激光遥感图像高速滤波器算法的FPGA实现

摘要

To fulfill the requirements of high speed and high accuracy filtering for laser remote sensing signals, by adopting the advantages of FPGA, i. e. , multi-task, and highly parallel characteristics, the system for filtering is designed. Considering the filter designed with laser photoelectric sensor may bring large signal attenuation, and request high accuracy, so the solution based on the basic logic cells, multiplexers and storage existing inside FPGA is proposed, through multiplication decomposition and timing design, to implement transplantable high speed image resolution. The FPGA is used as the design platform of the system, and the Verlog language is used for designing program. The experimental results show that this filter possesses high speed and precise filtering functions to laser remote sensing signals, in addition, it is indicated that using low-end FPGA to design laser filter will become future developing trend.%针对激光遥感信号高速高精度的要求，利用FPGA的多任务、高速并行性设计系统进行滤波。考虑到激光光电传感器设计的滤波器会有很大的信号衰减，且具有精度要求高的特点，提出了基于 FPGA内部基本逻辑单元、乘法器、存储器，经过乘法分解和时序设计，实现具有可移植性的图像高速分辨的方法。系统采用FPGA设计平台，并用Verilog语言设计程序。试验结果验证，该滤波器对激光遥感信号具有高速、精确滤波功能，同时表明利用低端FPGA设计激光滤波器必将成为未来发展趋势。