A new composite assembly mechanism for supporting QoS in OBS networks

To provide the differential quality of service（QoS）for different classes of packets and reduce the packet loss probabil ity（PLP）,a novel priority-based composite assembly scheme for optical burst switching（OBS）networks is proposed The low and high packet classes are aggregated into a single burst simultaneously,and the highest-priority packets ar placed in the middle,while the low-priority packets are at the tail and head of the burst.The priority is lowered gradu ally from the middle to the ends.Simulation results demonstrate that the proposed assembly strategy not only guaran tees the integrity of the high-priority bursts,but also significantly reduces the average end-to-end delay of the burst and the PLP of network.So it can adapt to the flexible network with QoS requirement.     

基于DSP的红外搜索跟踪系统软件设计

针对双波段红外搜索跟踪系统任务需求,基于多核DSP的通用信号处理硬件平台,结合系统功能需求、算法需求及多核DSP硬件特征,设计了一种基于主从架构的多核DSP软件架构,并完成了搜索跟踪算法与应用软件的设计与实现,在红外搜索跟踪系统中进行了应用验证,试验证明,该技术可以满足系统对红外双波段图像任务功能的实时处理需求。     

基于国产FPGA的红外图像处理算法实现

随着国内政策与资源的倾斜,国产化芯片取得长足进步,但核心器件与高端芯片仍需在探索与应用中发展。现场可编程门阵列(FPGA)作为信号处理与数据传输的通用芯片需要大量应用,另一方面,因国产红外探测器存在盲元、闪元等无效像元,使盲闪元剔除成为红外机芯必要的图像处理算法。因此采用国产化的FPGA进行基于时空滤波的红外盲闪元实时检测算法的移植,对FPGA进行逻辑优化和时序约束,并通过片上RAM和片外DDR3分别进行数据缓存。经算法移植,红外图像缺陷像元被有效抑制,盲闪元率从5 ‰降为0.73 ‰,验证了在国产FPGA上实现算法移植的可行性,对促进我国自主可控的核心芯片的工程应用与推广具有深远意义。