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高速自适应水声语音系统的设计与实现 被引量:3
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作者 党华 仲顺安 陈越洋 《北京理工大学学报》 EI CAS CSCD 北大核心 2009年第4期356-359,共4页
根据水声通信的复杂信道特性,设计了基于数字信号处理(DSP)的高速数字自适应多载波水声语音通信系统,采用MFSK调制技术、数据精确同步技术以及低噪PGA技术,有效地降低了误码率.通过对其关键技术的性能仿真和分析,以及在2 km长、1.5 m深... 根据水声通信的复杂信道特性,设计了基于数字信号处理(DSP)的高速数字自适应多载波水声语音通信系统,采用MFSK调制技术、数据精确同步技术以及低噪PGA技术,有效地降低了误码率.通过对其关键技术的性能仿真和分析,以及在2 km长、1.5 m深的恶劣环境中实测,该系统表现出很好的实时性和良好的语音恢复性能,传输距离大于2 km,误码率小于10-3. 展开更多
关键词 水声语音通信 多通道频移键控(MFSK) 数据精确同步 低噪程控增益放大器(PGA)
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Design and FPGA verification of a novel reliable real-time data transfer system 被引量:2
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作者 Yu-ping LIAN Yan HAN +2 位作者 Ming-xu HUO Jin-long CHEN Yan ZHANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第10期1406-1410,共5页
Considering the increasing use of information technology with established standards, such as TCP/IP and XML in modem industrial automation, we present a high cost performance solution with FPGA (field programmable ga... Considering the increasing use of information technology with established standards, such as TCP/IP and XML in modem industrial automation, we present a high cost performance solution with FPGA (field programmable gate array) implementation of a novel reliable real-time data transfer system based on EPA (Ethemet for plant automation) protocol and IEEE 1588 standard. This combination can provide more predictable and real-time communication between automation equipments and precise synchronization between devices. The designed EPA system has been verified on Xilinx Spartan3 XC3S1500 and it consumed 75% of the total slices. The experimental results show that the novel industrial control system achieves high synchronization precision and provides a 1.59-ps standard deviation between the master device and the slave ones. Such a real-time data transfer system is an excellent candidate for automation equipments which require precise synchronization based on Ethemet at a comparatively low price. 展开更多
关键词 Ethemet for plant automation (EPA) IEEE 1588 Precise synchronization Real-time data transfer
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