A FPGA-based wireless trigger system and method

A wireless, trigger signal technology, applied in radio transmission systems, transmission systems, multi-frequency code systems, etc., can solve problems such as timing control and weak parallel processing capabilities

Active Publication Date: 2021-09-10
HARBIN ENG UNIV
View PDF4 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A FPGA-based wireless trigger system and method
  • A FPGA-based wireless trigger system and method
  • A FPGA-based wireless trigger system and method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0034] 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.

[0035] 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

[0039] 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.

[0040] 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.

[0041] In order to better illustrate the re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An FPGA-based wireless trigger system and method belong to the field of trigger control. The wireless trigger system of the present invention mainly comprises FPGA baseband processing module, D / A digital-to-analog conversion module, radio frequency transceiver module, A / D analog-to-digital conversion module, power supply module; The BPSK-OFDM signal that FPGA baseband processing module produces passes D / A digital The analog conversion module and the RF transceiver module up-convert the frequency to 2.4GHz and transmit it through the antenna. The receiving antenna converts the received signal back to the baseband signal through the RF transceiver module, and then transmits it to the FPGA through the A / D analog-to-digital conversion module. The received signal and the local signal are detected and judged by fast sliding correlation. If the correlation detection result is greater than the set threshold, it will be triggered. The invention adopts a wireless trigger mode, has strong adaptability to the environment, and has a wide application range; the code group ZCZ code with good correlation characteristics is selected as the trigger signal, which is not easily disturbed by noise and has a high detection success rate; the receiving end adopts the "detection while receiving" mechanism , Data receiving and detection are completed at the same time, which greatly shortens the trigger time.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap