High sidelobe level is a major disadvantage of the Capon beamforming. To suppress the sidelobe, this paper introduces a mainlobe to sidelobe power ratio constraint to the Capon beamforming. it minimizes the sidelobe power while keeping the mainlobe power constant. Simulations show that the obtained beamformer outperforms the Capon beamformer. Index Terms array signal proccessing, Capon beamform...

A modification of the classic Dolph-Chebyshev low sidelobe array pattern design is introduced, which allows the adjustment of the mainlobe’s width relatively freely and independently from the sidelobe level. In order to illustrate the advantages of the tool provided by the new design method, its application to Uniform Linear Arrays (ULA’s) and Uniform Circular Arrays (UCA’s) is discussed. It is...

Applying a sparse constraint on the beam pattern has been suggested to suppress the sidelobe of the minimum variance distortionless response (MVDR) beamformer recently. To further improve the performance, we add a mixed norm constraint on the beam pattern. It matches the beam pattern better and encourages dense distribution in mainlobe and sparse distribution in sidelobe. The obtained beamforme...

Out-band radiation is a severe problem for Cognitive Radio with OFDM system (CR-OFDM) which is caused by the sidelobe of OFDM signals. Lots of studies have been done on suppressing the sidelobe power and numerous methods have been proposed. In this paper, we propose a novel method to minimize the sidelobe by adding extended data carrier so called EDC to the original data carriers so as to prote...

Abstruct-The effects of measurement distance in distorting low sidelobe difference patterns are examined; this is a sequel to a paper on low sidelobe sum pattern effects. Previous calculations have used obsolete suboptimum aperture distributions. The Bayliss linear distribution is a versatile highly efficient and robust optimum distribution; its use here allows a single curve of sidelobe measur...

A method is presented which optimizes weights of general planar 1D and 2D symmetric full and sparse arrays. The objective is to nd a weighting of the array elements which gives the minimum sidelobe level of the array pattern in a speci ed region the stopband. The sidelobe level is controlled on a discrete set of points from this region. The method minimizes the Chebyshev norm of the sidelobe le...

The element failure of antenna arrays increases the sidelobe power level. In this paper, the problem of antenna array failure has been addressed using Firefly Algorithm (FA) by controlling only the amplitude excitation of array elements. A fitness function has been formulated to obtain the error between pre-failed (original) sidelobe pattern and measured sidelobe pattern and this function has b...

The element failure of antenna arrays increases the sidelobe power level. In this paper, the problem of antenna array failure has been addressed using Firefly Algorithm (FA) by controlling only the amplitude excitation of array elements. A fitness function has been formulated to obtain the error between pre-failed (original) sidelobe pattern and measured sidelobe pattern and this function has b...

Matchedeld beamforming has been proposed for localizing wideband acoustic sources in uncertain underwater channels. While adaptive matchedeld beamforming provides adequate sidelobe suppression for stronger sources, at low signal-to-noise ratios it converges to its quiescent response, in this case the Bartlett beamformer, which has unacceptably high sidelobe levels. In this paper, a design metho...

High sidelobe level and direction of arrival (DOA) estimation sensitivity are two major disadvantages of the Capon beamforming. To deal with these problems, this paper gives an overview of a series of robust Capon beamforming methods via shaping beam pattern, including sparse Capon beamforming, weighted sparse Capon beamforming, mixed norm based Capon beamforming, total variation minimization b...