随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流...随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流追踪、身份认证和室内定位等各个领域。由于目前广泛使用的个人移动设备并不支持RFID信息读取,限制了RFID技术的大范围应用。针对智能手机不能直接读取RFID标签信息的问题,提出一种利用用户预定义的基于RFID反射信号的手势特征实现面向智能手机和RFID标签之间的跨域互联方法。该方法不需要对部署的RFID系统或智能手机进行任何硬件修改,通过用户在感兴趣标签面前做出手势而产生的RFID相位特征,并与智能手机捕获到的运动传感器数据的相关时间戳进行匹配,从而实现了智能手机与RFID标签的关联配对。最后,通过实验验证了文中提出的跨域互联方法的可行性。展开更多
The use of global navigation satellite system signals reflected by the sea surface as a remote sensing tool has received considerable attention for over a decade. However, in signal detection processing, the direct-pa...The use of global navigation satellite system signals reflected by the sea surface as a remote sensing tool has received considerable attention for over a decade. However, in signal detection processing, the direct-path interference can potentially introduce a bigger obstacle to ocean surface detection than other interferences, such as clutter and radio signals. In order to improve retrieval of the ocean surface parameters, the direct-path interference signals have to be suppressed. The interference suppression based on the improved subspace projection algorithm is put forward in this paper. First of all, the interferential signal is acquired and tracked, then according to the acquired interferential signal parameter, the corresponding disturbance subspace is constructed. Finally, the interference is eliminated using the improved subspace block projection. This method can not only reduce the influence of interferential performance by the tracking error but also decrease computation greatly. It suits the changeable environment and the multi-data sample situation. The analysis of the simulated results has confirmed the validity of this method and provided a basis for the following system optimization design.展开更多
文摘随着物联网、人工智能等技术的飞速发展,基于物联网的“人-机-物”智能感知识别技术成为当前研究的热点方向。在众多的感知识别技术中,射频识别技术(Radio Frequency Identification, RFID)作为物联网的核心技术之一,被广泛应用在物流追踪、身份认证和室内定位等各个领域。由于目前广泛使用的个人移动设备并不支持RFID信息读取,限制了RFID技术的大范围应用。针对智能手机不能直接读取RFID标签信息的问题,提出一种利用用户预定义的基于RFID反射信号的手势特征实现面向智能手机和RFID标签之间的跨域互联方法。该方法不需要对部署的RFID系统或智能手机进行任何硬件修改,通过用户在感兴趣标签面前做出手势而产生的RFID相位特征,并与智能手机捕获到的运动传感器数据的相关时间戳进行匹配,从而实现了智能手机与RFID标签的关联配对。最后,通过实验验证了文中提出的跨域互联方法的可行性。
文摘The use of global navigation satellite system signals reflected by the sea surface as a remote sensing tool has received considerable attention for over a decade. However, in signal detection processing, the direct-path interference can potentially introduce a bigger obstacle to ocean surface detection than other interferences, such as clutter and radio signals. In order to improve retrieval of the ocean surface parameters, the direct-path interference signals have to be suppressed. The interference suppression based on the improved subspace projection algorithm is put forward in this paper. First of all, the interferential signal is acquired and tracked, then according to the acquired interferential signal parameter, the corresponding disturbance subspace is constructed. Finally, the interference is eliminated using the improved subspace block projection. This method can not only reduce the influence of interferential performance by the tracking error but also decrease computation greatly. It suits the changeable environment and the multi-data sample situation. The analysis of the simulated results has confirmed the validity of this method and provided a basis for the following system optimization design.
