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Passive sources localization in the presence of strong interferences is generally a difficult problem. A sparse-representation-based adaptive interference suppression (SRAIS) method is proposed in this paper for interference suppression and bearing estimation, which can reduce the power loss of the TOI signal and have more accurate direction-of-arrival (DOA) estimation, especially when the input powers...
In order to obtain a reliable performance using the direction of arrival (DOA) techniques, a good estimation of the covariance matrix is required which is not possible in the presence of impulsive noise. An efficient nonlinear DOA estimation method based on robust statistics is developed for a CDMA receiver to mitigate impulsive noise effects in multipath environments. The proposed scheme is derived...
In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources is first estimated based on the use of a transformation matrix to eliminate the uncorrelated interferers. Then the optimum beamforming is performed based on the estimated...
Linear and planar adaptive antennas have been explored since last few decades for employing tailor made multiple beams for synthetic aperture radar applications. DSP implementation of standard beam forming algorithms for space borne synthetic aperture radar processing is discussed here in this paper. A planar adaptive array can be exploited to generate multiple simultaneous beams to cater synthetic...
By applying smart beamforming technologies, it is effective to protect primary user (PU) while guarantee that cognitive user (CU) has better spectrum sharing with PU in a rarely conflictual manner. In this paper, firstly, we implement direction of arrival (DOA) estimation for obtaining the location information of signals, then exploit uniform circular array antenna applying adaptive algorithm to achieve...
Estimation of the incident waveform directions, or direction of arrival (DOA) estimation, is an essential problem in sonar array processing. A sonar array usually consists of a large number of elements, and the associated data processing complexity is extensive. An approach to reduce the computation is to map the data from full-dimension element space into a lower dimension beam space, through a linear...
A novel robust beamformer is proposed to suppress the coherent interferences while maintaining a distortionless response for the desired signal with direction-of-arrival (DOA) estimation errors. By dividing the received array data vector into two sub-vectors and subtracting one sub-vector from the other, a new data vector is obtained, based on which a set of constraints is formed for calculating the...
Based on MUSIC (MUltiple SIgnal Classification) algorithm and CSM (Coherent Signal- subspace Method), a DOA estimation method of wideband signals has been proposed in this paper. At first, the output covariance matrix is formed based on the fourth-order cumulants using the relation between the fourth-order and the covariance. And then using the projector operator to form focusing matrix and estimate...
In this paper, the configuration of 3D (three dimension) location algorithm based on spherical smart antenna array with MUSIC (the multiple signal classification) DOA (Direction of Arrival) estimates is proposed to realize 3D location estimation for future mobile system. By this algorithm, the 3D location advantage gained by MUSIC DOA estimates with cross virtual line array can be achieved, because...
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