Array channel correction system and method based on FPGA

Abstract

The invention relates to the technical field of radar, in particular to an array channel correction system and method based on an FPGA. A transmitting channel comprises a multi-channel transmitter anda transmitting antenna array; a receiving channel comprises a multi-channel receiver; the rotary control unit comprises a rotary table and a high-precision rotary table controller; the transmitting channel and the receiving channel are fixed on the rotation control unit; a corner reflector or a target simulator is fixed at the other end of the darkroom; the distance between the rotation control unit and the corner reflector meets the far-field condition. The output end of the receiving channel is connected with 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, the correction calculation and storage unit is composed of an FPGA and a synchronous dynamicread-only memory SDRAM, and the correction calculation and storage unit is connected with the data acquisition and signal processing unit through a 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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