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.
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2017, Vol. 45 
