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Method and device for controlling output data bandwidth of beam former based on single-FPGA (Field Programmable Gate Array)

A bandwidth control and output data technology, applied in the field of output data bandwidth control of a single FPGA-based beamformer, to achieve the effect of excellent real-time performance

Active Publication Date: 2011-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, FPGA-based digital beamformers also face the bandwidth control problem mentioned above

Method used

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  • Method and device for controlling output data bandwidth of beam former based on single-FPGA (Field Programmable Gate Array)
  • Method and device for controlling output data bandwidth of beam former based on single-FPGA (Field Programmable Gate Array)
  • Method and device for controlling output data bandwidth of beam former based on single-FPGA (Field Programmable Gate Array)

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited thereto.

[0043] Such as figure 1 As shown, a single FPGA-based digital beamformer output data bandwidth control device, including:

[0044]The total amount of allowed storage calculation unit 110 receives the beam coordinate data currently output by the beamformer, and calculates the beams that are allowed to be stored in the current coordinate position and the space before the coordinate position in the beamforming result of this frame according to the coordinate information The total amount of result data is formed; in this embodiment, the current coordinate position and the space before the coordinate position refer to: the physical distance between the detector and the detection space does not exceed the coordinate position;

[0045] The threshold comparison unit 120 receives the beam intensity value data ...

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Abstract

The invention discloses a method and a device for controlling output data bandwidth of a beam former based on single-FPGA (Field Programmable Gate Array). The device comprises an allowably-memorized total quantity, a threshold comparing unit, a practically-memorized total quantity counting unit, a memorized total quantity comparing unit, a threshold adjusting unit and a memory write-in control unit. The method comprises the steps of an allowably-memorized total quantity calculating step, a threshold comparing step, a practically-memorized total quantity counting step, a memorized total quantity comparing step, a threshold adjusting step and a memory write-in controlling step. By adopting the method and the device, the currently used threshold can be dynamically adjusted according to the change of the detected scene, the aim of effectively dispensing the memory resource in the whole detecting scope can be realized, the bandwidth of the output data of the beamformer can be controlled within the system processed bandwidth; simultaneously the beamformer and the digital beamformer at the front end can work synchronously so that the real-time adjustment of the threshold can be improved and simultaneously the requirement on large-capacity high-speed cache can be avoided.

Description

technical field [0001] The invention relates to the fields of FPGA technology and digital beamforming calculations, in particular to a single FPGA-based beamformer output data bandwidth control method and device. Background technique [0002] Beamforming calculation is a commonly used signal processing method in the field of signal processing, and has a wide range of applications in sonar signal processing, radar signal processing, ultrasonic detection and other fields. In these applications, if the detection or scanning range is large and the real-time requirements are high, the total data volume of the beamforming results corresponding to each spatial position will reach an extremely large scale after beamforming calculations. Exceed the subsequent data transmission and analysis capabilities of the system. Therefore, in practical applications, it is often necessary to select an appropriate threshold to filter the output results of the beamformer, and only retain a part of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/52
Inventor 陈耀武袁龙涛韩业强
Owner ZHEJIANG UNIV