Multi-objective design space exploration for system partitioning of FPGA-based Dynamic Partially Reconfigurable Systems

Dynamic Partial Reconfiguration (DPR) enables resource sharing in FPGA-based systems. It can also be used for the mitigation of aging-related permanent faults by increasing the number of redundant Partially Reconfigurable Regions (PRRs). Normally, these PRRs are able to host any of the Partially Reconfigurable Modules (PRMs), or tasks, at one particular instance. This kind of system is called homogeneous. However, the FPGA resource constraints limit the amount of homogeneous redundancy that can be used and hence affect the lifetime of the system. This issue can be addressed by utilizing the heterogeneous approach where each PRR now only hosts a subset of the tasks. Further, the deadlines of the applications must also be taken care of in the design phase to decide the mapping and scheduling of tasks to PRRs. To this end, we propose an application-specific multi-objective system-level design methodology to determine the appropriate number of PRRs and the mapping and scheduling of tasks to the PRRs. Specifically, we propose a lifetime-aware scheduling method that maximizes the system's mean time to failure (MTTF) with different tolerances in the makespan specification of an application. We use the scheduler along with an automated floorplanner for design space exploration at design-time to generate a feasible heterogeneous PRR-based system. Our experiments show that the heterogeneous systems can offer more than 2x lifetime improvement over homogeneous ones. It also offers better scaling with increased tolerance in makespan specification.     

基于有限资源提升网络可生存性的拓扑重构方法

给定网络拓扑结构和有限添加边资源,如何优化配置添加边使重构后的网络拓扑结构具有最优可生存性是非常有价值的研究问题.本文首先明确网络可生存性的量化评估指标,以移除节点后网络结构的鲁棒性和有效性为优化目标,提出网络拓扑重构优化问题的建模与分析方法.同时在给定资源代价的约束下,为实现添加边资源配置效率的最大化,提出优先配置节点加强保护圈的启发式算法.仿真实验表明,该算法在有限资源约束的随机局部故障和选择性攻击环境中,能兼顾改善网络鲁棒性和传输效率,有效提升网络结构的可生存性.     

高速信号处理终端设备的设计

针对某宽带中频软件无线电终端设备,提出了一种高速ADC数据的接收方法,实现了多通道高速波形的采集和接收,并通过灵活的功能重构方式实现了终端设备各种复杂的功能,使用可配置的专用芯片产生出满足各种工作模式下的高速抗干扰模拟中频波形.这些方法和技术已在实际工程中成功应用.     

FPGA远程配置在系留气球中的研究与应用

本文给出了一种FPGA远程配置在系留气球测控计算机中的应用方法,复用系统通信光纤、光端机、测控计算机板载PC104处理器,较好地解决了测控计算机远程调试的难题,动态重构技术的应用极大提高了系统的试验效率.     

通信信号模拟系统在复杂电磁环境中的应用

针对武器靶场对复杂电磁环境建设提出的迫切要求,论述了建设通信信号模拟系统的必要性,详细描述了系统的组成和功能,提出了结合使用软件无线电信号模拟技术、软总线控制技术和宽频段低杂散射频技术,构建时间-空间-频率多维体制通信信号模拟系统的方法。采用分布式体系结构达到灵活实现系统重构的目的,对通信信号模拟系统在复杂电磁环境模拟及靶场建设方面的典型应用进行了重点分析和设计。     

Dynamic survivable mapping through reconfiguration in IP over WDM network

A new approach for network survivability problem in Intemet protocol （IP） over wavelength division multiplexing （WDM） optical network is proposed to enhance the IP layer restorability under physical link failure through logical topology reconfiguration. More specifically, after traffic arrival and departure, reconfiguring the logical topology correspondingly is helpful to minimize the traffic disruption after physical link failure. So, in this paper, this problem is proposed for first time and formulated as an integer linear programming （ILP） problem. And then, two heuristic algorithms are proposed. The performance of proposed algorithms have been evaluated through simulations, and the results show that reconfiguring the logical topology dynamically could achieve more than 20% improvement of the restorability of traffic in IP layer, but with acceptable resource cost.     

可重构技术在相位式测距系统中的应用

介绍了基于可重构技术的某测距系统的设计方案，简要分析了相位式测距的原理，研究了可重构FPGA在系统中的应用方法。     

基于国产芯片的E1接口重构技术研究与实现

接入路由器中接入板的FPGA和CPU等关键元器件采用国产化芯片,控制数据和业务数据分布式协同处理,同时对板卡进行模块化设计,使得更改接口模块和加载不同程序实现设备的静态重构。采用两片FPGA既能弥补国产芯片性能的不足,也使得不同接入板数据处理模块易于隔离。介绍了接入板的整体设计思路、所要解决的问题和软硬件设计方案,并对CPU、FPGA和接口模块间的通道进行配置。经过测试,E1板卡能很好的完成数据的收发处理。     

配电网故障快速恢复方法

针对快速实现配电网故障恢复的问题,对智能配电网的故障、网络重构及故障恢复进行了分析。通过建立包含约束条件的配电网故障快速恢复数学模型,对网络拓扑搜索进行了研究。利用网络拓扑搜索与故障信息矩阵相结合的方法,解决了配电网故障定位问题。并就常见的35 kV永久配电故障,给出了35 kV电源故障快速恢复方案,针对解决方法进行了实际案例分析,验证了所提出方案的可靠性及有效性。     

一种改进信道化结构的宽带信号重构方法

数字信道化技术广泛用于宽带信号处理领域,传统的信道化结构由于信道数和抽取(内插)数相等,相邻信道存在混叠问题,对于跨信道信号接收、重构存在很大程度失真。提出一种改进的信道化结构,推导了相应的多相滤波高效算法,最后通过Matlab仿真验证该算法具有很好的改进效果。