KEYWORDS: Pulse signals, Signal to noise ratio, Receivers, Telecommunications, Signal detection, Mining, Wireless communications, Signal processing, Modulation, Integrated circuits
Addressing signal attenuation and multipath interference challenges in underground mine communications, an innovative Impulse Radio Ultra-Wideband (IR-UWB) communication system is introduced in this paper. Four narrow pulse signals with distinct pulse positions are employed by this system to facilitate multiple access and secure transmission. Furthermore, a sampling integration circuit based on equivalent time sampling is utilized for parallel reception, to enhance signal reception performance and communication rate in low signal-to-noise ratio (SNR) environments. The simulation results show that the system maintains a bit error rate of no more than 10^-1 under SNR conditions ranging from -20dB to 5 dB. Furthermore, its transmission rate is improved by several times compared to traditional single-channel transceiver systems. This provides a low complexity and effective solution for underground mine communications.
Earthquake disasters have had an important impact on people's lives and economy. As the national department for comprehensive response to various disasters, the Emergency Management Department has done a lot of work for earthquake relief. On the basis of the original earthquake disaster rescue and relief, the Emergency Management Department carried out comprehensive rescue and relief work by integrating monitoring and early warning, dispatching and command, analysis, research and judgment, and fire rescue. The Internet of Things, artificial intelligence, video conference, navigation and other means are used to carry out comprehensive rescue and relief work. This paper analyzes the advantages and disadvantages of the comprehensive dispatching system of earthquake relief at the national level, and looks forward to the comprehensive dispatching work of earthquake relief at the national level.
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