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Ultra-dense deployment of small cell networks is widely regarded as a key role to meet the increasing demand for huge capacity of wireless communication systems. Meanwhile, network densification will result in severe inter-cell interference and thus impair system performance. Traditional radio resource management schemes pay attention to interference mitigation through resource allocation in time,...
This paper proposes a novel polarization-based underlay spectrum sharing scheme in cognitive heterogeneous cellular network (CHCN). Distinguished from traditional spectrum sharing exploiting spectrum opportunities in time, frequency, space and power domains, we exploit spectrum opportunities in polarization domain to enable small cell to coexist with macrocell. The proposed scheme optimizes the transmitting...
Detection of pedestrian micro-motion can be applied into Public security field. With shorter wavelength in Terahertz(THz), target Doppler effect is more significant, and the penetration ability is stronger. Based on a line structure pedestrian model, this research compares the characteristics of smooth and rough pedestrian in microwave band(12GHz) and THz band(140GHz and 220GHz) with frequency analysis...
Modern interconnected power grid requires comprehensive and efficient on-line monitoring system to ensure the reliability and stability of the whole power system. This paper firstly introduces the structure and deficiency of traditional monitoring system. Then, relying on high precision operating parameters collected by Phase Measurement Unit (PMU), an improved on-line monitoring method is proposed,...
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