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Wireless triggering system and method based on FPGA

A wireless and antenna technology, which is applied in the field of FPGA-based wireless trigger system, can solve the problems of timing control and weak parallel processing ability, and achieve the effects of less noise interference, strong environmental adaptability, and shortened delay

Active Publication Date: 2019-03-15
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing wireless trigger control system, single-chip microcomputer, DSP, etc. are often used as the control unit of the remote control system, but due to its own working characteristics, it is often weaker than FPGA in terms of precise timing control and parallel processing capabilities.

Method used

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  • Wireless triggering system and method based on FPGA
  • Wireless triggering system and method based on FPGA

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specific Embodiment 1

[0033] The hardware structure of OFDM-based wireless trigger system is as follows: figure 1 As shown, it mainly includes FPGA main control module, ultra-low clock jitter module, high-speed ADC and DAC mixed-signal front-end, high-speed ADC driver, high-speed DAC buffer, RF signal transceiver and power supply module. The high-speed ADC and DAC mixed-signal front-end includes D / A digital-to-analog conversion module and A / D analog-to-digital conversion module, the ultra-low clock jitter module provides clock for high-speed ADC and DAC mixed-signal front-end, and the power supply module supplies power to all other modules.

[0034] Assuming that the 16bit code is sent, it is serially converted into 4bit*4 parallel codes. After BPSK mapping, the four parallel codes are respectively modulated with 4M, 8M, 12M, and 16M orthogonal carriers, and the four parallel modulated signals are added together. Get one channel of serial data and send it to the channel, add Gaussian white noise to...

specific Embodiment 2

[0037] The above specific embodiment 1 is based on OFDM single-antenna transceiver system, on this basis, introduces multi-antenna transmission and multi-antenna reception system, that is, introduces MIMO technology on the basis of OFDM technology, and obtains a wireless trigger system based on MIMO-OFDM.

[0038] Taking two transmitting antennas and two receiving antennas as an example, if the two antennas transmit at the same frequency at the same time, the signals transmitted by the two antennas are susceptible to mutual interference. In order to overcome this interference, it is necessary to ensure that the two antennas transmit The orthogonality of the codes, that is, the cross-correlation function between the code transmitted on one antenna and the code transmitted on the other antenna is zero. In order to fully guarantee this orthogonality, the present invention uses a ZCZ sequence with excellent correlation characteristics.

[0039] In order to better illustrate the re...

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Abstract

The invention relates to a wireless triggering system and method based on an FPGA, and belongs to the field of triggering control. The wireless triggering system mainly comprises an FPGA baseband processing module, a D / A digital-to-analog conversion module, a radio-frequency transceiver module, a D / A analog-to-digital conversion module and a power supply module; a BPSK-OFDM signal generated by theFPGA baseband processing module is up-converted to 2.4GHz through the D / A digital-to-analog conversion module and the radio-frequency transceiver module and is transmitted through an antenna; a receiving antenna is used for down-converting the received signal into the baseband signal through the radio-frequency transceiver module; the baseband signal is transmitted to the FPGA; the FPGA performsfast sliding correlation detection and judgment on the received signal and a local signal; and if a correlation detection result is larger than a set threshold value, triggering is performed. The wireless triggering mode is adopted, so that the environment adaptability is high, and the application range is wide; a ZCZ code of a code group with a good correlation characteristic is selected as a triggering signal, so that the triggering is not easily interfered by noises, and the success rate of detection is high; and a receiving end adopts a "receiving-while-detecting" mechanism, and data receiving and detecting are completed at the same time, so that the triggering time is greatly shortened.

Description

technical field [0001] The invention belongs to the field of trigger control, and in particular relates to an FPGA-based wireless trigger system and method. Background technique [0002] In some areas with relatively high risk, places where wired wiring is not convenient, places with high mobile performance requirements and widely distributed application places, the traditional wired trigger can no longer meet the needs of the system. [0003] With the advancement of wireless communication technology, the demand for wireless triggering and control technology in various fields is gradually increasing. In some specific fields, wireless triggering and control technology often puts forward higher requirements for the synchronization of the system and the reliability of data transmission. For example, in land seismic exploration work, due to the complex terrain and wide range of operations, it is inconvenient to use wired transmission. In many cases, wireless trigger control tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04J13/00H04B7/0413H04L27/32
CPCH04B7/0413H04J13/0055H04L27/2627H04L27/2649H04L27/32
Inventor 蒋伊琳张佳郜丽鹏赵忠凯
Owner HARBIN ENG UNIV
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