Signal processing method and system

A signal processing and signal technology, applied in the field of astronomy, can solve the problems of poor computing power, narrow coverage bandwidth, low flexibility, etc., and achieve the effects of high precision, wide coverage bandwidth, and high flexibility

Inactive Publication Date: 2018-07-17
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

However, the signal processing method in the existing receiving system has a narrow coverage bandwidth, low flexibil

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Embodiment Construction

[0016] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0017] figure 1 Is a flowchart of a signal processing method in an embodiment of the present invention, such as figure 1 As shown, it includes: converting the radio frequency signal received by the antenna into a digital signal; performing parallel filtering of multi-channel signals on the digital signal to generate a filtered signal; performing fast Fourier based on the Goertzel algorithm on the filtered signal Transform to generate a Fourier-transformed signal; perform signal power detection on the Fourier-transformed signal to generate a power-detected signal to complete the preprocessing of the radio frequency signal received by the antenna.

[0018] It should be noted that the signal processing method propose...

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Abstract

The invention provides a signal processing method and system; the signal processing method comprises the following steps: converting a radio frequency signal received by an antenna into a digital signal; performing multi-channel signal parallel filtering on the digital signal to generate a filtered signal; performing fast fourier transformation on the filtered signal based on a Goertzel algorithmto generate a fourier transformed signal; and carrying out signal power detection on the fourier transformed signal to generate a power detection signal, so as to finish preprocessing of the radio frequency signal received by the antenna. According to the signal processing method and system provided by the invention, the coverage bandwidth is wide, the flexibility is high, and the precision is high. Through the process of setting filtering and the process of fourier transformation, multi-level DDC, PFB, FFT and FIR can be adopted and combined to achieve the best frequency resolution on the FPGA with the same level. By applying the Goertzel algorithm in the fast fourier transform, the operational capability of the fourier transform mode can be improved.

Description

Technical field [0001] The present invention relates to the field of astronomy, and more specifically, to a signal processing method and system. Background technique [0002] Ultra-wideband receivers and phased array receivers together become the two major directions for future receiver development. At the same time, ultra-wideband technology is the most stringent receiver for software, hardware and firmware design and technical requirements, and it is a challenging exploratory scientific research instrument. In the past 5 years, with the development of semiconductor technology (such as ultra-high-speed and high-precision analog-to-digital conversion chips) and the improvement of real-time computing capabilities of high-speed and large-data chips (such as faster field programmable arrays), it gradually meets the needs of telescopes. Wide bandwidth requirements. As a result, it is possible to gradually cover the entire available frequency range of the telescope from a set of rec...

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Application Information

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IPC IPC(8): H04B1/00H04B1/30H04L1/00G06F17/14
CPCH04B1/005G06F17/141H04B1/0035H04B1/0042H04B1/30H04B2001/307H04L1/0083
Inventor 段然张馨心李菂
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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