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基于ARM+FPGA的相位平滑伪距差分定位方法 被引量:2
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作者 温泉源 纪元法 +1 位作者 孙希延 符强 《河南师范大学学报(自然科学版)》 CAS 北大核心 2016年第4期63-68,共6页
为了满足用户更高的定位精度要求,研究了载波相位平滑伪距差分定位方法.根据差分定位原理,基于MATLAB平台自主编制了差分解算软件,兼容北斗和GPS伪距差分定位;基于ARM+FPGA平台的接收机实现了相位平滑伪距差分定位.实验结果表明,零基线... 为了满足用户更高的定位精度要求,研究了载波相位平滑伪距差分定位方法.根据差分定位原理,基于MATLAB平台自主编制了差分解算软件,兼容北斗和GPS伪距差分定位;基于ARM+FPGA平台的接收机实现了相位平滑伪距差分定位.实验结果表明,零基线条件下,相位平滑伪距差分算法定位精度可由标准定位的米级水平提高到亚米级,性能稳定.基线距离增大,定位精度随之降低,误差在±4m内,差分讯龄和定位精度成正比关系. 展开更多
关键词 北斗系统 伪距差分 基线 讯龄 ARM+FPGA 载波相位平滑
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Monitoring Biosignals with Low Cost Wearable Sensors
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作者 Filipe Oliveira1 Gil Goncalves Raquel Sousa 《Computer Technology and Application》 2013年第6期323-326,共4页
With the increase of aging population, we have been witnessing a decline in the quality of life influenced by numerous social, cultural and economic factors. Several studies have addressed these facts and some emergin... With the increase of aging population, we have been witnessing a decline in the quality of life influenced by numerous social, cultural and economic factors. Several studies have addressed these facts and some emerging technologies are capable of monitoring and anticipating these problems. With the advance in the development of smart textiles, it's possible to use these technologies in the acquisition of biosignals, which allows obtaining a better comfort regarding the use of smart clothes over traditional Ag/AgCI electrodes. In this way, it is possible to monitor for longer periods reducing the discomfort to the user. This paper reports the development of a low cost sensor with the capability of monitoring the electrical activity of the heart, measuring the heart rate and body temperature and is applied in the scenario: health & wellbeing, targeting the continuous measurement of vital signs. 展开更多
关键词 ECG (electrocardiogram) monitoring heart rate smart textile electrodes Ag/AgCI biosignals continuous monitoring.
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