A New Approach to the Analysis of Single Event Transients in VLSI Circuits

Single event transients (SETs) on combinational gates are becoming an issue in deep sub-micron technologies, thus efficient and accurate techniques for assessing their impact are strongly required. This paper presents a new technique that embeds time-related information in the topology of the analyzed circuit, allowing evaluating the effects of SETs via zero-delay simulation instead of timed simulation. The analysis of complex designs becomes thus possible at a very limited cost in terms of CPU time. Moreover, circuits enriched with time-related information are suitable for hardware emulation thus allowing further reducing the time for SET-effect analysis, while providing the same accuracy of state-of-the-art approaches based on timed simulations. The paper reports results showing how the proposed method can be effectively used to analyze complex designs.     

模拟VLSI电路故障诊断的相关分析法

为了提高模拟VLSI电路的测试精度,提出了一种基于数字信号处理的模拟VLSI电路测试方法,将测试响应经余弦调制实现的数字滤波器组完成子带滤波,随后对各子带滤波序列进行能量计算和相关分析,实现模拟响应的数字特征提取,对国际标准电路中的19个故障的实验表明：子带滤波序列的能量计算适合诊断硬故障; 相关分析既可诊断硬故障,又可诊断软故障,实验还表明该方法对故障的分辨率远高于文献[7]。     

Assessing the Soft Error Rate of Digital Architectures Devoted to Operate in Radiation Environment: A Case Studied

The effects of transient bit flips on the operation of processor based architectures is investigated through fault injection experiments performed in the hardware itself by means of the interruption mechanism. Such an approach is based on the execution, as the consequence of an interruption signal assertion, of pieces of code called CEU (Code Emulating Upsets), asynchronously downloaded in a suitable memory area. This paper focuses in the methodology followed to set-up CEU injection experiments on a digital architecture, illustrating it main steps by means of a studied case: the 80C51 microcontroller. Results obtained from automated fault injection sessions performed using the capabilities of a devoted test system, will point out the capabilities and limitations of the studied approach.     

VXI六位半数字多用表设计与实现

本文设计一款基于VXI总线的高精度数字多用表,其精度要求为六位半,通过信号调理电路、电阻分压衰减网络电路以及电流源电路等设计,实现电压、电流、电阻、频率等基本电信号的精确测量,其已应用于某自动测试平台,具有良好的应用前景.     

一种数字电视广告在线发布系统的设计和实现

提出并构建了一个数字电视广告在线发布系统。该系统主要由前端基于C#编程的编辑发布模块,中端基于FPGA的码流信号插入模块和后端数字电视机顶盒接收解析模块构成。介绍了整个系统的构架,并重点介绍了编辑发布模块和在数字电视机顶盒中进行的开发。     

基于TMS320VC5509A的数字音频监听监看设备的设计

介绍了一款使用TI公司的TMS320VC5509A芯片构建的,用于电台AES数字信号监听监看的手持式设备HAM100,可以很方便地用于AES信号的幅度、相位、采样频率、状态以及载波幅度的测试和检查,同时提供模拟音频信号输出,便于直接监听AES音频信号.     

一种由粗到精的大视场弱小目标检测方法

大视场的红外图像,由于分辨率高,对图像实现像素级处理很难满足实时性要求。针对大视场特定背景下的低空目标,提出一种由粗到精的检测方法。先将图像分块,计算分块图像熵值,组成熵值矩阵进行熵值分割,区分背景区域,得到所需求的目标可能出现的区域,完成粗检测;然后用Top-hat形态滤波法对所得区域进行精检测,得到检测目标。实测数据证明,该方法能在检测弱小目标的同时大大减少计算量,较好地满足了大视场下弱小目标的实时检测、处理需求。     

最优子带编码器理论设计及其应用综述

子带编码器(subband coder,SBC)是一种由滤波器组(filter bank,FB)和量化器构成的通用编码模型。常用的变 换编码器及小波(包)编码器都可视为它的特殊形式。对于统计分布已知的信源,如何最优化SBC长期以来一直是自适 应信号压缩领域的难点问题。本文将SBC分为三类:正交均匀、双正交均匀和非均匀SBC。首先提出编码增益准则下SBC 优化的统一形式化描述。然后在该框架下,对每一类SBC,从其最优化的理论研究与算法设计两方面阐述最近10年来的 重大进展。其次介绍最优SBC在现代信号处理中的应用现状,最后指出未来的发展方向。     

A review on evolving domains of Internet of Things: Architecture,applications, and technical challenges

The Internet of Things (IoT) is a system that includes smart items with different sensors, advanced technologies, analytics, cloud servers, and other wireless devices that integrate and work together to create an intelligent environment that benefits end users. With its wide spectrum of applications, IoT is revolutionizing both the current and future generations of the Internet. IoT systems can be employed for broad-ranging real applications, such as agriculture, the environment, cities, healthcare, and the industrial sector. In this paper, we briefly discuss the three-tier architectural view of IoT, its different communication technologies, and the smart sensors. Moreover, we study various application areas of IoT such as the environmental domain, healthcare, agriculture, smart cities, and industrial, commercial, and general aspects. A critical analysis is shown for the existing schemes and techniques related to this work. Further, this paper addresses the basic context, tools and evaluation approaches, future scope, and the advantages and disadvantages of the aforestated IoT applications. A comprehensive analysis is provided for each domain along with its fundamental parameters like the quality of service (QoS), network longevity, scalability, energy efficiency, accuracy, and cost. Finally, this study highlights the technical challenges and open research problems existing in different IoT applications.