A fpga-based array channel correction method

Abstract

The present invention relates to the field of radar technology, specifically, an FPGA-based array channel calibration system and method, wherein the transmitting channel includes a multi-channel transmitter and a transmitting antenna array, the receiving channel includes a multi-channel receiver, and the rotation control unit includes A turntable and a high-precision turntable controller, the transmitting channel and receiving channel are fixed on the rotating control unit, the corner reflector or target simulator is fixed at the other end of the darkroom, the distance between the rotating control unit and the corner reflector is in line with Field conditions, the output end of the receiving channel is connected to the data acquisition and signal processing unit, the data acquisition and signal processing unit is composed of an analog-to-digital converter ADC and a field programmable gate array FPGA, and the correction calculation and storage unit is composed of an FPGA and a synchronous dynamic read-only memory The SDRAM is formed, and the correction calculation and storage unit is connected with the data acquisition and signal processing unit through the bus.

Description

technical field [0001] The present invention relates to the technical field of radar, specifically, an FPGA-based array channel correction system and method, which is used to correct the channel error in a multi-antenna multi-channel array or a multiple-input multiple-receive (MIMO) radar system and method, which can be used To solve the problem of inconsistent amplitude and phase response of multiple antennas and multiple transceiver channels in an array or MIMO system. Background technique [0002] At present, in the field of radar array calibration technology at home and abroad, there are two main methods for correcting the amplitude and phase errors of the transmitting or receiving system: injection reference correction and blind correction. [0003] Ye Siqing and others disclosed a reference injection correction method in their patent application document "A Method and System for Channel Calibration" (publication number CN100514947C, application number 200510135012.6, f...

AI Technical Summary

Problems solved by technology

It requires that the reference signal data obtained by the direct coupling of the transmitting antenna channel and the sampling data passing through the radio frequency channels of the transmitting antenna are strictly synchronized, otherwise the adaptive iterative algorithm will diverge and the purpose of correction will not be achieved.

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