WO2023123296A1

WO2023123296A1 - Novel multi-antenna array system for rapid data collection based on application of lsar and csar

Info

Publication number: WO2023123296A1
Application number: PCT/CN2021/143468
Authority: WO
Inventors: 陈健毅
Original assignee: 深圳航天科技创新研究院
Priority date: 2021-12-28
Filing date: 2021-12-31
Publication date: 2023-07-06
Also published as: CN114355345A

Abstract

A novel multi-antenna array system for rapid data collection based on the application of LSAR and CSAR, comprising a multi-input multi-output antenna array, a switching circuit, a transceiver, and a processor which are connected in sequence. The multi-input multi-output antenna array comprises m transmitting antennas and n receiving antennas so as to form different antenna array combinations. The switching circuit comprises a microwave transmitter switch and a microwave receiver switch to switch an electromagnetic wave channel transmitted through the transmitting antennas or the receiving antennas, wherein the microwave transmitter switch and the microwave receiver switch are synchronized. The transceiver performs power amplification on electromagnetic waves transmitted by the transmitting antennas, performs low-noise amplification and frequency mixing on the electromagnetic waves transmitted by the receiving antennas, completes intermediate frequency amplification and I/Q positive electrode channel receiving, obtains corresponding echo data, and feeds back the echo data to the processor. Then, the processor generates a corresponding control instruction to control ON/OFF of the switching circuit, and processes electromagnetic wave data received and transmitted by the transceiver. The present invention improves the efficiency of data collection and measurement in LSAR or CSAR.

Description

Novel multi-antenna array system based on fast data collection for LSAR and CSAR applications

technical field

The invention relates to the technical field of antenna arrays, in particular to a novel multi-antenna array system based on LSAR and CSAR for fast data collection.

Background technique

Antenna array design in wireless communication systems is an important factor in delivering high performance in 3D imaging, localization and position determination. A multiple-input multiple-output (MIMO) based synthetic aperture antenna array employs multiple antennas to transmit and receive orthogonal waveforms. Such synthetic aperture antenna arrays and beamforming can be applied to radar and lidar image processing, imaging for industrial automation, position determination, positioning, robot vision, positioning and position determination for communication systems, and for mobile devices and Antenna array design for communication systems. Compared with the traditional two-dimensional radar image of the target, the three-dimensional radar image of the target can provide the spatial three-dimensional position and scattering intensity information of the local scattering center of the complex target, making the data more complete.

For linear synthetic aperture radar LSAR or circular synthetic aperture radar CSAR, the traditional method is to physically move the antenna over the aperture length. The conventional data collection applied to microwave imaging is shown in Figure 1. In this method, a set of transmitting and The receiving antenna and sensor will move along the measurement path. However, this method requires a certain amount of time to physically move the transceiver and stabilize the antenna position before measurement, and requires more time during data collection.

Contents of the invention

The main purpose of the present invention is to propose a new multi-antenna array system based on LSAR and CSAR applications for fast data collection, aiming at improving the efficiency of data collection and measurement in linear synthetic aperture radar LSAR or circular synthetic aperture radar CSAR.

In order to achieve the above object, the novel multi-antenna array system based on LSAR and CSAR application fast data collection proposed by the present invention includes that the novel multi-antenna array system based on LSAR and CSAR application fast data collection includes sequentially connected multiple input multiple output antenna arrays, switching circuits, transceivers and processors;

The multiple-input multiple-output antenna array includes m transmitting antennas and n receiving antennas to form different antenna array combinations;

The switch circuit includes a microwave transmitter switch and a microwave receiver switch, which are used to connect each antenna in the multiple-input multiple-output antenna array to form different antenna combinations, and switch the electromagnetic wave channel propagated by the transmitting antenna or the receiving antenna; wherein, The microwave transmitter switch is synchronized with the microwave receiver switch;

The transceiver is configured to amplify the power of electromagnetic waves transmitted by the transmitting antenna in the MIMO antenna array, and perform low-noise amplification and frequency mixing on the electromagnetic waves transmitted by the receiving antenna in the MIMO antenna array, And complete intermediate frequency amplification and I/Q positive channel reception, obtain corresponding echo data, and feed back to the processor;

The processor is configured to generate corresponding control instructions to control the on/off of the switch circuit, and process the electromagnetic wave data sent and received by the transceiver.

Preferably, each of the transmitting antennas and each of the receiving antennas in the multiple-input multiple-output antenna array are arranged at intervals, or each of the transmitting antennas is evenly arranged side by side, and each of the receiving antennas is evenly arranged side by side.

Preferably, the different antenna array combinations are arranged in specific geometric shapes.

Preferably, in the LSAR, each antenna is arranged in a line to form an antenna combination; in the CSAR, each antenna is arranged in a circle to form an antenna combination.

Preferably, the novel multi-antenna array system for fast data collection based on LSAR and CSAR applications also includes a display module connected to the processor;

The display module is used to display the electromagnetic wave data processed by the processor.

Preferably, m in the multiple-input multiple-output antenna array is an integer greater than or equal to 2, and n is an integer greater than or equal to 2.

Preferably, the processor is FPGA, ARM microcontroller or CPU.

Preferably, the novel multi-antenna array system based on LSAR and CSAR application fast data collection also includes a power supply system;

The power supply system is used to supply power to the switch circuit, the transceiver and the processor.

Preferably, the power supply system includes a storage battery module, a solar power module and a UPS power module.

Preferably, the solar power module at least includes a solar panel, a controller, a storage battery module and an inverter module.

The beneficial effects of the present invention are that the novel multi-antenna array system based on LSAR and CSAR application fast data collection in the technical solution of the present invention has the multi-input multi-output antenna array, switch circuit, transceiver and processor connected sequentially; specifically, The multiple-input multiple-output antenna array includes m transmitting antennas and n receiving antennas to form different antenna array combinations; the switch circuit includes a microwave transmitter switch and a microwave receiver switch for connecting each antenna in the multiple-input multiple-output antenna array Constitute different antenna combinations, and switch the electromagnetic wave channel transmitted by the transmitting antenna or receiving antenna; the transceiver amplifies the power of the electromagnetic wave transmitted by the transmitting antenna in the MIMO antenna array, and transmits the electromagnetic wave transmitted by the receiving antenna in the MIMO antenna array. Low-noise amplification and frequency mixing of electromagnetic waves, and completion of intermediate frequency amplification and I/Q positive channel reception, acquisition of corresponding echo data, and feedback to the processor; then the processor generates corresponding control commands to control the opening/closing of the switch circuit , and process the electromagnetic wave data sent and received by the transceiver. In this scheme, the switch of the microwave transmitter and the switch of the microwave receiver are synchronized to make the scanning speed faster, and multiple antennas of the multi-input and multi-output antenna array are electrically switched through the microwave switch, which can realize fast data collection for low detectable targets; It also improves the efficiency of data collection for distance measurements compared to physically moving the antenna over the aperture length.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a schematic structural diagram of an embodiment of conventional data collection in the related art;

Fig. 2 is the module structural representation of an embodiment of antenna array collection data in the novel multi-antenna array system of the present invention based on LSAR and CSAR application fast data collection;

Fig. 3 is the module structural representation of an embodiment of antenna array collection data in the novel multi-antenna array system of the present invention based on LSAR and CSAR application rapid data collection;

FIG. 4 is a schematic diagram of a module structure of an embodiment of a generalized switch array in a novel multi-antenna array system based on LSAR and CSAR for fast data collection according to the present invention.

The realization of the purpose of the present invention, functional characteristics and possible points will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention proposes a novel multi-antenna array system based on LSAR and CSAR applications for fast data collection.

In order to solve the above problems, in an embodiment of the present invention, as shown in FIG. 2 , the novel multi-antenna array system based on LSAR and CSAR application fast data collection includes a sequentially connected MIMO antenna array 40, a switch circuit 30. Transceiver 20 and processor 10;

The MIMO antenna array 40 includes m transmitting antennas and n receiving antennas to form different antenna array combinations;

The switch circuit 30 includes a microwave transmitter switch and a microwave receiver switch, which are used to connect each antenna in the MIMO antenna array 40 to form different antenna combinations, and switch the electromagnetic wave channel propagated by the transmitting antenna or the receiving antenna; Wherein, the switch of the microwave transmitter is synchronized with the switch of the microwave receiver;

The transceiver 20 is configured to amplify the power of the electromagnetic waves transmitted by the transmitting antennas in the MIMO antenna array 40, and perform low-noise amplification and summing of the electromagnetic waves transmitted by the receiving antennas in the MIMO antenna array 40. Mixing, and completing intermediate frequency amplification and I/Q positive channel reception, obtaining corresponding echo data, and feeding back to the processor 10;

The processor 10 is configured to generate corresponding control instructions to control the on/off of the switch circuit 30 , and process the electromagnetic wave data sent and received by the transceiver 20 .

In this embodiment, as shown in FIG. 3 and FIG. 4 , each of the transmitting antennas and each of the receiving antennas in the MIMO antenna array 40 are arranged at intervals, or each of the transmitting antennas is evenly arranged side by side, The receiving antennas are uniformly arranged side by side. The different antenna array combinations are arranged in a specific geometric shape. Further, in the LSAR, each antenna is arranged in a straight line to form an antenna combination; in the CSAR, each antenna is arranged in a circle to form an antenna combination.

It should be noted that multiple-input multiple-output (MIMO, Multiple-Input Multiple-Output) radar is a radar that uses multiple transmit antenna elements and receive antenna elements to realize transmit and receive diversity waveforms, and then perform centralized processing. A small number of physical array elements can be used to equivalent a large number of virtual array elements to synthesize a large virtual aperture, shorten data acquisition time, and improve measurement efficiency. The MIMO radar array avoids the mechanical transmission structure, has high efficiency and fast imaging.

In the above embodiment, the novel multi-antenna array system for fast data collection based on LSAR and CSAR further includes a display module 50 connected to the processor 10 for displaying the electromagnetic wave data processed by the processor 10 . It can be understood that the display module 50 can be, but not limited to, an LCD screen, an LED screen, an OLED screen, a mini LED screen, and the like. The processor 10 can be, but not limited to, FPGA, ARM microcontroller or CPU; m in the MIMO antenna array 40 is an integer greater than or equal to 2, and n is an integer greater than or equal to 2, that is, m can be 2 , 3, 4, etc., n can be 2, 3, 4, etc., set according to the actual application scenario.

In the technical scheme of the present invention, the novel multi-antenna array system based on LSAR and CSAR application fast data collection has a multi-input multi-output antenna array 40, a switch circuit 30, a transceiver 20 and a processor 10 connected sequentially; specifically, multi-input multi- The output antenna array 40 includes m transmitting antennas and n receiving antennas to form different antenna array combinations; the switch circuit 30 includes a microwave transmitter switch and a microwave receiver switch for connecting each antenna in the MIMO antenna array 40 Constitute different antenna combinations, and switch the electromagnetic wave channel propagated by the transmitting antenna or the receiving antenna; Receive the electromagnetic waves transmitted by the antenna for low-noise amplification and frequency mixing, complete intermediate frequency amplification and I/Q positive channel reception, obtain corresponding echo data, and feed back to processor 10; then processor 10 generates corresponding control commands to control the switch The circuit 30 is turned on/off, and the electromagnetic wave data sent and received by the transceiver 20 is processed. In this scheme, the switch of the microwave transmitter and the switch of the microwave receiver are synchronized, so that the scanning speed is faster, and multiple antennas of the multi-input multi-output antenna array 40 are electrically switched through the microwave switch, which can realize fast data collection for low detectable targets; at the same time It also improves the efficiency of data collection for distance measurements compared to physically moving the antenna over the aperture length.

In one embodiment, as shown in FIG. 2, the novel multi-antenna array system based on LSAR and CSAR application fast data collection also includes a power supply system 60;

The power supply system 60 is used to supply power to the switch circuit 30 , the transceiver 20 and the processor 10 .

In this embodiment, the power supply system 60 includes a battery module, a solar power module and a UPS power module. It should be noted that the solar power module at least includes a solar panel, a controller, a storage battery module and an inverter module.

Specifically, the solar power module is composed of a solar battery combination board and a square bracket. Because the voltage of a single solar battery is generally relatively low, it is usually necessary to connect them in series and parallel to form a solar panel with practical value as an application unit. Then according to the power supply requirements, the solar power module is composed of multiple application units connected in series and parallel. Solar panels (certain semiconductor materials, currently mainly polysilicon, monocrystalline silicon and amorphous silicon, assembled after a certain process) are the most important part of the photovoltaic power generation system, and are also the most valuable part of the photovoltaic power generation system. When the solar panel is illuminated, the battery absorbs light energy, and the accumulation of opposite-sign charges occurs at both ends of the battery, that is, a "photoelectric voltage" is generated, which is the "photoelectric effect". Under the action of the photoelectric effect, an electromotive force is generated at both ends of the solar cell to convert light energy into electrical energy. It is an energy conversion device. The function of the battery module is to store the electric energy emitted by the solar power module when it is illuminated and to supply power to the load at any time. In the photovoltaic power generation system, the battery module may not be added. A device that regulates and controls electrical energy. The inverter is a device that converts the direct current provided by the solar power module and the battery into alternating current, and is a key component of the photovoltaic power generation system. Since solar cells and batteries are DC power sources, an inverter is essential when the load is an AC load. According to the operation mode, inverters can be divided into independent operation inverters and grid-connected inverters. Stand-alone inverters are used in stand-alone solar cell power generation systems to supply power to independent loads. Grid-connected inverters are used in grid-connected solar cell power generation systems. This article mainly introduces solar photovoltaic grid-connected power generation systems. Grid-connected inverters are composed of power switching devices such as IGBTs. Turn off, make the output voltage polarity alternately positive and negative, and convert DC input to AC output. Inverters can be divided into square wave inverters and sine wave inverters according to the output waveform. The square wave inverter circuit is simple, the cost is low, but the harmonic component is large, and it is generally used in systems with a few hundred watts or less and low harmonic requirements. Sine wave inverters are expensive, but can be applied to various loads.

It should be noted that the UPS power supply module in the above solution can prevent the power supply system 60 from being powered off, resulting in the failure of the switch circuit 30, the transceiver 20 and the processor 10 in the new multi-antenna array system based on LSAR and CSAR applications for fast data collection. .

The above descriptions are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect Application in other related technical fields is included in the patent protection scope of the present invention.

Claims

The new multi-antenna array system based on LSAR and CSAR application fast data collection is characterized in that, the novel multi-antenna array system based on LSAR and CSAR application fast data collection includes sequentially connected multi-input multi-output antenna arrays, switch circuits, transceivers and processors;

The multiple-input multiple-output antenna array includes m transmitting antennas and n receiving antennas to form different antenna array combinations;

The switch circuit includes a microwave transmitter switch and a microwave receiver switch, which are used to connect each antenna in the multiple-input multiple-output antenna array to form different antenna combinations, and switch the electromagnetic wave channel propagated by the transmitting antenna or the receiving antenna; wherein, The microwave transmitter switch is synchronized with the microwave receiver switch;

The transceiver is configured to amplify the power of electromagnetic waves transmitted by the transmitting antenna in the MIMO antenna array, and perform low-noise amplification and frequency mixing on the electromagnetic waves transmitted by the receiving antenna in the MIMO antenna array, And complete intermediate frequency amplification and I/Q positive channel reception, obtain corresponding echo data, and feed back to the processor;

The processor is configured to generate corresponding control instructions to control the on/off of the switch circuit, and process the electromagnetic wave data sent and received by the transceiver.
The novel multi-antenna array system based on LSAR and CSAR application fast data collection according to claim 1, characterized in that, each of the transmitting antennas and each of the receiving antennas in the multiple-input and multiple-output antenna array are arranged at intervals , or each of the transmitting antennas is evenly arranged side by side, and each of the receiving antennas is evenly arranged side by side.
The novel multi-antenna array system for fast data collection based on LSAR and CSAR according to claim 2, wherein the different antenna array combinations are arranged in specific geometric shapes.
The novel multi-antenna array system for fast data collection based on LSAR and CSAR according to claim 3, wherein, in the LSAR, each antenna is arranged in a straight line as an antenna combination; in the CSAR, each antenna is in the form of an antenna combination Circumferentially arranged as an antenna combination.
According to the novel multi-antenna array system based on LSAR and CSAR application fast data collection according to any one of claims 1-4, it is characterized in that, the novel multi-antenna array system based on LSAR and CSAR application fast data collection also includes and a display module connected to the processor;

The display module is used to display the electromagnetic wave data processed by the processor.
The novel multi-antenna array system based on LSAR and CSAR application fast data collection according to any one of claims 1-4, wherein m is an integer greater than or equal to 2 in the multi-input multi-output antenna array, and n is an integer greater than or equal to 2.
The novel multi-antenna array system for fast data collection based on LSAR and CSAR applications according to any one of claims 1-4, wherein the processor is an FPGA, an ARM microcontroller or a CPU.
The novel multi-antenna array system based on LSAR and CSAR application fast data collection according to claim 1, wherein the novel multi-antenna array system based on LSAR and CSAR application fast data collection also includes a power supply system;

The power supply system is used to supply power to the switch circuit, the transceiver and the processor.
The novel multi-antenna array system for fast data collection based on LSAR and CSAR according to claim 8, wherein the power supply system includes a storage battery module, a solar power module and a UPS power module.
The novel multi-antenna array system for fast data collection based on LSAR and CSAR according to claim 9, wherein the solar power module at least includes a solar panel, a controller, a storage battery module and an inverter module.