关键词: FPGA, 修正施密特正交化, 三角分解, 自适应波束形成

Abstract:

Based on the theoretical analysis of adaptive beamforming algorithm,the modified Gram Schmidt orthogonal algorithm (MGS) is used in the algorithm based on the QR decomposition of inversion sample matrix (QRD-SMI) to propose the QRD-SMI algorithm based on the MGS algorithm with specific programmable gate array (FPGA) implementation structure given:multiplexing QR decomposition array (MQRD-IMGS) based MGS.The FPGA implementation structure uses coordinate rotation digital computer (CORDIC) to replace the division operational in MGS,effectively saving hardware resource consumption and the structure time delay.Hardware simulation shows that the highly modular MQRD-IMGS maintains numerical stability with good suppression of the interfering signals and small hardware resource consumption.

Key words: FPGA;modified Gram Schmidt orthogonal algorithm;QR decomposition;adaptive beamforming