基于FPGA的数字荧光显示系统设计与实现

Design and application of digital phosphor display system based on FPGA

在现代数字信号处理领域,异常、突发、瞬态信号一直是测量的难题,在传统的信号测量方法中往往采用扫频的方式来检测信号,而这种测量方式最大的缺点在于测量的非实时性,它以一定的步进通过一系列频率段,这样通常会漏掉当前扫描频段之外发生的重要瞬态事件。设计采用了一种全新的信号测量方式-数字荧光显示测量,以FPGA(field programmable gate array)为平台,充分利用FPGA的高速数据处理能力以及现场可编程特性,通过高速的频谱变换将一段时间内的所有频谱信息压缩成一个数据位图矩阵,然后将位图数据配色并显示。通过这些配色后的频谱信息可以很直观地发现在传统测量方法中被漏掉的异常、突发和瞬态信号。

In the fields of modern digital signal processing,there are huge challenges in measuring the abnormal and transient signals.The sweeping method is often used to detect signals in the fields of traditional signal measurement,but the fatal shortcoming for this way is that it＇s not real-time.It goes through a series of frequency segments,which usually neglects the important transient events who are not in the range of current sweeping frequency segments.The design uses a new kind of signal measurement-digital phosphor display,basing on the FPGA （field programmable gate array） platform and taking advantage of the high-speed data processing capabilities,as well as field-programmable features of FPGA.By the high-speed spectral transformation,we compress all spectral information into a bitmaps matrix.Then display the bitmaps matrix with suitable colors.Through the spectrum information expressed by colors,we can be very visual to find those abnormal,sudden and transient signals neglected by traditional measurements.