CN214794999U

CN214794999U - FPGA-based frequency domain trigger data acquisition system

Info

Publication number: CN214794999U
Application number: CN202120427894.8U
Authority: CN
Inventors: 龚晓峰; 刘绍锐; 蔡钦
Original assignee: Chengdu Dagong Bochuang Information Technology Co ltd
Current assignee: Chengdu Dagong Bochuang Information Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-11-19
Anticipated expiration: 2031-02-26

Abstract

The utility model discloses a frequency domain trigger data acquisition system based on FPGA, which relates to the technical field of radio monitoring and comprises a frequency spectrum template storage module, a frequency spectrum calculation module, a frequency spectrum monitoring module and a data acquisition module; the spectrum template storage module is connected with the spectrum monitoring module, and the spectrum calculation module, the spectrum monitoring module and the data acquisition module are sequentially connected; the spectrum template storage module is used for connecting an upper computer data download link, receiving a spectrum template set by an upper computer and storing the spectrum template into the RAM device; the frequency spectrum calculation module is used for receiving the real-time IQ data, performing frequency spectrum calculation and outputting the frequency spectrum data in real time; the frequency spectrum monitoring module is used for capturing a trigger condition and outputting a trigger enabling signal to the data acquisition module; the data acquisition module is used for receiving a frequency domain trigger acquisition start signal.

Description

FPGA-based frequency domain trigger data acquisition system

Technical Field

The utility model relates to a radio monitoring technology field specifically is a frequency domain triggers data acquisition system based on FPGA.

Background

The existing acquisition modes mainly include conventional single frequency, fast frequency sweep, accurate scanning and discrete scanning, and mainly analyze known frequency signals and frequency spectrum environment in a frequency range for monitoring and analyzing, so that instantaneous signals in the frequency spectrum environment cannot be identified, acquired and analyzed, and interference signals suddenly appearing in the frequency spectrum environment cannot be identified quickly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a frequency domain triggers data acquisition system based on FPGA.

The purpose of the utility model is realized through the following technical scheme:

a frequency domain trigger data acquisition system based on FPGA comprises a frequency spectrum template storage module, a frequency spectrum calculation module, a frequency spectrum monitoring module and a data acquisition module; the spectrum template storage module is connected with the spectrum monitoring module, and the spectrum calculation module, the spectrum monitoring module and the data acquisition module are sequentially connected;

the spectrum template storage module is used for connecting an upper computer data download link, receiving a spectrum template set by an upper computer and storing the spectrum template into the RAM device;

the frequency spectrum calculation module is used for receiving the real-time IQ data, performing frequency spectrum calculation and outputting the frequency spectrum data in real time;

the frequency spectrum monitoring module is used for capturing a trigger condition and outputting a trigger enabling signal to the data acquisition module;

the data acquisition module is used for receiving a frequency domain trigger acquisition start signal.

Preferably, the upper computer is used for setting signal bandwidth and power threshold and drawing a frequency domain template.

The utility model has the advantages that:

the transient signal can be quickly identified through the frequency domain template, and meanwhile, the data is collected for analysis, so that the method has the advantage that the whole process of the transient signal from existence to existence and from existence to nonexistence can be displayed.

Drawings

Fig. 1 is a schematic diagram of the system of the present invention.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1, a frequency domain trigger data acquisition system based on FPGA includes a spectrum template storage module, a spectrum calculation module, a spectrum monitoring module and a data acquisition module; the spectrum template storage module is connected with the spectrum monitoring module, and the spectrum calculation module, the spectrum monitoring module and the data acquisition module are sequentially connected;

The utility model discloses a theory of operation does: firstly, executing initialization RAM memory, completing initialization, and waiting for receiving a frequency spectrum template; the upper computer draws a frequency domain template and then stores the frequency domain template by setting a signal bandwidth and a power threshold, then sets a central frequency and a filtering bandwidth, respectively configures acquisition parameters of 'total triggering acquisition', 'acquisition frame number after triggering', 'triggering mode', 'triggering times', and starts to acquire; the frequency spectrum template storage module receives acquisition parameters and frequency spectrum templates sent by an upper computer, and writes template data into the RAM device; meanwhile, the frequency spectrum calculation module receives real-time IQ data, and outputs the real-time frequency spectrum data to the frequency spectrum monitoring module after windowing, FFT, bit expansion, amplitude calculation, amplitude quantization and output buffer processing; the frequency spectrum monitoring module reads the frequency spectrum template and real-time frequency spectrum data, namely a monitoring information template, performs matching comparison, judges whether the monitoring information template exceeds the frequency spectrum template, and outputs a trigger enabling signal to the frequency domain trigger acquisition module; the frequency domain trigger acquisition module starts to acquire IQ or frequency spectrum data after receiving data acquisition information sent by an upper computer, if a trigger enable signal is invalid, the current acquisition is kept and a trigger state is waited for, when a trigger condition is met, a specified data frame is acquired in a delayed mode, the trigger data is uploaded to the upper computer to display IQ envelope and signal frequency spectrum, then the state is transferred to the trigger state waiting for, otherwise, the trigger state waiting for next trigger is returned, and after the stop information of the upper computer is received, the data acquisition module stops acquiring data, returns to an initial state and waits for the next acquisition start information.

The foregoing is merely a preferred embodiment of the invention, it being understood that the embodiments described are part of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The invention is not intended to be limited to the forms disclosed herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A frequency domain trigger data acquisition system based on FPGA is characterized by comprising a frequency spectrum template storage module, a frequency spectrum calculation module, a frequency spectrum monitoring module and a data acquisition module; the spectrum template storage module is connected with the spectrum monitoring module, and the spectrum calculation module, the spectrum monitoring module and the data acquisition module are sequentially connected;

2. The FPGA-based frequency domain trigger data acquisition system of claim 1, wherein the upper computer is configured to set a signal bandwidth and a power threshold and draw a frequency domain template.