
Array signal processing (ASP) represents a class of antenna system where the output from an array is subjected to various forms of signal processing (e.g. phase and amplitude control, time delay or…
Optical coherence-domain reflectometry: a new optical evaluation technique.
- R. Youngquist, S. Carr, D. Davies
- PhysicsOptics letters
- 1 March 1987
An optical evaluation technique is described that is suitable for determining the positions and magnitudes of reflection sites within miniature optical assemblies. This method utilizes the coherence…
A transformation between the phasing techniques required for linear and circular aerial arrays
- D. Davies
- Engineering
- 1 November 1965
The paper describes a method for producing an angular deflection, or continuous rotation, of any directional pattern formed from a circular (or cylindrical) array, by means of a simple linear…
Effect of directional elements on the directional response of circular antenna arrays
The paper analyses the effect of directional elements on circular antenna arrays fed by phase-mode excitations. These phase modes represent a convenient pattern-synthesis technique for circular…
Low sidelobe patterns from thinned arrays using multiplicative processing
The paper describes a new technique for achieving low-sidelobe directional patterns (-35 dB) from thinned arrays. The concept employs multiplicative processing and is therefore restricted to…
Independent angular steering of each zero of the directional pattern for a linear array
- D. Davies
- Mathematics
- 1 March 1967
Directional properties of circular arrays
- I. Longstaff, P. Chow, D. Davies
- Geology
- 1 June 1967
The paper discusses the possible forms of directional patterns obtainable for single-ring circular arrays. Consideration is given only to the patterns which lie in the same plane as the array. A…
Synthesis of a single null response in an otherwise omnidirectional pattern using a circular array
TLDR
OFDR diagnostics for fibre and integrated-optic systems
- S. Kingsley, D. Davies
- Physics
- 9 May 1985
Optical frequency-domain reflectometry (OFDR) shows promise as a diagnostic tool for high-resolution ranging in fibre/integrated-optic systems, and in high-resolution distributed fibre-optic sensors.…
Method of phase-modulating signals in optical fibres: application to optical-telemetry systems
- D. Davies, S. Kingsley
- Physics
- 24 January 1974
By attaching a piezoelectric transducer that modulates the mechanical tension over a short section of fibre, signals in optical fibres are phase modulated. The technique is applicable to a I-way…
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