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Universal ultra-wideband correction direction-finding method and system based on FPGA (Field Programmable Gate Array)

An ultra-wideband, source-correcting technology, applied in direction finders using radio waves, radio wave direction/deviation determination systems, monitoring/testing of radio wave directors, etc., and can solve problems such as inherent phase errors and influence of measurement results , to achieve the effect of simple design, low cost and high direction finding accuracy

Pending Publication Date: 2022-01-21
中国船舶重工集团公司第七二三研究所
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Problems solved by technology

The inherent phase error introduced by the inconsistency of the system channels will affect the measurement results

Method used

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  • Universal ultra-wideband correction direction-finding method and system based on FPGA (Field Programmable Gate Array)
  • Universal ultra-wideband correction direction-finding method and system based on FPGA (Field Programmable Gate Array)
  • Universal ultra-wideband correction direction-finding method and system based on FPGA (Field Programmable Gate Array)

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Embodiment Construction

[0015] Such as figure 1 As shown, a general-purpose ultra-wideband correction and direction-finding system based on FPGA includes a correction source, a host computer, an FPGA, a receiver, and a turntable; The correction signal is transmitted to the receiver; the receiver is set on the turntable, and the turntable is connected to the upper computer through a network cable, and the upper computer controls the orientation of the receiver by controlling the turntable; the receiver is used to transmit the received signal and the correction signal to the FPGA; as the main control chip of the system, the FPGA internally processes PDW information, performs data processing through the Microblaze soft core built in FPGA, performs automatic correction of multi-channel phase information, and generates a correction table based on frequency index; The phase relationship of the two receiving channels, calculate the azimuth angle of the target, communicate with the host computer, receive com...

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Abstract

The invention discloses a universal ultra-wideband correction direction-finding system and method based on an FPGA. PDW information is processed in the FPGA, inherent phase errors introduced by channel inconsistency are eliminated through a phase comparison technology, correction is carried out at a fixed frequency point, smoothing and interpolation processing are carried out, data are corrected and analyzed multiple times, an average value is calculated, and the correction accuracy is improved. On the basis of a single-bit receiver, the phase comparison correction direction-finding technology is adopted, the sensitivity is high, the instantaneous bandwidth is ultra-wide, and high direction-finding precision is achieved through low equipment quantity.

Description

technical field [0001] The invention belongs to the electronic information direction finding technology, in particular to an FPGA-based general ultra-wideband correction and direction finding method and system. Background technique [0002] In recent years, with the rapid development of communication, radar and electronic countermeasures, more and more new system radars have been applied, and the electromagnetic environment has become more and more dense and complex. The development of ultra-wideband, high sensitivity, large dynamic range and simultaneous arrival signal adaptability capable wideband digital receivers are urgently needed. [0003] At present, the main methods for measuring the incoming wave azimuth include the amplitude ratio system, the time difference system, the spatial spectrum system, and the interferometer system. The amplitude ratio system is based on the radio waves in progress, using the direction characteristics of the direction-finding antenna arr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14G01S3/023
Inventor 徐思远李宏圆李霄姚群马干军
Owner 中国船舶重工集团公司第七二三研究所
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