在对TigerSHARC芯片上自带的Link口通信协议进行研究的基础上,提出其在FPGA上实现的方法,并编写了代码在ALTERA公司的STRATIX II FPGA EP2S60F672I4进行了工程实现,测试结果表明:在FPGA上实现的Link口传输速度可达500MB/s,且能够与Tiger...在对TigerSHARC芯片上自带的Link口通信协议进行研究的基础上,提出其在FPGA上实现的方法,并编写了代码在ALTERA公司的STRATIX II FPGA EP2S60F672I4进行了工程实现,测试结果表明:在FPGA上实现的Link口传输速度可达500MB/s,且能够与Tiger-SHARC自带的Link口完全兼容,该Link口在FPGA上的实现为TigerSHARC与FPGA之间的互联提供了一种新的框架结构,具有一定的实用和推广价值。展开更多
针对信道资源有限的高级数据链路控制(High Level Data Link Control,HDLC)通信,提出了一种零开销的带内管控技术。该技术采用输入输出异步缓存、高频管控帧插入、高可靠管控帧提取的方式,构建带内管控数据通道,实现了对HDLC帧数据的零...针对信道资源有限的高级数据链路控制(High Level Data Link Control,HDLC)通信,提出了一种零开销的带内管控技术。该技术采用输入输出异步缓存、高频管控帧插入、高可靠管控帧提取的方式,构建带内管控数据通道,实现了对HDLC帧数据的零开销管控。该技术可有效解决HDLC帧端到端满带宽通信情况下,零开销带内管控的设计难点。最后,给出了基于现场可编辑逻辑门阵列(Field Programmable Gate Array,FPGA)的实现方案和功能仿真验证结果。展开更多
The transmission of scientific data over long distances is required to enable interplanetary science expeditions. Current approaches include transmitting all collected data or transmitting low resolution data to enabl...The transmission of scientific data over long distances is required to enable interplanetary science expeditions. Current approaches include transmitting all collected data or transmitting low resolution data to enable ground controller review and selection of data for transmission. Model-based data transmission (MBDT) seeks to increase the amount of knowledge conveyed per unit of data transmitted by comparing high-resolution data collected in situ to a pre-existing (or potentially co-transmitted) model. This paper describes the application of MBDT to gravitational data and characterizes its utility and performance. This is performed by applying the MBDT technique to a selection of gravitational data previously collected for the Earth and comparing the transmission requirements to the level required for raw data transmis-sion and non-application-aware compression. Levels of transmission reduction up to 31.8% (without the use maximum-error-thresholding) and up to 97.17% (with the use of maximum-error-thresholding) resulted. These levels significantly exceed what is possible with non-application-aware compression.展开更多
文摘在对TigerSHARC芯片上自带的Link口通信协议进行研究的基础上,提出其在FPGA上实现的方法,并编写了代码在ALTERA公司的STRATIX II FPGA EP2S60F672I4进行了工程实现,测试结果表明:在FPGA上实现的Link口传输速度可达500MB/s,且能够与Tiger-SHARC自带的Link口完全兼容,该Link口在FPGA上的实现为TigerSHARC与FPGA之间的互联提供了一种新的框架结构,具有一定的实用和推广价值。
文摘针对信道资源有限的高级数据链路控制(High Level Data Link Control,HDLC)通信,提出了一种零开销的带内管控技术。该技术采用输入输出异步缓存、高频管控帧插入、高可靠管控帧提取的方式,构建带内管控数据通道,实现了对HDLC帧数据的零开销管控。该技术可有效解决HDLC帧端到端满带宽通信情况下,零开销带内管控的设计难点。最后,给出了基于现场可编辑逻辑门阵列(Field Programmable Gate Array,FPGA)的实现方案和功能仿真验证结果。
文摘The transmission of scientific data over long distances is required to enable interplanetary science expeditions. Current approaches include transmitting all collected data or transmitting low resolution data to enable ground controller review and selection of data for transmission. Model-based data transmission (MBDT) seeks to increase the amount of knowledge conveyed per unit of data transmitted by comparing high-resolution data collected in situ to a pre-existing (or potentially co-transmitted) model. This paper describes the application of MBDT to gravitational data and characterizes its utility and performance. This is performed by applying the MBDT technique to a selection of gravitational data previously collected for the Earth and comparing the transmission requirements to the level required for raw data transmis-sion and non-application-aware compression. Levels of transmission reduction up to 31.8% (without the use maximum-error-thresholding) and up to 97.17% (with the use of maximum-error-thresholding) resulted. These levels significantly exceed what is possible with non-application-aware compression.
