Digital processing module for short-wave two-dimension direction-of-arrival estimation

A technology of direction estimation and digital processing, which is applied to the direction/bias determination system of radio waves, direction finders using radio waves, etc., and can solve problems such as inconvenient software transplantation.

Active Publication Date: 2014-08-20
PANDA ELECTRONICS GROUP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the past, digital processing modules often used the circuit combination of DSP+CPLD or DSP+FPGA. There are many types of DSP chips, and the languages ​​of each chip are also different, which brings a lot of inconvenience to software transplantation.

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  • Digital processing module for short-wave two-dimension direction-of-arrival estimation
  • Digital processing module for short-wave two-dimension direction-of-arrival estimation
  • Digital processing module for short-wave two-dimension direction-of-arrival estimation

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Embodiment Construction

[0058] The following structural drawings further illustrate the present invention.

[0059] like figure 1 As shown, the shortwave two-dimensional direction of arrival estimation digital processing module can receive and process 10 shortwave channel intermediate frequency signals, and uses OMAP3530 as the control chip in the module. The chip contains ARM Cortex-A8 core and TMS320C64x series DSP processor. The software is compatible with ARM9 and C64x, which is conducive to platform porting, and uses TI's SmartReflex technology to achieve low power consumption. The FPGA adopts Cyclone II FPGA from Altera Company, which has fast operation speed. The A / D uses 10 pieces of AD9244, and 3 pieces of down-conversion chip HSP50216 are used. The FPGA chip is used for logic control processing and two-dimensional wave direction estimation calculation, and the CPCI interface chip is selected. PCI9054.

[0060] The OMAP chip reads in external control commands through the CPCI bus, and at th...

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Abstract

The invention provides a digital processing module for short-wave two-dimension direction-of-arrival estimation. The digital processing module includes ten A / D conversion chips, three digital down-conversion chips, an FPGA chip and an OMAP chip. The A / D conversion chips convert acquired analog signals into digital signals and send the converted digital signals to the three digital down-conversion chips. The three digital down-conversion chips carry out digital down-conversion processing on the received digital signals and send processed 10 paths of frequency conversion signals to the FPGA chip. The FPGA chip carries out filtering and a two-dimension direction-of-arrival estimation operation on the received 10 paths of frequency conversion signals and sends pitch angle information of two-dimension arrival, obtained through the estimation, to the OMAP chip. The OMAP chip converts the pitch angle and azimuth angle data of the two-dimension arrival, sent by an FPGA high-speed serial port into parallel bus data and sends the parallel bus data to a CPCI interface chip. The digital processing module adopts the OMAP chip and the FPGA chip, which are higher in processing capability, to realize two-dimension direction-of-arrival estimation on short-wave signals and is excellent in software transplantability; and the digital processing module adopts a CPCI bus and is high in universality.

Description

technical field [0001] The invention belongs to the design of electronic circuits, in particular to a short-wave two-dimensional direction-of-arrival estimation digital processing module. Background technique [0002] As the core technology in the mobile communication system, the smart antenna can effectively resist the interference signal and improve the communication quality and reliability. Due to the time-varying fading and many interference signals in short-wave communication, the receiving signal-to-noise ratio is often low and the communication effect is poor. Applying smart antenna technology to short-wave communication can improve the communication effect. Direction of arrival estimation is a key technology in smart antennas. By judging the incoming wave direction of the signal, it automatically adjusts the transmitting and receiving pattern, so that it forms a null in the interference direction, cancels the interference signal, and forms the main beam in the direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 陈立明俞春华
Owner PANDA ELECTRONICS GROUP
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