共查询到20条相似文献,搜索用时 15 毫秒
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SoC在不同应用场景的频率不同,导致关键路径的时序余量会有较大的差异,在芯片设计阶段,为了保证芯片最坏情况下依然能够正常运行,增加了较大的电压余量,所以固定电压供电会造成不必要的功耗损失.基于最大程度节约功耗的需求,介绍了一种基于线下校准和延时链实时监测的自适应电压调节系统,实时监测电路时序,结合数字低压差线性稳压器(... 相似文献
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Data transmission at rates of 1.2 kbits/s or higher through voiceband ionospheric channels is subject to impairment from severe linear distortion, fast channel time variations, and severe fading. In this paper, we have focused on the performance of DFE (decision feedback equalization) receivers for communication over 3 kHz bandwidth HF channels. We describe the results of simulations for a wide range of fading rates on simulated and real recorded HF channels, using fractionally spaced DFE receivers. Both LMS (least mean square) and FRLS (fast recursive least squares) adaptation algorithms with periodic restart were evaluated, and both ideal-reference and decision-directed operation was observed. The results indicate that FRLS adaptation yields superior performance to LMS in rapid fading conditions, but that this performance advantage diminishes at low signal-to-noise ratios. Also, fade rates greater than about 1 Hz produced relatively high error rates, irrespective of which adaptation method was employed. Finally, a novel modification of the simple LMS algorithm which improves its tracking ability was evaluated. This involved preceding the LMS DFE receiver with an adaptive lattice whitening filter. 相似文献
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Jim Flynn Brandon Waldo 《电子设计应用》2005,(4):86-89
SoC在尺寸和速度方面的增长已经给大量设计带来了功耗方面的挑战,本文介绍了一些可用于SoC整个设计流程中的功率优化和分析技术。 相似文献
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分析了蓝牙技术规范,提出了一种基于平台的蓝牙片上系统的设计方法,实现了蓝牙基带IP设计与性能评估,采用了融合有限状态机和门控时钟的低功耗设计,并结合层次化功耗管理策略实现了基于平台的低功耗蓝牙片上系统,基于实现的蓝牙系统平台完成了蓝牙SoC软硬件协同设计和验证,提出了一种基于片上系统平台的测试方法,并进行了实测,结果表明系统开发周期短、易扩展、功耗低并具有良好的传输特性。该设计已用于标准蓝牙通信系统的构建,并基于该系统平台进行蓝牙功能改进,实现了增强型蓝牙通信系统。 相似文献
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数字阵列模块的筛选是剔除早期失效、提高产品使用可靠性的重要手段,而电老炼是其中重要的环节.针对数字阵列模块筛选的具体需求,提出了研究实用化的电老炼系统并详细阐述了系统设计方案,以达到提高产品可靠性的目的. 相似文献
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一款低功耗SoC芯片的时钟管理策略 总被引:3,自引:2,他引:1
文章提出一种系统级和RTL级协同设计的时钟管理策略,显著地降低了时钟网络的动态功耗,弥补了现有工具只能在设计后期才能发挥作用的不足,达到降低整个SoC芯片功耗的目的;同时,分析该方案实现中可能存在的问题.并给出解决方案。 相似文献
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微波集成电路(MIC)是雷达和微波通信系统中的关键部分,其可靠性试验对于保证交付产品的质量具有重要的作用.老炼试验是可靠性筛选的关键一环,因而也是产品质量保证的重要手段.对MIC老炼试验技术进行了研究,并针对老炼夹具的设计、ESD与EMP防护和自激振荡的预防与消除提出了具体的解决措施. 相似文献
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近年来,随着FPGA电路在军工和航天领域的广泛应用,用户对FPGA电路的可靠性要求也越来越高。在集成电路的可靠性评估试验中,动态老化试验是最重要的试验之一,FPGA动态老化技术的实现可以提高FPGA电路的可靠性。文章通过研究FPGA电路内部结构和功能模块,讨论FPGA电路加载配置过程的原理和流程,通过对动态老化和静态老化的对比试验和结果分析,研究出FPGA电路动态老化试验方法,并在工程实践中得到了成功实现和应用。 相似文献
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High-speed asynchronous transfer mode (ATM)wireless networks are assuming a growing interest in thepersonal communication area. This paper proposes anaccess technique for such networks, which is being implemented in the MEDIAN project belonging tothe European Community (EC) Advanced CommunicationsTechnologies and Services (ACTS) program. The proposedaccess technique aims at providing a simple, efficient, and transparent transport for ATM cells from abase station (BS) interfaced with the ATM network, toATM portable stations (PSs) and vice versa. Atime-division duplex (TDD) scheme is adopted in whichuplink and downlink frame durations can be variedframe-by-frame, in order to fit the presentuplink/downlink traffic mix. In the uplink, anappropriate packet reservation multiple access(PRMA)-based technique is considered. 相似文献
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廖红 《电子产品可靠性与环境试验》2014,(3):61-66
供电抢修工作及时、顺利地开展是确保电网安全、稳定运行的关键。为了保障抢修工作的顺利开展,抢修物资的快速到位是重中之重,物资的快速配送依赖库存物资的有效管理。介绍了如何通过移动终端和信息系统的应用,通过业务流程的优化、规范的管理,保障了抢修工作的顺利开展,抢修物资及时配送到位;并使物资库存得到有序的管理;同时促进了抢修项目的结算效率,提升了抢修工作的管理效率。 相似文献
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二阶偏振模色散自适应补偿的关键技术 总被引:1,自引:6,他引:1
对自行研制的能同时补偿一阶和二阶偏振模色散的自适应补偿器作了详细介绍。以光波偏振度(DOP)为监控信号,用局部邻居结构的粒子群优化算法(LPSO)为逻辑控制算法,使搜索时间低于100ms,跟踪过程响应时间为16ms,基本实现了实时跟踪补偿。 相似文献
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Safety-critical system (SCS) has highly demand for dependability, which requires plenty of resource to ensure that the system under test (SUT) satisfies the dependability requirement. In this paper, a new SCS rapid testing method is proposed to improve SCS adaptive dependability testing. The result of each test execution is saved in calculation memory unit and evaluated as an algorithm model. Then the least quantity of scenario test case for next test execution will be calculated according to the promised SUT's confidence level. The feedback data are generated to weight controller as the guideline for the further testing. Finally, a compre- hensive experiment study demonstrates that this adaptive testing method can really work in practice. This rapid testing method, testing result statistics-based adaptive control, makes the SCS dependability testing much more effective. 相似文献