Post-reception focusing in remote detection systems
First Claim
1. An apparatus for detecting a reflector, comprising a plurality of transmitting elements, and a plurality of receiving elements, and processing means for processing signals received by the receiving elements, in which the transmitting and receiving elements are arranged in two dimensional arrays, the transmitting elements are energised one at a time and the signals received by the plurality of receiving elements, for each actuation of the transmitting elements, and the signals are processed so as to bring signals propagating from at least two of the transmitting elements to at least one of the plurality of receiving elements via a selected potential reflector location into coincidence.
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Accused Products
Abstract
An apparatus is provided in which individual transmit elements (18) of a transmit array are actuated in turn in order to interrogate a search volume Signals reflected from the volume are received by one or more reception elements (20) of a receive array and are recorded. The propagation parts to a selected cell are calculated and appropriate phase and or time shifts are inserted into the recorded data to simulate, post reception, the shifts that would have occurred if either or both of the transmit and receive arrays had been focused on the cell using phased array beam steering techniques.
158 Citations
28 Claims
- 1. An apparatus for detecting a reflector, comprising a plurality of transmitting elements, and a plurality of receiving elements, and processing means for processing signals received by the receiving elements, in which the transmitting and receiving elements are arranged in two dimensional arrays, the transmitting elements are energised one at a time and the signals received by the plurality of receiving elements, for each actuation of the transmitting elements, and the signals are processed so as to bring signals propagating from at least two of the transmitting elements to at least one of the plurality of receiving elements via a selected potential reflector location into coincidence.
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28. A method of detecting a remote reflector, comprising the steps of:
- actuating sequentially individual element of a transmit array to receive respective signal, recording reflected signals received at least one element of a receive array for each actuation of the transmit elements; and
processing the received signals to shift them so as to synthesise in the received signals the delays and phase shifts that would have been introduced between the signals transmitted from the plurality of transmit elements in order to steer or focus a beam of energy using phased array techniques.
- actuating sequentially individual element of a transmit array to receive respective signal, recording reflected signals received at least one element of a receive array for each actuation of the transmit elements; and
Specification