Digital receiving apparatus, system, and method for tracking and observing target radio source

Patent metadata

Field	Value
Publication number	US-11143742-B2
Application number	US-202017265206-A
Country	US
Kind code	B2
Filing date	May 25, 2020
Priority date	Feb 19, 2020
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A digital receiving apparatus includes an analog-to-digital conversion module, a polyphase filter module, a fast Fourier transform module and a phase compensation module, which transforms signals of a target radio source from time domain to frequency domain. It further includes a standard time acquisition module configured to acquire a standard timestamp, a communication module configured to communicate with a host computer, a delay parameter temporary storage module configured to store a to-be-compensated delay parameter, a control enable module configured to generate an enable signal, a delay module configured to perform delay, and a phase parameter generation module configured to temporarily store the to-be-compensated delay parameter and convert it into a phase compensation parameter. The present invention achieves precise synchronous system startup, and the to-be-compensated parameter is updated and aligned in real time to compensate for a time-varying delay difference to accurately track with precision and observe the target radio source.

First claim

What is claimed is:

1. A digital receiving apparatus for tracking and observing a target radio source, comprising
an analog-to-digital conversion module, a delay parameter temporary storage module, a polyphase filter module, a fast Fourier transform module, a phase compensation module, a phase parameter generation module, a standard time acquisition module, a control enable module, a communication module, and a delay module; wherein
the analog-to-digital conversion module is configured to acquire a real-time antenna signal from the target radio source, acquire a to-be-compensated delay parameter in the delay parameter temporary storage module at a corresponding moment based on an update enable sent by the control enable module, compensate the real-time antenna signal by a delay equal to an integral multiple of a sampling period in combination with a read enable and a write enable to obtain a delay-compensated antenna signal, and then send the delay-compensated antenna signal to the polyphase filter module;
the polyphase filter module is configured to perform polyphase filtering on the delay-compensated antenna signal to obtain a filtered antenna signal and send the filtered antenna signal to the fast Fourier transform module;
the fast Fourier transform module is configured to perform a fast Fourier transform on the filtered antenna signal to obtain a transformed frequency-domain signal and send the transformed frequency-domain signal to the phase compensation module;
the phase compensation module is configured to compensate for, based on a phase compensation parameter sent by the phase parameter generation module, a phase difference of the transformed frequency-domain signal, and output a spectrum signal for tracking and observing the target radio source, wherein the phase difference of the transformed frequency-domain signal is caused by a delay difference less than the sampling period;
the standard time acquisition module is configured to acquire a timestamp of a standard time server and send the timestamp to the control enable module;
the communication module is configured to establish a communication between a host computer and each of the delay parameter temporary storage module, the control enable module and the phase parameter generation module, send an acquired control instruction sent by the host computer to the control enable module, and send an acquired current to-be-compensated parameter sent by the host computer to the delay parameter temporary storage module and the phase parameter generation module;
the control enable module is configured to generate the read enable, the write enable and the update enable based on the timestamp of the standard time server and the acquired control instruction sent by the host computer, and send the read enable, the write enable and the update enable to the delay parameter temporary storage module, the delay module, and the analog-to-digital conversion module;
the delay parameter temporary storage module is configured to temporarily store the to-be-compensated delay parameter equal to an integral multiple of the sampling period in a continuous observation period;
the delay module is configured to delay the read enable by a set time to obtain a delayed read enable and send the delayed read enable to the phase parameter generation module; and
the phase parameter generation module is configured to temporarily store a to-be-compensated delay parameter less than the sampling period in the continuous observation period, read the to-be-compensated delay parameter less than the sampling period at the corresponding moment according to a read enable signal outputted by the delay module, and convert the to-be-compensated delay parameter less than the sampling period into a phase compensation parameter.

2. The digital receiving apparatus for tracking and observing the target radio source according to claim 1 , wherein
the standard time acquisition module is connected to the control enable module;
the control enable module is further connected to the delay parameter temporary storage module, the delay module, the analog-to-digital conversion module, and the communication module, respectively;
the communication module is further connected to the delay parameter temporary storage module and the phase parameter generation module, respectively;
the delay module is further connected to the phase parameter generation module;
the delay parameter temporary storage module is further connected to the analog-to-digital conversion module;
the analog-to-digital conversion module, the polyphase filter module, the fast Fourier transform module, and the phase compensation module are successively connected; and
the phase parameter generation module is further connected to the phase compensation module.

3. The digital receiving apparatus for tracking and observing the target radio source according to claim 2 , wherein a window function of the polyphase filter module is a Hamming window.

4. The digital receiving apparatus for tracking and observing the target radio source according to claim 1 , wherein a window function of the polyphase filter module is a Hamming window.

5. A digital receiving system for tracking and observing a target radio source, comprising a host computer, a standard time server, and one or more digital receiving apparatuses for tracking and observing the target radio source according to claim 1 ; wherein
a system time of the host computer and a system time of a digital receiving apparatus of the one or more digital receiving apparatuses for tracking and observing the target radio source are synchronized with a standard time of the standard time server;
the host computer is communicatively connected to the digital receiving apparatus for tracking and observing the target radio source; and
the host computer is configured to set a synchronous start time of the digital receiving apparatus for tracking and observing the target radio source, calculate in real time a to-be-compensated delay of the target radio source under observation according to the system time of the host computer and the system time of the digital receiving apparatus, update in real time the to-be-compensated delay parameter equal to the integral multiple of the sampling period to the delay parameter temporary storage module in the digital receiving apparatus for tracking and observing the target radio source, and update in real time the to-be-compensated delay parameter less than the sampling period to the phase parameter generation module in the digital receiving apparatus for tracking and observing the target radio source.

6. A digital receiving method based on the digital receiving system for tracking and observing the target radio source according to claim 5 , comprising:
step S 10 , starting the digital receiving system for tracking and observing the target radio source according to a set start mode, and enabling the digital receiving apparatus to start to work;
step S 20 , acquiring in real time, by the analog-to-digital conversion module in the digital receiving apparatus, the to-be-compensated delay parameter at the corresponding moment from the delay parameter temporary storage module according to the update enable, and performing, by the analog-to-digital conversion module in the digital receiving apparatus, a delay compensation on a collected original antenna signal in real time in combination with the write enable and the read enable;
step S 30 , performing, by the polyphase filter module in the digital receiving apparatus, signal filtering according to data outputted by the analog-to-digital conversion module and a first data valid signal, and performing, by the fast Fourier transform module in the digital receiving apparatus, fast Fourier transform processing accordin

Assignees

• Inst Automation Cas
• Guangzhou Artificial Intelligence And Advanced Computing Inst Of Casia

Inventors

• Shu Lin
• Hao Jie
• Liang Jun
• Song Yafang
• Zhao Liangtian
• Fan Qiuxiang
• Feng Hui
• Hu Wenqing

Classifications

• G01S3/02

  using radio waves · CPC title

• G01S3/10 Primary

  Means for reducing or compensating for quadrantal, site, or like errors · CPC title

• G01S7/2921

  based on data belonging to one radar period · CPC title

• G01S7/295 Primary

  Means for transforming co-ordinates or for evaluating data, e.g. using computers · CPC title

• G01S7/2883

  using FFT processing · CPC title