There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable...There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable instruction set is an effective method to gain embedded system's re-configurability. This letter presents a logic module for Java processor to be capable of using programmable instruction set. Cost (area, power, and timing) of the module is trivial. Such module is also reusable for other embedded system solutions besides Java systems.展开更多
A memory and driving clock efficient design scheme to achieve WCDMA high-speed channel decoder on a single XILINX’ XVC1000E FPGA chip is presented. Using a modified MAP algorithm, say parallel Sliding Window logarith...A memory and driving clock efficient design scheme to achieve WCDMA high-speed channel decoder on a single XILINX’ XVC1000E FPGA chip is presented. Using a modified MAP algorithm, say parallel Sliding Window logarithmic Maximum A Posterior (PSW-log-MAP), the on-chip turbo decoder can decode an information bit by only an average of two clocks per iteration. On the other hand, a high-parallel pipeline Viterbi algorithm is adopted to realize the 256-state convolutional code decoding. The final decoder with an 8×chip-clock (30 72MHz) driving can concurrently process a data rate up to 2 5Mbps of turbo coded sequences and a data rate over 400kbps of convolutional codes. There is no extern memory needed. Test results show that the decoding performance is only 0 2～0 3dB or less lost comparing to float simulation.展开更多
针对风速风向检测仪应具有精度高、可靠性强、检测速度快、检测范围大等特点,设计基于可编程片上系统(System On a Programmable Chip,SOPC)技术的超声波风向风速检测系统.该系统以超声波探测器为风速风向检测传感器,建立超声波风速风...针对风速风向检测仪应具有精度高、可靠性强、检测速度快、检测范围大等特点,设计基于可编程片上系统(System On a Programmable Chip,SOPC)技术的超声波风向风速检测系统.该系统以超声波探测器为风速风向检测传感器,建立超声波风速风向检测算法,实现二维的风速风向检测.该系统对风速风向检测仪的发展具有参考意义.展开更多
基金Supported by the Guangzhou Key Technology R&D Program (No.2007Z2-D0011)
文摘There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable instruction set is an effective method to gain embedded system's re-configurability. This letter presents a logic module for Java processor to be capable of using programmable instruction set. Cost (area, power, and timing) of the module is trivial. Such module is also reusable for other embedded system solutions besides Java systems.
文摘A memory and driving clock efficient design scheme to achieve WCDMA high-speed channel decoder on a single XILINX’ XVC1000E FPGA chip is presented. Using a modified MAP algorithm, say parallel Sliding Window logarithmic Maximum A Posterior (PSW-log-MAP), the on-chip turbo decoder can decode an information bit by only an average of two clocks per iteration. On the other hand, a high-parallel pipeline Viterbi algorithm is adopted to realize the 256-state convolutional code decoding. The final decoder with an 8×chip-clock (30 72MHz) driving can concurrently process a data rate up to 2 5Mbps of turbo coded sequences and a data rate over 400kbps of convolutional codes. There is no extern memory needed. Test results show that the decoding performance is only 0 2～0 3dB or less lost comparing to float simulation.
文摘针对风速风向检测仪应具有精度高、可靠性强、检测速度快、检测范围大等特点,设计基于可编程片上系统(System On a Programmable Chip,SOPC)技术的超声波风向风速检测系统.该系统以超声波探测器为风速风向检测传感器,建立超声波风速风向检测算法,实现二维的风速风向检测.该系统对风速风向检测仪的发展具有参考意义.
