CN103716212A - DOA (direction of arrival) estimation digital circuit based on Ethernet bus - Google Patents
DOA (direction of arrival) estimation digital circuit based on Ethernet bus Download PDFInfo
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- CN103716212A CN103716212A CN201410030185.0A CN201410030185A CN103716212A CN 103716212 A CN103716212 A CN 103716212A CN 201410030185 A CN201410030185 A CN 201410030185A CN 103716212 A CN103716212 A CN 103716212A
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Abstract
The invention discloses a DOA (direction of arrival) estimation digital circuit based on an Ethernet bus. The DOA estimation digital circuit comprises a central processing unit, an analog-to-digital converter, a field programmable gate array and an Ethernet interface, wherein the central processing unit is connected with the Ethernet bus by virtue of the Ethernet interface and is connected with the analog-to-digital converter by virtue of the field programmable gate array. The DOA estimation digital circuit is high in universality and high in transmission speed rate.
Description
Technical field
The present invention relates to a kind of DOA (Direction of arrival, direction of arrival) estimative figure circuit, specifically a kind of DOA estimative figure circuit based on industry ethernet.
Background technology
In some DOA estimating circuits in the past, often adopt DSP (Digital Signal Processing, Digital Signal Processing) chip operation DOA algorithm for estimating software, be difficult to load dynamically, neatly various DOA estimation routines.Outbound data is seldom used high-speed bus alternately in addition, causes data interaction slower, and processing delay is larger, and real-time is poor.
Summary of the invention
Goal of the invention: the problem and shortage existing for above-mentioned prior art, the object of this invention is to provide a kind of versatility better, the DOA estimative figure circuit based on industry ethernet that transmission rate is high.
Technical scheme: for achieving the above object, the technical solution used in the present invention is a kind of DOA estimative figure circuit based on industry ethernet, comprise central processing unit, analog to digital converter, field programmable gate array and Ethernet interface, described central processing unit connects industry ethernet by Ethernet interface, and described central processing unit is by field programmable gate array connection mode number converter.
Further, described analog to digital converter has a plurality of, respectively the radiofrequency signal receiving in respective antenna array element is sampled, and the digital signal obtaining after sampling is delivered in field programmable gate array, and in programmable gate array, realize DOA estimation processing at the scene.
Further, described field programmable gate array is processed described digital signal by the DOA algorithm for estimating in central processor in service.
Further, described central processing unit and field programmable gate array adopt SCA software frame.
Further, described SCA software frame comprises operating environment and CORBA middleware.
Further, described operating environment comprises the real-time oss plate level support package of unifying, and described core frame is described definition, target and the operation of interface.
Further, described central processing unit adopts real time operating system, and uses CORBA middleware as the flexible bus between each waveform components; By described CORBA middleware, central processing unit moves each waveform components, and various DOA algorithm for estimating are loaded in field programmable gate array.
Further, described waveform components comprises interface and data transaction assembly, algorithm selection and charging assembly, DOA algorithm for estimating assembly and management and control assembly.
Further, described management and control assembly are estimated kind according to obtain DOA from industry ethernet, from DOA algorithm for estimating assembly, select corresponding DOA algorithm for estimating, then select with charging assembly, these DOA algorithm for estimating to be loaded in field programmable gate array and to be moved by algorithm.
Further, described interface and data transaction assembly are processed for the data of analog to digital converter conversion are delivered to field programmable gate array, and DOA is estimated to process the data that obtain and by CORBA middleware, by field programmable gate array, deliver to central processing unit, finally deliver to Ethernet interface.
Beneficial effect: DOA estimative figure circuit of the present invention is based on industry ethernet, and versatility is better, and transmission rate is high; Adopt SCA software architecture simultaneously, there is good code reusability and extensibility.The present invention can flexible Application arrive multiple direction-finding system and occasion.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of DOA estimative figure circuit of the present invention;
Fig. 2 is the basic block diagram of DOA estimative figure Circuits System software of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
The present invention has adopted SCA(Software Communication Architecture, software communication System Framework) framework, SCA framework passes through adaptability to changes flexibly, the quality of raising business, simplify the composition of hardware simultaneously, the way to manage of quick adaptation new standard is provided, simultaneously for different SCA waveform application provides transplantable platform, and by fully adopting COTS(Commercial-off-the-shelf, commercial ready-made article or technology) reduced development cost, by technology such as software reuses, reduced the construction cycle of new waveform.Simultaneously, the present invention adopts industry ethernet to carry out the transmission of external data information, and Ethernet is a kind of network of standard open formula, consisting of system compatibility and interoperability good, resource sharing capability is strong, can be easy to control on-the-spot data and the resource-sharing in information system; The transmission range of data is long, transmission rate is high; Low-cost, easily networking, with convenient connection of control interface of outer computer, server.Just because of there are many advantages, industry ethernet has obtained universal rapidly at home and abroad.
The present invention is a kind of DOA estimative figure circuit based on industry ethernet, can realize the DOA estimation processing that six tunnels receive signal.This circuit adopts industry ethernet, has the advantages that transmission rate is high, and the DOA that meets multi channel signals estimates requirement; Adopt SCA framework, can load flexibly various DOA algorithm for estimating, can improve DOA and estimate processing accuracy.
Digitlization conversion and DOA that the present invention can realize radiofrequency signal estimate.It is mainly by 1 CPU(Central Processing Unit, central processing unit) chip, 6 high-end A/D(Analog to digital converter, analog to digital converter) chip, 1 FPGA(Field-Programmable Gate Array, field programmable gate array) chip, 1 Ethernet chip and other peripheral circuit form.Cpu chip is selected MPC8614, and A/D chip is selected the AD976A of AD company, and fpga chip is selected the XC5VSX35-12 of Xilinx company, and Ethernet chip is selected DM9000A.This DOA estimative figure the electric circuit constitute schematic diagram as shown in Figure 1.
Wherein 6 A/D chips are sampled to the radiofrequency signal receiving in 6 bays respectively, the digital signal obtaining is delivered in fpga chip, and in fpga chip, realize DOA and estimate to process after sampling, and operation DOA estimates waveform components.
In module, cpu chip and fpga chip adopt SCA software frame, this SCA software frame is mainly by operating environment, CORBA(Common Object Request Broker Architecture, Common Object Request Broker Architecture) several parts such as middleware form.Operating environment comprises core frame (CF, Core Framework) and some basic softwares, as RTOS (Real-time operating system, real time operating system), BSP (Board Support Package, plate level support package) etc.Core frame (CF) is described definition, target and the operation of interface, for software application development person provides the abstract of a low layer software and hardware.The use of CORBA middleware can improve extensibility and the portability of system greatly, makes component software have good replaceability.
CPU adopts RTOS real time operating system, uses CORBA middleware as the flexible bus between each waveform components (also claiming " CORBA bus ") in system.The actual conditions of estimating waveform in conjunction with DOA, waveform components can be divided into following 4 waveform application assemblies: interface and data transaction assembly, algorithm selection and charging assembly, DOA algorithm for estimating assembly, management and control assembly.The basic structure of DOA estimative figure Circuits System software as shown in Figure 2.By CORBA bus, the CPU in DOA estimative figure circuit can move any assembly, and various DOA algorithm for estimating are loaded in fpga chip.Wherein management will obtain DOA estimation kind according to industry ethernet with control assembly, from DOA algorithm for estimating assembly, select corresponding MUSIC(Multiple signal classification, multiple signal classification), Cyclic MUSIC(Cyclic Multiple signal classification, circulation multiple signal classification) the high-resolution DOA algorithm for estimating such as, then select with charging assembly, these DOA algorithm for estimating to be loaded in fpga chip and to be moved by algorithm.Interface and data transaction assembly are responsible for the data of A/D chip conversion to deliver in FPGA and process, and DOA are estimated to process the data that obtain and by CORBA bus, by FPGA, deliver to CPU, finally deliver to Ethernet chip.
Claims (10)
1. the DOA estimative figure circuit based on industry ethernet, it is characterized in that: comprise central processing unit, analog to digital converter, field programmable gate array and Ethernet interface, described central processing unit connects industry ethernet by Ethernet interface, and described central processing unit is by field programmable gate array connection mode number converter.
2. the DOA estimative figure circuit based on industry ethernet according to claim 1, it is characterized in that: described analog to digital converter has a plurality of, respectively the radiofrequency signal receiving in respective antenna array element is sampled, and the digital signal obtaining after sampling is delivered in field programmable gate array, and in programmable gate array, realize DOA estimation processing at the scene.
3. the DOA estimative figure circuit based on industry ethernet according to claim 2, is characterized in that: described field programmable gate array is processed described digital signal by the DOA algorithm for estimating in central processor in service.
4. the DOA estimative figure circuit based on industry ethernet according to claim 1, is characterized in that: described central processing unit and field programmable gate array adopt SCA software frame.
5. the DOA estimative figure circuit based on industry ethernet according to claim 4, is characterized in that: described SCA software frame comprises operating environment and CORBA middleware.
6. the DOA estimative figure circuit based on industry ethernet according to claim 5, is characterized in that: described operating environment comprises the real-time oss plate level support package of unifying, and described core frame is described definition, target and the operation of interface.
7. the DOA estimative figure circuit based on industry ethernet according to claim 4, is characterized in that: described central processing unit adopts real time operating system, and uses CORBA middleware as the flexible bus between each waveform components; By described CORBA middleware, central processing unit moves each waveform components, and various DOA algorithm for estimating are loaded in field programmable gate array.
8. the DOA estimative figure circuit based on industry ethernet according to claim 7, is characterized in that: described waveform components comprises interface and data transaction assembly, algorithm selection and charging assembly, DOA algorithm for estimating assembly and management and control assembly.
9. the DOA estimative figure circuit based on industry ethernet according to claim 8, it is characterized in that: described management and control assembly are estimated kind according to obtain DOA from industry ethernet, from DOA algorithm for estimating assembly, select corresponding DOA algorithm for estimating, then select with charging assembly, these DOA algorithm for estimating to be loaded in field programmable gate array and to be moved by algorithm.
10. the DOA estimative figure circuit based on industry ethernet according to claim 8, it is characterized in that: described interface and data transaction assembly are processed for the data of analog to digital converter conversion are delivered to field programmable gate array, and DOA is estimated to process the data that obtain and by CORBA middleware, by field programmable gate array, deliver to central processing unit, finally deliver to Ethernet interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410030185.0A CN103716212A (en) | 2014-01-23 | 2014-01-23 | DOA (direction of arrival) estimation digital circuit based on Ethernet bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852750A (en) * | 2015-04-20 | 2015-08-19 | 国家无线电监测中心陕西监测站 | Data stream processing circuit used for short wave positioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852750A (en) * | 2015-04-20 | 2015-08-19 | 国家无线电监测中心陕西监测站 | Data stream processing circuit used for short wave positioning |
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Application publication date: 20140409 |