Design method of ultra-wideband single-conversion multi-channel digital receiving module

Abstract

The invention relates to a design method of an ultra-wideband single-conversion multi-channel digital receiving module. The ultra-wideband single-conversion multi-channel digital receiving module is composed of an analog receiving module body and a digital processing module body. The analog receiving module body processes 2<n>(n=1, 2, 3...) receiving signals and then synthesizes a radio-frequencysignal through a column-wise synthesizer, the radio-frequency signal passes through a section switch filter and then is subjected to frequency mixing and filtering, and a 6 GHz bandwidth wide frequency range signal and a frequency spectrum are shifted to an intermediate frequency of the range being 1-1.4 GHz. The digital processing module enables the input intermediate frequency signal with the bandwidth of up to 400 MHz to be subjected to AD sampling and analog-to-digital conversion, and the sampled signal is directly sent to an FPGA for signal preprocessing. After multiphase filtering channelization processing and amplitude-phase compensation are carried out, 2n-1 channel intermediate frequency digital signals are generated.

Description

technical field [0001] The invention belongs to the design method technology of a digital receiving component in a phased array radar. Background technique [0002] Digital array radar is an emerging technology field of radar. It is a phased array radar that uses digital technology and digital beamforming technology for both reception and transmission. It uses all the information of the antenna array unit signal and uses advanced digital signal processing technology to process the array signal to obtain better and better synthetic beams, which can better resist radio frequency interference and other environmental factors, and can effectively Detect weak target signals and filter out clutter, thereby improving radar detection and tracking capabilities. [0003] The T / R component is the core component of phased array radar. With the development of digital technology and integrated circuit technology, digital T / R components replace analog T / R components composed of phase shi...

AI Technical Summary

Problems solved by technology

For the existing broadband digital receiving components, a large number of double frequency conversion and frequency mixing methods are still used to realize the frequency reduction of the RF signal in the broadband to the intermediate frequency signal, which greatly increases the complexity of the system and easily leads to harmonic spurious, leakage, etc. problems that degrade the performance metrics of the components

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