Data rate conversion technology for signal is one of the key technologies of wideband digital reconnoitering receiver . it is the feasible scheme to resolve the rate gap between the front end data flow of high speed analog digital converter ( adc ) sampling and the back end digital signal processor ( dsp ) processing 双信号数据率转换技术是宽带数字侦察接收机关键技术之一,是解决宽带数字接收机中前端高速adc采样的高速数据流与后端dsp处理速度之间瓶颈问题的可行方案。
Upon converting the sound waves into a flood of digital data , the signal passes through an analog digital or short a d converter , which performs a time - based rasterization of the incoming signal and determines a certain level with which the wave could , for example , reach our ear with every passing second 回到声音切割部分,如之前提到的欲将声波储存时,其实也就是将模拟analog讯号转换为数字digital信号再加以储存,连续的模拟信号将被切割成如图的阶梯状,回到我们的耳朵就会变成断断续续的声音。
Parameter - tuning stochastic resonance ( psr ) is a more realistic way to handle the phenomenon of sr in a broad sense . based on the theory of psr , some key problems of using sr in signal processing are studied , these issues include : the application of intrawell sr in multi - frequency analog signal processing , recovery of the waveform distortion caused by the bistable system and other post treatments , measure of system performance with multi - frequency analog digital input and measurement of system performance of binary digital input . the results are used in signal detecting under the background of the real sea noise 随着参数调节随机共振( psr )概念的提出,随机共振在信号处理中的应用有着很大拓展的空间,本文就主要研究几个目前随机共振在信号处理中应用时经常碰到的问题,其中包括阱内随机共振现象对多频模拟信号处理的应用、双稳态系统输出的波形畸变的消除及其他后处理、适用于多频信号的输出性能衡量指标、二进制数字信号输入情况下的系统输出的性能衡量,并将所得的结果应用到了一个自然界的噪声? ?海洋噪声背景下的信号检测中,这些研究对于随机共振理论的进一步发展及其在非线性信号处理中的应用具有重要的意义。
Supported by heilongjiang province natural science foundation projects " research on the errors mechanism of time division a . c . power measurement " ( no . e9719 ) , " research on theory of analog digital mixed sampling power energy measurement " ( no . e01 - 15 ) and foundation for university key teacher by the ministry of education " the research on the low audio frequency a . c . power measurement smart instrument " ( no . 1087 ) , in this dissertation it is made that a systematic and deep study on power measurement model errors and instrument errors about analog sampling , digital sampling and mixed sampling measurement , and fully experiments about mixed sampling measurement 本学位论文在黑龙江省自然科学基金资助项目“时分割交流功率测量原理误差产生机理的理论研究” (编号: e9719 ) , “模拟数字混合采样功率与电能测量的理论研究” (编号: e01 - 15 )和教育部高等学校骨干教师资助计划项目“中频电功率测量智能仪器的研制” (编号: 1087 )的资助下,以电功率模拟采样测量、数字采样测量和混合采样测量方法为对象,对电功率测量的原理误差和仪器误差进行了系统和深入的理论研究和有关的实验研究。
The thesis includes the design of hard circuit , pcb ( printed circuit board ) , driver and application soft involving a / d board and d / a board . the detailed functional modules consist of multiplex signals select module 、 analog digital conversion module 、 digital analog conversion module 、 pci protocol conversion module 、 driver and magnifying module 、 control logic 、 clock circuit and configuration circuit . the importance of the thesis is a / d board 本课题包括硬件电路、印刷电路板( pcb ) 、驱动程序和应用软件的设计,涉及a / d板和d / a板两大块部分,具体的功能模块包括多路信号选择模块、模数转换模块、数模转换模块、 pci协议转换模块、驱动放大模块、控制逻辑、时钟电路和配置电路,其中重点是a / d板部分。