FPGA implementation method for EPC-MIMO radar received signal processing

Abstract

The invention discloses an FPGA implementation method for EPC-MIMO radar received signal processing, and the method comprises the steps: collecting a first signal outputted by an EPC-MIMO radar, and obtaining an input signal; performing orthogonal digital down-conversion on the input signal to obtain a real virtual I / Q complex signal; determining a correction coefficient and a multi-waveform separation coefficient, and performing matched filtering on the real and virtual I / Q complex signal in the frequency domain by using the correction coefficient and the multi-waveform separation coefficient to obtain a second signal; determining a phase compensation coefficient of each pulse, and decoding the second signal by using the phase compensation coefficient; and determining a transmitting-receiving beam forming weight of the radar, and forming a digital beam according to the transmitting-receiving beam forming weight and the decoded second signal. According to the invention, not only can the function of EPC-MIMO radar received signal processing be realized on the FPGA, but also the hardware resources of the FPGA can be saved, and the processing speed can be improved.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to an FPGA implementation method and system for EPC-MIMO radar receiving signal processing. Background technique [0002] In an increasingly complex electromagnetic environment, improving the anti-interference capability of the radar seeker is crucial to the precise tracking and guidance capabilities of the seeker. At present, active electronic interference suppression in the main lobe direction is an urgent need for radar seekers solved problem. [0003] For active electronic interference in the main lobe direction, there is an FDA (Frequency Diversity Array, frequency diversity array) radar in the prior art, which is different from the traditional PA (Phased Array, phased array) radar. A small transmit frequency difference is introduced, and the array element phase difference is related to the wave path difference and distance, so that the FDA's transmit pat...

AI Technical Summary

Problems solved by technology

On the basis of the general MIMO radar receiving signal processing, the receiving signal processing of the EPC-MIMO array radar also needs to perform array element-pulse decoding processing to compensate the phase difference of the transmitting signal at the transmitting end, and in terms of hardware implementation, Since the number of multi-waveform separation channels is the product of the number of transmitting channels and the number of receiving channels, once the number of transmitting channels and the number of receiving channels increase, the consumed hardware resources will be very large

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