Implementation of real-time LCMV adaptive digital beamforming technology

Abstract

The increasingly complicated electromagnetic environment demands much higher performance for the radar and wireless communication system, e.g. faster speed and higher accuracy. To meet these requirements, multi-input and multi-output (MIMO) antennas have been widely adapted. Adaptive Digital beamforming (ADBF) technology is a key part of multi-input and multi-output Antenna system. Adaptive digital beam forming could auto adjust weights with the changing of environment, and obtain the optimal results under the particular rule. Linearly constrained minimum variance (LCMV) adaptive digital beamforming technology is been used most in MIMO antenna systems. In engineering, some system chose Digital Signal Processor (DSP) as target device to implement ADBF technology. However, Field Programmable Gate Array (FPGA) has better performance in array signal processing. It is reprogrammable, low-power dissipation, parallel processing and high communication bandwidth. Adaptive Digital beamforming technology processes multichannel data which demand parallel processing, so it's more suitable for FPGA implementation. This paper designs the implementation of linearly constrained minimum variance (LCMV) adaptive digital beamforming technology based on Xilinx ZYNQ xc7z020clg484-1 FPGA by using Xilinx Vivado kits.