KEYWORDS: Electromagnetism, Data modeling, Transmitters, Interpolation, Radio propagation, Matrices, Signal attenuation, Deep learning, Sensors, Modeling
The technique of electromagnetic spectrum map-ping enables the revelation of spatial distribution patterns within the electromagnetic environment. Precise visualization of the location information of electromagnetic spectrum signals contributes to enhancing spectrum utilization efficiency and system robustness. This technique finds wide applications in the fields of communication, navigation, radar, and other systems related to positioning and signal processing. It serves as a crucial means for modeling and simulating complex electromagnetic environments, playing a vital role in ensuring the accuracy and reliability of electromagnetic environment modeling and simulation. In this paper, we first introduce the technical background and knowledge related to electromagnetic spectrum mapping, analyzing the principles and current research status of electromagnetic spectrum mapping technology both domestically and internationally. Subsequently, we delve into a comprehensive analysis of high-precision electromagnetic spectrum mapping techniques based on sparse sampling, emphasizing potential solutions. Finally, we summarize the challenges and future directions faced by current electromagnetic spectrum mapping techniques, providing insights into their prospective trends and applications.
KEYWORDS: Antennas, Silicon carbide, Telecommunications, Distortion, Radio frequency circuits, Signal processing, Magnetism, Transceivers, Signal attenuation, Polarization
As an effective means to solve the problem of spectrum resource shortage, in-band full-duplex (IBFD) communication system can theoretically double the spectrum utilization rate and provide a new solution to the problems of hiding terminals, channel congestion and end-to-end delay. The self interference (SI) of IBFD directly affects the communication quality level. Due to the uncertainty in signal propagation process, SIC with complex process is the bottleneck of IBFD development. Therefore, how to eliminate self interference (SI) and apply it to engineering practice is a hot issue in future research. In this paper, SIC technologies are classified and studied. According to three SIC methods: Antenna-Domain SIC, Analog-Domain SIC and Digital-Domain SIC, the existing SIC technologies are compared and their advantages and disadvantages and shortcomings in practical application are discussed. Finally, the key research directions and application prospects of SIC are put forward.
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