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In this paper, a novel blind mutual coupling compensation algorithm especially tailored to L-shaped array(simplified as LCAC) is proposed. This method exploits the incident signals to carry out both 2-Dimensional(2-D) direction of arrival estimation and mutual coupling calibration simultaneously. Based on the banded symmetric Toeplitz structure of coupling matrix between sensors in each sub array...
This paper addresses a new method based on spatial correlation matrix to calibrate uniform linear array for HF Surface Wave Radar (HFSWR). Strong point echoes, such as target, clutter, transponder and so on, which are highly spatial correlated, can be used to structure spatial correlation matrix. And the matrix contains angles of echoes and phase errors information. In this paper, we use two-dimension...
A novel gain and phase blind calibration method for a linear array with non-Gaussian sources is proposed. In the proposed method, independent component analysis is used to estimate the product of the array error matrix and the array response matrix. From this estimated matrix, the array gain and phase are estimated in the sense that the squared estimation error of the direction of arrivals (DOAs)...
Calibration of receiving antenna arrays generally yields a square coupling matrix characterizing the array response. It is demonstrated in this paper that in the presence of strong structure scattering, the array response is better described by a non-square coupling matrix. Therefore, the calibration procedure must account for these new matrix dimensions. The different approaches providing accurate...
We propose a joint multi-camera calibration algorithm based on iterative factorization of the measurement matrix. The matrix is composed of homographies between the model plane and its images. Rescaling and decomposition of the measurement matrix are implemented with series of 3D reconstruction techniques. Since these techniques deal well with the missing data, the model plane disposed in the calibration...
A self-calibration algorithm (SAL: self-calibration algorithm for L-shaped array) is presented for L-shaped array in the presence of mutual coupling. The proposed algorithm utilizes special mutual coupling characteristic of L-shaped array to decouple the signal source information (DOA) and coupling coefficients of antenna array so that two kinds of parameter estimations can be realized without any...
Smart antenna technology can significantly improve the coverage radius, increase channel capacity, reduce transmitting power as well as overcome multipath effects by adaptive beamforming. The performance of digital beamforming is greatly affected by the amplitude-phase inconsistency among the channels. We propose a method of calibrating amplitude-phase errors of RF channels of DBF transmitting antenna...
In this paper, the indirect X-ray-detector panel using an array of digital camera with an intensifying screen is designed. To assist the orientation process, the camera calibration was used to derive the information of how the individual camera is oriented. Salt & pepper noise was removed by the median filtering technique. The border of captured image was transformed and registered by using the...
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