DAC-based radar digital T/R component transmission waveform generation method

A technology for transmitting waveforms and generating methods, which is applied in the field of phased array radar digital wave generation, can solve the problems of slow frequency conversion speed and inaccurate partial frequency points, and achieve wide bandwidth, fast frequency switching speed, and accurate frequency points Effect

Active Publication Date: 2020-01-03
JINGZHOU NANHU MACHINERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Second, part of the frequency points generated by the digital-to-analog converter DAC itself has a shift of about 3 Hz, and some of the frequency points generated by itself are inaccurate;
[0005]

Method used

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  • DAC-based radar digital T/R component transmission waveform generation method
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  • DAC-based radar digital T/R component transmission waveform generation method

Examples

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Example Embodiment

[0031] (See Figure 1~3 ), a DAC-based radar digital T / R component emission waveform generation method. The hardware includes a debugging computer, a monitoring computer, a monitoring subsystem, a T / R component, and a frequency source. The debugging computer is a separate computer that includes a computer hardware platform, Display, keyboard, mouse, USB download line, operating system selects WIN7 version, installation program includes NIOSⅡ 12.1, QuartusⅡ 12.1, Matlab2014; monitoring computer is desktop computer, which includes human-computer interaction monitoring interface; monitoring subsystem includes communication interface board , Optical signal conversion board; T / R components include T / R component control boards; the hardware of the communication interface board includes field programmable gate array FPGA, serial memory EPCS, crystal oscillator, optical transceiver module, network communication module, serial communication The software includes a communication processin...

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Abstract

The invention relates to a DAC-based radar digital T/R component transmission waveform generation method, and belongs to the technical field of phased array radar digital wave generation. The DAC-based radar digital T/R component transmission waveform generation method comprises six steps, and a baseband carrier waveform is added on the basis of a digital waveform that is directly generated by adigital-to-analog converter DAC to effectively widens the bandwidth of a digital signal; an additional frequency point generated by NCO in a field-programmable gate array FPGA + a stable frequency point in the vicinity of a required frequency point and generated by the digital-to-analog converter DAC are imported to ensure the accuracy of all frequency points in a radar transmission bandwidth, andmeanwhile, the radar frequency point switching rate is improved; the operation and implementation are simple and convenient, and a digital T/R component can generate transmission waveforms with accurate frequency points, high frequency point and phase switching speed, diverse waveforms, stable phase and large bandwidth. The problems that the digital signal bandwidth of the transmission waveform is relatively wide, a part of frequency points in the transmission bandwidth is not accurate, and that the frequency conversion speed is low caused by the own characteristic defects of the digital-to-analog converter DAC are solved.

Description

technical field [0001] The invention relates to a method for generating a transmitting waveform of a radar digital T / R component based on a DAC, and belongs to the technical field of phased array radar digital wave generation. Background technique [0002] In phased array radar, more and more digital T / R components use the digital-to-analog converter DAC to generate multi-frequency point transmission waveforms. The transmission waveform of the digital-to-analog converter DAC is generated by the control of the control chip FPGA through the DAC chip. The working mode, frequency point, phase and bandwidth control of the digital T / R component are carried out through the DAC chip receiving the control command of the control chip FPGA. The communication mode is generally SPI communication mode. In addition, the output frequency point, waveform, phase and bandwidth are also It can be directly controlled by the control chip FPGA; however, there are some disadvantages in using the di...

Claims

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Application Information

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IPC IPC(8): G01S13/02G01S7/282
CPCG01S7/282G01S13/02G01S2013/0245
Inventor 智东杰陈婷贺亚军董荣
Owner JINGZHOU NANHU MACHINERY CO LTD
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