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In an adaptive beamforming system, the mutual coupling effects among the array elements can seriously degrade the system performance. In this paper, we propose a robust adaptive beamforming algorithm using a uniform linear array (ULA) to mitigate the mutual coupling effects. The proposed algorithm is based on the fact that the mutual coupling matrix (MCM) of a ULA can be approximated as a banded symmetric...
Frequency diverse array (FDA) is a new antenna array concept. Different from phased-array which offers range-independent beampattern, FDA employs a small frequency increment across the antenna elements and yields a range-dependent beampattern. This enables the array beam to scan without the need of phase shifters or mechanical steering and provides potentials to suppress/detect range-dependent interferences/targets...
The problem of frequency estimation can be solved by parametric, non-parametric or semi-parametric methods. The representative nonparametric and semiparametric methods, namely, iterative adaptive approach (IAA) and sparse learning via iterative minimization (SLIM) have been recently proposed. Since both of them are not robust to impulsive noise, their extensions, ℓ1-IAA and ℓ1-SLIM are derived to...
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