First , the analog b - mode ultrasonic receiver is discussed in brief in this paper . then , the digital signal processing arithmetic in the digital b - mode ultrasonic receiver is discussed particularly . at last , the arithmetic is implemented based on the fpga platform 本文在简要介绍模拟b超接收机的基础上,详细讨论了数字化b超接收机的数字信号处理算法,并基于fpga开发平台完成了算法的仿真实现。
Higher - level processing algorithms are fit for implementation in dsp which has high operation rate , flexible addressing mode and powerful communication system , since their control is complicated . on the other hand , lower - level processing algorithms have simple operating structure 高层处理算法控制结构复杂,适用于在dsp芯片中实现;底层的信号处理算法数据量大,运算结构相对简单,适合于在fpga中进行硬件实现。
To classify these respiratory sounds , the bp ann method is used . the advanced language is inconvenient to digital signal process , so the method of mixed programming matlab and vb is provided . in the design of hardware , mcu and dsp are both working together 在上位机信号分析时，针对数字信号处理算法高级语言编程繁琐的缺点，提出了matlab与vb相结合编程解决呼吸音信号分析的方案，利用dll在matlab与vb间进行数据传递和matlab信号处理工具包的函数算法。
A retrodirective array can transmit a signal back to the interrogator ’ s position without any a priori knowledge of the incoming angle or relying on sophisticated digital signal processing algorithms . this merit makes it have good applied possibilities in modern military , especially digital commercial communication systems 方向回溯天线能够自动跟踪来波方向,而不需要来波方向的先验知识和复杂的数字信号处理算法,这一特点使其在现代军用、尤其民用数字移动通信系统中有很好的应用前景。
In the thesis , based on design and implementation of the two signal processing system of different requirement , multi - dsp processor structure , dsp - pci interface , system control logic , pci device driver program , user application program are researched . the main content is list as follows : 1 ) according to the lfmcw radar signal processing algorithm , a signal processing system based on pc104 - plus bus is developed 本文通过对以上两种雷达信号处理机的设计开发过程,研究了采用多片dsp信号处理器组建并行处理模块实现信号处理算法的方法,利用pci总线实现处理机数据传输接口,设备驱动程序和控制界面软件开发,实现信号处理机数据传输控制等几个方面的内容,主要工作如下: 1 )针对线性调频连续波雷达信号处理算法,完成了基于pc104 - plus总线的嵌入式信号处理板的设计、制作以及调试。
What i have done in this subject include : 1 . consult the reference about gpr and appreciate the general theory of gpr ; 2 . analyze the signal model of carrier - free pulse ground penetrating radar and the feature of each part of radar echo data 本人的主要工作包括： 1 .查阅探地雷达资料，了解探地雷达基本原理； 2 .分析无载频脉冲探地雷达回波数据信号模型及各信号分量特征； 3 .研究并完成信号处理算法，即杂波抑制和合成孔径处理两部分算法； 4 .实测数据进行仿真，验证算法效果并分析仿真结果。
Since the western countries began the srfcs research in the eighties , theory of signal detection is used in fdi , and it was successful in some fdi functions in several types of testing aircraft . china did the srfcs research recently , but lack of the engineering fdi algorithm . because the " model based signal detection algorithm " is sensitive to the matching accuracy of the mathematics model and aircraft has prominent nonlinear aerodynamic factors , it is difficulty to upgrade the ability of fdi based on the classical signal detection theory and data fusion only 国外自八十年代开展自修复研究，一般采用基于常规数据处理的故障检测理论来实现飞控系统故障检测与隔离功能，现已在几种验证机上取得初步成果，而国内的研究尚缺乏实用的工程算法；同时，基于常规数据处理的故障检测精度对被检测对象的数学模型匹配度敏感，且飞机的气动特性在故障情况下又具有较强的非线性特性，因此，单纯依靠常规的信号处理算法难以进一步提高故障检测的精度。
