物理下行控制信道(Physical Downlink Control Channel,PDCCH)承载着一个或多个终端的下行控制信息(DCI),UE通过解析DCI来得知用于PUSCH/PDSCH(物理上行共享信道/物理下行共享信道)传输的相关控制信息。提出了一种当UE被高层设置为用小...物理下行控制信道(Physical Downlink Control Channel,PDCCH)承载着一个或多个终端的下行控制信息(DCI),UE通过解析DCI来得知用于PUSCH/PDSCH(物理上行共享信道/物理下行共享信道)传输的相关控制信息。提出了一种当UE被高层设置为用小区无线网络临时标识C-RNTI加扰的CRC进行PDCCH解码时,UE根据传输模式来确定DCI格式候选集合,进而盲检测DCI格式及确定PDSCH传输方案的DSP实现方法,该方法已经在TMS320C64x DSP中实现。将该方案应用于TDLTE射频一致性测试系统的开发中,实际运行验证了该方案的可行性、高效性。展开更多
We developed a monochromatic crystal backlight imaging system for the double-cone ignition(DCI) scheme, employing a spherically bent quartz crystal. This system was used to measure the spatial distribution and tempora...We developed a monochromatic crystal backlight imaging system for the double-cone ignition(DCI) scheme, employing a spherically bent quartz crystal. This system was used to measure the spatial distribution and temporal evolution of the head-on colliding plasma from the two compressing cones in the DCI experiments. The influence of laser parameters on the x-ray backlighter intensity and spatial resolution of the imaging system was investigated. The imaging system had a spatial resolution of 10 μm when employing a CCD detector. Experiments demonstrated that the system can obtain time-resolved radiographic images with high quality, enabling the precise measurement of the shape, size, and density distribution of the plasma.展开更多
In the double-cone ignition schemes(DCIS), the deuterium–tritium target shell is ablated and compressed by a highpower nanosecond laser in Au-cones to generate plasmas. Under the actions of spherically symmetric comp...In the double-cone ignition schemes(DCIS), the deuterium–tritium target shell is ablated and compressed by a highpower nanosecond laser in Au-cones to generate plasmas. Under the actions of spherically symmetric compression and acceleration along the Au cone, they will be ejected out of the cone mouth and collide with each other. The plasmas experience conversion from kinetic energy to internal energy at the vertex of the geometric center of two Au cones that are symmetric to each other, because of which high-density fusion plasmas are preheated. This key physical process has undergone experimental verification on the Shenguang-II upgraded facility in China. Apparently, the improvement and optimization of the velocity of plasmas in hypersonic jet flow at the cone mouth are crucial for the success of the DCIS. In the DCIR7 experiment of the Shenguang-II upgraded facility, a velocity yield of approximately 130–260 km/s was achieved for the plasmas at the cone mouth, with a result of nearly 300 km/s based on numerical simulation. In this paper, theoretical analysis is performed as regards the process, in which target shells are ablated and compressed by laser to generate highvelocity plasmas ejected through jet flow. Based on this analysis, the formula for the velocity of plasmas in supersonic jet flow at the cone mouth is proposed. This study also provides measures that are more effective for improving the kinetic energy of plasmas and optimizing energy conversion efficiency, which can serve as theoretical references for the adjustment and optimization of processes in subsequent experiments.展开更多
在飞机级高强辐射场(High-intensity radiated fields,HIRF)试验中,直接电流注入(Direct current injection,DCI)法是一种用于在低频段替代辐射场照射法的试验方法。根据两种试验方法在电缆端口上电流响应结果的等价性,通过传递函数建...在飞机级高强辐射场(High-intensity radiated fields,HIRF)试验中,直接电流注入(Direct current injection,DCI)法是一种用于在低频段替代辐射场照射法的试验方法。根据两种试验方法在电缆端口上电流响应结果的等价性,通过传递函数建立了辐射场场强与直接注入电流间的关系式。在此基础上,采用数值仿真的方法模拟计算了一个机体模型内部各电缆端口上的电流传递函数,并进一步确定了DCI法所需的注入电流值。该方法对于飞机级HIRF试验的开展具有重要的指导意义。展开更多
以符合数字影院DCI规范的数字电影视频解压卡的驱动程序设计为例,介绍了使用微软公司的DDK和Compuware公司的DriverWorks开发PCI设备WDM驱动程序的方法。包括DriverWorks中PCI设备WDM驱动程序的架构,对于不同类型IO请求的不同处理方法,...以符合数字影院DCI规范的数字电影视频解压卡的驱动程序设计为例,介绍了使用微软公司的DDK和Compuware公司的DriverWorks开发PCI设备WDM驱动程序的方法。包括DriverWorks中PCI设备WDM驱动程序的架构,对于不同类型IO请求的不同处理方法,DMA的过程以及DMA线程之间的同步,以及将驱动程序从单CPU计算机系统移植到多CPU计算机系统的设计要点。实验结果表明,驱动程序能够控制数字电影视频解压卡对符合DCI规范的视频码流进行实时解码,该视频码流速率可以达到DCI规范给出的最大值(250 M Bits/sec)。展开更多
基金The National Key R&D Program of China(No.2022YFC38010000)the Key Research&Development Plan of Jiangsu Province(No.BE2020084-2)the Fundamental Research Funds for the Central Universities(No.2242022k60001).
文摘物理下行控制信道(Physical Downlink Control Channel,PDCCH)承载着一个或多个终端的下行控制信息(DCI),UE通过解析DCI来得知用于PUSCH/PDSCH(物理上行共享信道/物理下行共享信道)传输的相关控制信息。提出了一种当UE被高层设置为用小区无线网络临时标识C-RNTI加扰的CRC进行PDCCH解码时,UE根据传输模式来确定DCI格式候选集合,进而盲检测DCI格式及确定PDSCH传输方案的DSP实现方法,该方法已经在TMS320C64x DSP中实现。将该方案应用于TDLTE射频一致性测试系统的开发中,实际运行验证了该方案的可行性、高效性。
基金Project supported by the staff of the Shenguang-Ⅱ upgrade Laser facilityThis study was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDA25010100,XDA25010300,XDA25030100,XDA25030200,and XDA25051000)+2 种基金the National Natural Science Foundation of China(Grant Nos.11827807 and 12105359)the Open Foundation of Key Laboratory of High Power Laser and Physics of Chinese Academy of Sciences(Grant No.SGKF202105)the Chinese Academy of Sciences Youth Interdisciplinary Team(Grant No.JCTD-2022-05).
文摘We developed a monochromatic crystal backlight imaging system for the double-cone ignition(DCI) scheme, employing a spherically bent quartz crystal. This system was used to measure the spatial distribution and temporal evolution of the head-on colliding plasma from the two compressing cones in the DCI experiments. The influence of laser parameters on the x-ray backlighter intensity and spatial resolution of the imaging system was investigated. The imaging system had a spatial resolution of 10 μm when employing a CCD detector. Experiments demonstrated that the system can obtain time-resolved radiographic images with high quality, enabling the precise measurement of the shape, size, and density distribution of the plasma.
基金Project supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDA25051000 and XDA 25010100)。
文摘In the double-cone ignition schemes(DCIS), the deuterium–tritium target shell is ablated and compressed by a highpower nanosecond laser in Au-cones to generate plasmas. Under the actions of spherically symmetric compression and acceleration along the Au cone, they will be ejected out of the cone mouth and collide with each other. The plasmas experience conversion from kinetic energy to internal energy at the vertex of the geometric center of two Au cones that are symmetric to each other, because of which high-density fusion plasmas are preheated. This key physical process has undergone experimental verification on the Shenguang-II upgraded facility in China. Apparently, the improvement and optimization of the velocity of plasmas in hypersonic jet flow at the cone mouth are crucial for the success of the DCIS. In the DCIR7 experiment of the Shenguang-II upgraded facility, a velocity yield of approximately 130–260 km/s was achieved for the plasmas at the cone mouth, with a result of nearly 300 km/s based on numerical simulation. In this paper, theoretical analysis is performed as regards the process, in which target shells are ablated and compressed by laser to generate highvelocity plasmas ejected through jet flow. Based on this analysis, the formula for the velocity of plasmas in supersonic jet flow at the cone mouth is proposed. This study also provides measures that are more effective for improving the kinetic energy of plasmas and optimizing energy conversion efficiency, which can serve as theoretical references for the adjustment and optimization of processes in subsequent experiments.
文摘在飞机级高强辐射场(High-intensity radiated fields,HIRF)试验中,直接电流注入(Direct current injection,DCI)法是一种用于在低频段替代辐射场照射法的试验方法。根据两种试验方法在电缆端口上电流响应结果的等价性,通过传递函数建立了辐射场场强与直接注入电流间的关系式。在此基础上,采用数值仿真的方法模拟计算了一个机体模型内部各电缆端口上的电流传递函数,并进一步确定了DCI法所需的注入电流值。该方法对于飞机级HIRF试验的开展具有重要的指导意义。
文摘以符合数字影院DCI规范的数字电影视频解压卡的驱动程序设计为例,介绍了使用微软公司的DDK和Compuware公司的DriverWorks开发PCI设备WDM驱动程序的方法。包括DriverWorks中PCI设备WDM驱动程序的架构,对于不同类型IO请求的不同处理方法,DMA的过程以及DMA线程之间的同步,以及将驱动程序从单CPU计算机系统移植到多CPU计算机系统的设计要点。实验结果表明,驱动程序能够控制数字电影视频解压卡对符合DCI规范的视频码流进行实时解码,该视频码流速率可以达到DCI规范给出的最大值(250 M Bits/sec)。
