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Processing method for coherent MIMO radar using ddma waveforms

A processing method and radar technology, applied in the field of MIMO radar

Pending Publication Date: 2021-05-04
THALES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the article, the method of selecting samples from the various transmitters is not mentioned, but since the radar used is an S-band radar as described above, the required accuracy of the carrier velocity is not an issue

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  • Processing method for coherent MIMO radar using ddma waveforms
  • Processing method for coherent MIMO radar using ddma waveforms
  • Processing method for coherent MIMO radar using ddma waveforms

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Embodiment Construction

[0050] According to the first and second embodiments of the present invention, the method comprises three steps.

[0051] In the first step, including NT X Radars with transmitters up to NT X Waveforms are generated on each transmitter. According to the first embodiment described in detail below, the NT X One of the transmitters is turned off. According to a second embodiment, also described in detail below, all transmitters are activated. As mentioned above, the principle of the DDMA waveform is to transmit the same radar pulses within a phase ramp specific to each transmitter from one transmitter to the next at each pulse repetition interval. Phase ramps are created by phase shifters, which are relatively easy components to integrate. Next, each received echo is processed by a matched filter bank (ie, one filter per waveform).

[0052] The processing method according to the present invention can be implemented at one, several or even all of the receivers. Application ...

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Abstract

Disclosed is a processing method for coherent mimo radar using ddma waveforms. The method processes DDMA waveforms and includes NTX transmitters and NRX receivers, comprising the steps of a) generating waveforms on at most NTX transmitters, the waveforms, modulo the pulse repetition frequency Fr, being identical from one transmitter to the next, to within a phase ramp specific to each transmit path; b) generating, for at least one receiver, a Range-Doppler representation of the echoes of the transmitted waveforms, where, for each receiver, the echoes of a transmitter over a plurality of range cells occupy at least one frequency cell in the Doppler spectrum, called signal band, each signal band being specific to one of the transmitters, the placement of the signal bands in the Doppler spectrum being determined according to the phase ramp applied to each transmitter, the waveforms being generated so as to leave a portion of the Doppler spectrum between two signal bands unoccupied; c) identifying the transmitter corresponding to each signal band, on the basis of the Range-Doppler representation of the echoes of the transmitted waveforms.

Description

technical field [0001] The field of the invention is MIMO ("Multiple Input Multiple Output") radars with DDMA (Doppler Diversity Multiple Access) waveforms. The present invention is particularly suitable for millimeter wave radars, especially radars operating in the W-band (frequency between 75 GHz and 110 GHz). Without limitation, the present invention may be applied to airborne radars, in particular for landing assistance. Background technique [0002] MIMO radars enable, in a number of applications (especially airborne radars), to improve the detection performance of radars, in particular by providing better angular resolution and better Doppler resolution. A MIMO radar consists of multiple receivers and multiple transmitters. MIMO radars are generally divided into two categories: multistatic MIMO radars and coherent MIMO radars. In a multistatic MIMO radar, not all transmitters and / or receivers are located in the same area or on the same carrier. In coherent MIMO rad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88
CPCG01S13/88G01S13/913G01S13/006G01S13/878G01S7/2883G01S7/288G01S13/582
Inventor R·科特隆P·科尔尼克Y·韦拉克
Owner THALES SA