Direction finding method
AssigneeDSO National Laboratories
InventorsSee Chong Meng Samson, Gim Pew Quek
Life of this patent
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Abstract
Determining the angle of arrival of a signal by providing a plurality of antennae, sampling, in turn, the output from each of the antennae to obtain a set of samples, each of the samples relating to different points in time, performing a Fourier transform on the set of samples, thereby producing a sequence of spectral lines, identifying a signal impinging on the antennae from the configuration of the spectral lines, and calculating, from phase and amplitude data gathered from at least a subset of the spectral lines, the direction of arrival of the signal at the antennae.
Claims15
A method of determining the angles of arrival of a plurality of signals, the method comprising the steps of:
- providing a plurality of antennae;
- sampling, in turn, the output from each of the antennae, to obtain a set of samples, each of the samples relating to different points in time;
- performing a Fourier transform on the set of samples, thereby producing a sequence of spectral lines;
- identifying each of a plurality of signals impinging on the antennae from the configuration of the spectral lines;
- and
- calculating, from phase and amplitude data gathered from at least respective subsets of the spectral lines, the directions of arrival of each of the plurality of signals at the antennae.
A direction finder comprising:
- a plurality of antennae;
- a receiver, operable to collect samples from the antennae;
- a switching network, operable to connect the antennae, in turn, to the receiver;
- and
- a processor operable to:
- receive a set of samples from the receiver, each of the samples relating to different points in time;
- perform a Fourier transform on the set of samples, thereby producing a sequence of spectral lines;
- identify a plurality of signals impinging on the antennae from the configuration of the spectral lines;
- and
- calculate, from phase and amplitude data gathered from at least a subset of the spectral lines, the direction of arrival of each of the plurality of signals at the antennae.
A direction finder comprising:
- a plurality of antennae;
- a receiver, operable to collect samples from the antennae;
- a switching network, operable to connect the antennae, in turn, to the receiver;
- and
- processing means operable to:
- receive a set of samples from the receiver, each of the samples relating to different points in time;
- perform a Fourier transform on the set of samples, thereby producing a sequence of spectral lines;
- identify a plurality of signals impinging on the antennae from the configuration of the spectral lines;
- and
- calculate, from phase and amplitude data gathered from at least a subset of the spectral lines, the direction of arrival of each of the plurality of signals at the antennae.
Dependencies are inferred from the claim text.