The proposed Doppler measurement technique shows that the Doppler measurements can be accomplished by a single pulse with multiple frequency components through optical fibre delay lines.Range and velocity ambiguity ca...The proposed Doppler measurement technique shows that the Doppler measurements can be accomplished by a single pulse with multiple frequency components through optical fibre delay lines.Range and velocity ambiguity can be removed,and the velocity resolution can be improved dramatically by using long optical fibre delay lines.Furthermore,the velocity resolution can be modified by adjusting the length of optical fibre delay lines.In addition,the proposed radar can achieve high range resolution by using a single wideband pulse.As a result,the new approach can improve radar performance significantly.展开更多
高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),...高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),实现电力系统中人与物、物与物、人与人之间随时随地通信。首先介绍了UPIoT的发展背景与基本概念、主要的低功耗广域网络(Low Power Wide Area Network, LPWAN)技术,然后以LoRa物联网解决方案为例介绍了基于LPWAN的UPIoT的体系架构及性能。最后探讨了UPIoT的应用前景,并指出了UPIoT需重点研究和解决的两个特殊问题,即:低压电力线载波通信(PLC)和强电磁干扰环境下的信号处理。展开更多
文摘The proposed Doppler measurement technique shows that the Doppler measurements can be accomplished by a single pulse with multiple frequency components through optical fibre delay lines.Range and velocity ambiguity can be removed,and the velocity resolution can be improved dramatically by using long optical fibre delay lines.Furthermore,the velocity resolution can be modified by adjusting the length of optical fibre delay lines.In addition,the proposed radar can achieve high range resolution by using a single wideband pulse.As a result,the new approach can improve radar performance significantly.
文摘高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),实现电力系统中人与物、物与物、人与人之间随时随地通信。首先介绍了UPIoT的发展背景与基本概念、主要的低功耗广域网络(Low Power Wide Area Network, LPWAN)技术,然后以LoRa物联网解决方案为例介绍了基于LPWAN的UPIoT的体系架构及性能。最后探讨了UPIoT的应用前景,并指出了UPIoT需重点研究和解决的两个特殊问题,即:低压电力线载波通信(PLC)和强电磁干扰环境下的信号处理。
