公开(公告)号：US20160131754A1

公开(公告)日：2016-05-12

申请号：US14904405

申请日：2014-07-15

Applicant: THALES

Inventor： Pascal CORNIC ,  Patrick LE BIHAN ,  Régis LEVAUFRE

IPC: G01S13/44 ,  G01S3/74

CPC classification number: G01S13/4454 ,  G01S3/74

Abstract: A device for detecting electromagnetic signals comprising an array receive antenna having N radiating elements and M receive channels downstream of the receive antenna, M less than N, the pointing directions of the antenna, equal to the radiating elements, obtained by adaptive beamforming and regularly spaced apart, comprises: switching the M receive channels onto the radiating elements in successive sequence cycles, M radiating elements connected to the receive channels with each sequence, the same radiating element, being the reference element, connected to the receive channels for all sequences, one cycle completed when all radiating elements are connected to one of the receive channels; for each sequence, estimating two-by-two spatial correlations of the signal received on the reference channel and the signals received on the other M-1 receive channels, then estimating the spatial power spectral density in N incoming directions based on a coherent sum of N correlation terms obtained.

Abstract translation: 一种用于检测电磁信号的装置，包括具有N个辐射元件的阵列接收天线和在接收天线下游的M个接收信道，M小于N，天线的指向方向等于通过自适应波束成形获得的辐射元件，并且规则间隔 包括：以连续的顺序循环将M个接收信道切换到辐射元件上，将与每个序列连接到接收信道的M个辐射元件相同，相同的辐射元件作为参考元件，连接到所有序列的接收信道，一个 当所有辐射元件连接到接收通道之一时，循环完成; 对于每个序列，估计在参考信道上接收的信号和在另一个M-1个接收信道上接收的信号的二乘二空间相关性，然后基于相干和的相干和，估计N个入方向中的空间功率谱密度 获得N个相关项。

公开(公告)号：US20140225761A1

公开(公告)日：2014-08-14

申请号：US14175620

申请日：2014-02-07

Applicant: THALES

Inventor： Patrick GARREC ,  Pascal CORNIC ,  Régis LEVAUFRE

IPC: G01S13/74 ,  G01S13/91 ,  G01S13/87

CPC classification number: G01S13/74 ,  G01S7/4052 ,  G01S13/751 ,  G01S13/872 ,  G01S13/913 ,  G01S2007/4082

Abstract: A transponder, able to equip a cooperative target facing a Doppler radar, includes at least one receiving antenna able to receive a signal transmitted by said radar and a transmitting antenna able to retransmit a signal. The signal received by the receiving antenna is amplitude-modulated before being retransmitted by the transmitting antenna to produce a variation of the radar cross-section of the target, the variation triggering a frequency shift between the signal transmitted and the signal received by the radar comparable to a Doppler echo. The transponder applies notably to the field of radars, more particularly for collaborative systems also operating at low velocity or nil velocity. It applies for example to assisted take-off, landing and deck-landing of drones, in particular rotary-wing drones, as well as manned helicopters.

Abstract translation: 能够装备面向多普勒雷达的协作目标的应答器包括能够接收由所述雷达发射的信号的至少一个接收天线和能够重发信号的发射天线。 接收天线接收到的信号在由发射天线重传之前进行幅度调制，以产生目标雷达横截面的变化，触发发射信号与雷达接收信号之间频移的变化可比 到多普勒回波。 应答器特别适用于雷达领域，特别适用于还以低速或零速度运行的协同系统。 例如，它适用于无人机，特别是旋翼无人机以及载人直升机的辅助起飞，着陆和甲板着陆。