Direction of arrival estimation
AssigneeMacquarie University
InventorsSam Reisenfeld, Audri Biswas
Life of this patent
Estimating the term…
Abstract
Iterative methods for direction of arrival estimation of a signal at a receiver with a plurality of spatially separated sensor elements are described. A quantized estimate of the angle of arrival is obtained from a compressive sensing solution of a set of equations. The estimate is refined in a subsequent iteration by a computed error based a quantized estimate of the direction of arrival in relation to quantization points offset from the quantization points for the first quantized estimate of the angle of arrival. The iterations converge on an estimated direction of arrival.
Claims20
A method for estimating a direction of arrival of a signal, comprising:
- receiving, at a processor, a set of measurements of the signal received by an array of sensor elements;
- iteratively generating, by the processor, a plurality of measures of a direction of arrival estimate, the plurality of measures related to first and second grids of candidate direction of arrivals respectively, the first and second grids offset from each other by a predetermined amount;
- generating an angular discriminant for each iteration, wherein the first and second grids in a subsequent iteration are offset from the first and second grids in a current iteration by an amount determined by the angular discriminant for the current iteration;
- and
- generating a direction of arrival estimation based on the angular discriminant from at least one iteration.
A method for estimating a direction of arrival of a signal, comprising:
- receiving, at a processor, input signals representative of detection of the signal received by a plurality of spatially separated sensor elements:
- determining, by the processor, a plurality of sparse solutions for Ŝt, in Vn=Φ(Θt)Ŝt;
- and
- generating, by the processor an estimated direction of arrival of the signal received at the sensor elements, wherein the estimated direction of arrival is determined based on an error discriminant determined from the plurality of sparse solutions for Ŝt;
- wherein:
- Vn includes phase information of the input signals;
- Θt represents a grid of points for candidate directions of arrival;
- and
- Φ is a function of Θt and locations of the sensor elements.
A method for estimating a direction of arrival of one or more signals, comprising:
- receiving, at a processor, input signals representative of detection of the one or more signals received by a respective plurality of spatially separated sensor elements;
- in an initial determination and in at least a first iteration determining, by the processor, based on phase information in the input signals and a known geometry of the spatially separated sensor elements, one or more sparse solutions indicating one or more estimated directions of arrival amongst a set of candidate directions of arrival, wherein for each iteration the set of candidate directions of arrival are rotated;
- and
- generating data indicative of the solution for the first iteration or a subsequent iteration, wherein the generated data represents one or more direction of arrival estimates for the one or more signals.
Dependencies are inferred from the claim text.