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Congratulations - An undergraduate of Grade 2018 in our school published an academic paper

Time:2021-01-21

Congratulations | An undergraduate of Grade 2018 in our school published an academic paper

Recently, the scientific researchachievement A centrosymmetric array comprising a horizontal uniform circular subarray and a vertical uniform linear subarray- its design in reference to its direction-finding Cramer-Rao bound of Yang Lin, an undergraduate of Grade 2018 majoring in Mechanical Engineering, under the guidance of Professor Wong, was accepted by IEEE Transactions on Aerospace and Electronic Engineering.

 

The co-first authors of the research results are Yang Lin and Kainam Thomas Wong, with Professor Wong as the corresponding author and Beijing University of Aeronautics and Astronautics (BUAA) as the first signatory unit. Yang Lin is responsible for deriving and analyzing the work, writing under the guidance of Professor Wong, and looking for key points that can be explored in depth.

 

Azimuth center symmetry is a key advantage of circular array of isotropic sensors with uniform spacing. This center symmetry can be maintained even if a vertical linear array is inserted at the center of the circle. This composite array, known as "vertical linear and circular split array" or "2.5-dimensional circular array", has been used for azimuth-elevation direction finding. The array grid not only maintains the circular symmetry of the coordinate origin, but also improves the spatial resolution of the polar / elevation angle. This improved pole / elevation resolution will be particularly useful in these actual acoustic scenarios: tracking objects in the air ( such as low-flying drones) or sound sources from high-rise buildings ( ubiquitous in Northeast Asia).

 

For such a "2.5-dimensional" array, "splitting" between the vertical linear uniformly spaced subarray and the horizontal circular uniformly spaced subarray, how should a given total number of sensors be allocated to minimize direction finding error? This question is analytically answered in this paper by means of the Cramer-Rob bound, which sets a lower bound on the error covariance of all unbiased estimators, and the statistical model of the given data ( that is, how the given observation data are statistically related to the parameters to be estimated).

 

Introduction to IEEE Transactions on Aerospace and Electronic Engineering

IEEE Transactions on Aerospace and Electronic Engineering are the TOP journals of the Chinese Academy of Sciences JCR Division 3 Engineering Technology Division, and the Electronic and Electrical-Aerospace Division 1 Journal, with an impact factor of 3.672 in 2019. The journal belongs to the Aeronautical and Electronic Systems Affairs of the Institute of Electrical and Electronics Engineers (IEEE). Focusing on the organization, design, development, integration and operation of complex systems in space, air, ocean or terrestrial environments, these systems include, but are not limited to, navigation, avionics, spacecraft, aerodynamics, radar, sonar, telemetry, defense, transportation, automated testing, and command and control.