Method for locating a target and multistatic radar system for implementing such a method
First Claim
1. A method for locating a target comprising the following steps:
- a) receiving, by means of N≥
1 receivers, opportunity radioelectric signals transmitted by M≥
1 transmitters and reflected by said target, with N·
M≥
3, said or at least one said transmitter being situated out of the sight of said or of at least one said receiver;
b) receiving, by means of a data transmission link, one or more reference signals, representative of the radioelectric signals transmitted by said or each said transmitter situated out of the sight of said or of at least one said receiver; and
c) determining the position of said target on the basis of said radioelectric signals and of said reference signal or signals;
wherein said step c) comprises the reconstruction, on the basis of said reference signal or signals, of replicas of the radioelectric signals which would be received by said or each said receiver by direct propagation from said or from each said transmitter situated out of sight if direct propagation such as this were possible.
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Accused Products
Abstract
A method for locating a target comprises: a) receiving, by means of N≥1 receivers, opportunity radioelectric signals transmitted by M≥1 transmitters and reflected by the target, with N·M≥3, or at least one transmitter being situated out of sight of at least one receiver; b) receiving, by means of a data transmission link, one or more reference signals, representative of the radioelectric signals transmitted by each transmitter situated out of sight of at least one receiver; and c) determining the position of the target on the basis of the radioelectric signals and of the reference signal or of the reference signals. An application of the method to the primary monitoring of air traffic, a multistatic radar system for the implementation of the method, and a system for monitoring air traffic comprising a multistatic radar system are provided.
14 Citations
20 Claims
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1. A method for locating a target comprising the following steps:
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a) receiving, by means of N≥
1 receivers, opportunity radioelectric signals transmitted by M≥
1 transmitters and reflected by said target, with N·
M≥
3, said or at least one said transmitter being situated out of the sight of said or of at least one said receiver;b) receiving, by means of a data transmission link, one or more reference signals, representative of the radioelectric signals transmitted by said or each said transmitter situated out of the sight of said or of at least one said receiver; and c) determining the position of said target on the basis of said radioelectric signals and of said reference signal or signals; wherein said step c) comprises the reconstruction, on the basis of said reference signal or signals, of replicas of the radioelectric signals which would be received by said or each said receiver by direct propagation from said or from each said transmitter situated out of sight if direct propagation such as this were possible. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 20)
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14. A multistatic radar system comprising
M≥ - 1 transmitters of opportunity radioelectric signals, N≥
1 receivers for receiving said radioelectric signals, with N·
M≥
3, said or at least one said transmitter being situated out of the sight of said or of at least one said receiver, as well as data processing means;also comprising a data transmission link for transmitting to said data processing means one or more reference signals, representative of the radioelectric signals transmitted by said or each said transmitter situated out of the sight of said or of at least one said receiver, said data processing means being configured or programmed to determine the position of a target reflecting the radioelectric signals transmitted by said transmitter or said transmitters on the basis of the radioelectric signals received by said receiver or said receivers and of said reference signal or of said reference signals, wherein said data processing means are configured and programmed to reconstruct, on the basis of said reference signal or of said reference signals, replicas of the radioelectric signals which would be received by said or each said receiver by direct propagation from said or from each said transmitter situated out of sight if direct propagation such as this were possible, and to use said replicas to determine the position of said target. - View Dependent Claims (15, 16, 17, 18, 19)
- 1 transmitters of opportunity radioelectric signals, N≥
Specification