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以广州数字电视移动直播车为例,清晰地阐述了数字电视移动直播车工程传输系统测试方案.测试包括编码器的测试、数字电视发射机的测试、数字电视发射天线的测试和综合移动传输覆盖的测试,为同类设备的测试提供了借鉴和参考. 相似文献
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介绍了嵌入式Linux内核实时性问题的背景及其在实际中的应用.提出了实时性测试的2个主要指标:进程切换时间和中断延迟时间.前者测试包括2个方案:一是通过程序测量父子进程切换时间,二是借助Lmbench工具测量进程上下文切换时间;后者则采用测量时钟中断延迟的方法来实现.针对3个测试实验,分别给出了方案设计、方案实现和测试结果与分析.最后在分析和实验的基础上得出几点重要结论,并给出2种实时性的改进方案. 相似文献
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本文提出一种三维片上系统(3D SoC)的测试策略,针对硅通孔(TSV,Through Silicon Vias)互连技术的3D SoC绑定中和绑定后的测试进行优化,由于测试时间和用于测试的TSV数目都会对最终的测试成本产生很大的影响,本文的优化策略在有效降低测试时间的同时,还可以控制测试用的TSV数目,从而降低了测试成本.实验结果表明,本文的测试优化策略与同类仅考虑降低测试时间的策略相比,可以进一步降低约20%的测试成本. 相似文献
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双通道分析仪表可用来测试两路相位相参的调制信号间的时间关系,并验证该方案在两项应用中的可行性.一方面验证使用互相关技术方法测试信号间时间关系的可行性,另一方面通过对被测电路器件的输出和输入信号的相关测试,得到电路在复杂激励状态下的延迟特性.通过实验测试,检验双通道矢量信号分析仪分析测试双路调制信号时间关系的功能和性能. 相似文献
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传统的STUMPS测试方法,存在测试时间长和故障覆盖率不够高的缺点.为减少测试时间,采用Test-Per-Clock方式和向量压缩的方法处理待测电路CUT;减少了测试时间;用随机测试模式加存储测试模式,来提高故障覆盖率.经ISCAS'85标准测试电路验证,新方案取得了令人满意的结果. 相似文献
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针对当前PDM系统在航空发动机制造业应用时无法高效处理海量数据存储吞吐的问题。文中提出了一种面向PDM系统的新型NoSQL分布式数据存储方案。该方案采用NoSQL数据库搭配Ceph分布式文件处理模块作为存储结构,并设计了基于Spark的MapSearch分步查询处理方法对数据进行读取和重构。实验测试结果验证了所提方案的可靠性,且与同类研究结果的数据相比,该存储方案进行数据写存和读取的时间分别减少了约20%及41.6%,传输速度提升了约70%,数据重构完整性的均值则为92%,为先进制造业的PDM系统存储结构设计提供了一种新思路。 相似文献
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We present an analysis of test application time for test data compression techniques that are used for reducing test data volume and testing time in system-on-a-chip (SOC) designs. These techniques are based on data compression codes and on-chip decompression. The compression/decompression scheme decreases test data volume and the amount of data that has to be transported from the tester to the SOC. We show via analysis as well as through experiments that the proposed scheme reduces testing time and allows the use of a slower tester. Results on test application time for the ISCAS'89 circuits are obtained using an ATE testbench developed in VHDL to emulate ATE functionality. 相似文献
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In this paper, we examine and compare numerically the board-level reliability of fan-in and fan-out package-on-package stacking assemblies subjected to a specific pulse-controlled drop test condition. The transient analysis follows the support excitation scheme and incorporates with an implicit time integration solver. Numerical results indicate that drop reliability of the package-on-package stacking assembly with a fan-out structural configuration is similar to that with a fan-in design. 相似文献
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中间绑定测试能够更早地检测出3D堆叠集成电路绑定过程引入的缺陷,但导致测试时间和测试功耗剧增.考虑测试TSV、测试管脚和测试功耗等约束条件,采用整数线性规划方法在不同的堆叠布局下优化中间绑定测试时间.与仅考虑绑定后测试不同,考虑中间绑定测试时,菱形结构和倒金字塔结构比金字塔结构测试时间分别减少4.39%和40.72%,测试TSV增加11.84%和52.24%,测试管脚减少10.87%和7.25%.在测试功耗约束下,金字塔结构的测试时间增加10.07%,而菱形结构和倒金字塔结构测试时间只增加4.34%和2.65%.实验结果表明,菱形结构和倒金字塔结构比金字塔结构更具优势. 相似文献
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Usha Sandeep Mehta Kankar S. Dasgupta Nirnjan M. Devashrayee 《Journal of Electronic Testing》2010,26(6):679-688
A compression-decompression scheme, Modified Selective Huffman (MS-Huffman) scheme based on Huffman code is proposed in this
paper. This scheme aims at optimization of the parameters that influence the test cost reduction: the compression ratio, on-chip
decoder area overhead and overall test application time. Theoretically, it is proved that the proposed scheme gives the better
test data compression compared to very recently proposed encoding schemes for any test set. It is clearly demonstrated with
a large number of experimental results that the proposed scheme improves the test data compression, reduces overall test application
time and on-chip area overhead compared to other Huffman code based schemes. 相似文献
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Harilaos G. Sandalidis Peter P. Stavroulakis Joe Rodriguez-Tellez 《International Journal of Communication Systems》1998,11(6):379-386
Dynamic channel assignment (DCA) has been discussed in the literature as a way to achieve improved resource management in cellular networks. In the simplest dynamic allocation scheme, all channels are kept in a central pool and are used on a call-by-call basis. DCA is therefore a complex real time operation and various heuristic methods have been devised as mechanisms to give a fast and reliable solution to this problem. This paper examines the implementation of a DCA model using two approaches from the field of evolutionary computation. The first is the so called genetic algorithm (GA) and the second is the combinatorial evolution strategy (CES). Computer simulations evaluate and compare these proposed heuristic DCA schemes concerning their application to a cellular model for both uniform and non-uniform traffic load conditions. © 1998 John Wiley & Sons, Ltd. 相似文献