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Coherent radar wide pulse waveform generation method and device

A waveform generation, coherent radar technology, applied in radio wave measurement systems, instruments, electrical digital data processing, etc., can solve problems affecting signal processing and timing control, large storage capacity of wide pulse waveforms, and large on-chip resource consumption. , to solve the leading edge jitter, ensure waveform coherence, and ensure the effect of continuity

Active Publication Date: 2020-07-03
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, the large storage capacity of wide pulse waveforms leads to problems such as large on-chip resource occupation, insufficient logic resources, and tight timing, which affects signal processing and timing control, and timing instability occurs. Defects in the prior art provide a coherent radar wide pulse waveform generation method and device

Method used

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Embodiment 1

[0034] like figure 1 As shown, it is a schematic structural diagram of a coherent radar wide pulse waveform generation device provided by Embodiment 1 of the present invention, including: an interface module, an integration module 200 , a read / write state machine 300 and a radar timing state machine 400 .

[0035] The interface module includes a digital-to-analog conversion interface 110 and a PCI interface 120 .

[0036] The integrated module 200 includes: a front-stage FIFO (first-in-first-out queue) 210 , a rear-stage FIFO 220 , a DDR (Double Rate Synchronous Dynamic Random Access Memory) 230 , and a DDR MIG core 240 . In the integrated module 200, the input end of the front-stage FIFO 210 is connected to the PCI interface 120 for receiving the waveform data issued, and the output end of the front-stage FIFO 210 is connected to the read-write state machine 300, and the The waveform data is output to the read / write state machine 300 . The input end of the rear-stage FIFO 2...

Embodiment 2

[0047] like figure 1 As shown, the coherent radar wide pulse waveform generation method provided by Embodiment 1 of the present invention is specifically executed according to the following steps:

[0048] Firstly, in step S1, the front-stage FIFO 210 receives the delivered waveform data.

[0049] The waveform data received by the front-stage FIFO 210 in the present invention is generated through simulation according to the requirement of the radar transmission waveform. Therefore, the method of the present invention may also include: first generating waveform data through simulation, and saving it into a waveform file, and then sending the waveform data to the front-end FIFO 210 through the PCI interface 120 through the host computer software. The specific process can be as follows: after the host computer software sends the waveform data download command, the waveform data is transmitted to the PCI interface 120 through the PCI bus, and written into the front-stage FIFO 210...

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Abstract

The invention relates to a coherent radar wide pulse waveform generation method and device. The method comprises the following steps of receiving issued waveform data by a preceding-stage FIFO; storing the waveform data into a DDR (Double Data Rate) through a DDR MIG (Multiple Input Multiple Output) core by utilizing read-write control of the preceding-stage FIFO (First Input First Output); controlling the DDR MIG core to pre-read the waveform data from the DDR by using a back-stage FIFO programmable full signal; when an internal trigger signal generated according to a radar start instructionis detected, the post-stage FIFO outputting the waveform data to a digital-to-analog conversion interface to generate an analog signal so as to realize waveform output. The method is advantaged in that the method is for coherent radar wide pulse waveform generation, on-chip resources can be greatly released, application is flexible, and coherence and continuity of radar transmitted waveforms can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a method and device for generating a coherent radar wide pulse waveform. Background technique [0002] At present, the dynamic target scattering measurement system has the ability of target search, tracking and measurement, and can realize the tracking of moving targets and the acquisition of characteristic measurement data. The measurement system needs to have the ability to transmit coherent pulse waveforms, and there are many types of waveforms and large pulse widths. During the working process, the waveforms can be adaptively replaced in real time according to the target position information. According to the requirements, various waveforms need to be generated and stored in the cache, and the transmitting waveform address can be changed in real time according to the mode and parameter information during the working process to achieve the purpose of switching ...

Claims

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Application Information

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IPC IPC(8): G01S7/282G01S7/28G06F13/16
CPCG01S7/282G01S7/2806G06F13/1668
Inventor 刘胤凯冯孝斌沈小玲张云张达凯苗苗邵景星冯雨李熙民王晓
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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