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目的:探索一种投影初始化无限冲激响应(IIR)壁滤波器的设计以及其在现场可编辑门阵列(FPGA)平台上的实现。方法:首先,利用矩阵实验室(Matlab)矩阵运算的优势,进行算法的仿真,通过对仿真结果的分析,初步评估该算法的有效性;其次,将算法进行理论上的优化,以使其能满足在硬件上运行的可行性;最后,根据现场可编辑门阵列(FPGA)的结构特点以及该算法的运算特点,提出了一种硬件运算结构来实现该滤波器算法。结果:这种投影初始化无限冲激响应(IIR)壁滤波器能充分利用可编辑门阵列(FPGA)并行运算的特点提高运算效率,并能有效的抑制人体内反射回来的杂波信号,提取出了血流的多普勒频移。结论:投影初始化无限冲激响应(IIR)壁滤波器在现场可编辑门阵列(FPGA)里得到了实现。
OBJECTIVE: To explore the design of a projection initialized infinite impulse response (IIR) wall filter and its implementation on a field-programmable gate array (FPGA) platform. Methods: Firstly, the algorithm was simulated by using the advantages of matrix matrices. The validity of the algorithm was evaluated through the analysis of the simulation results. Secondly, the algorithm was theoretically optimized so that its energy And meets the feasibility of running on the hardware. Finally, according to the structural characteristics of the field-programmable gate array (FPGA) and the operation characteristics of the algorithm, a hardware operation structure is proposed to implement the filter algorithm. Results: This IIR wall-filter with initial impulses can make full use of the parallel computing features of the FPGA to improve the computing efficiency and effectively suppress the clutter signals reflected by the human body and extract The Doppler shift of blood flow. Conclusion: Projective Initialization Infinite Impulse Response (IIR) wall filters have been implemented in field-programmable gate arrays (FPGAs).