CHEN Xin, LIU Zhen, WEI Xi-zhang. Ambiguity Resolving in Parameter Estimation of a Single Near-Field Source via Rotating Uniform Circular Array[J]. Acta Electronica Sinica, 2017, 45(3): 584-590.
CHEN Xin, LIU Zhen, WEI Xi-zhang. Ambiguity Resolving in Parameter Estimation of a Single Near-Field Source via Rotating Uniform Circular Array[J]. Acta Electronica Sinica, 2017, 45(3): 584-590. DOI: 10.3969/j.issn.0372-2112.2017.03.012.
Source localization with an array is an important topic for wireless communication
radar
sonar
etc.In order to resolve the phase ambiguity in parameter estimation of a single high frequency near-field source with uniform circular array (UCA)
a rotation-based algorithm is introduced to make the same sensor form virtual short base-line.First
a reference sensor is set at the center of UCA and its initial phase difference is utilized to compensate the measurements of other sensors
which are received before and after rotating UCA.Then
based on the phase difference of each sensor computed by correlation
the azimuth angle
elevation angle and range of the source can be estimated by least squares.Further
by using the obtained source parameters without ambiguity to eliminate the phase difference ambiguity of sensors with the longest base line before rotation
we can acquire more precise source parameters.Finally
the efficiency and performance of the method for a single high frequency source is verified by several simulations.