Robust wideband beamforming method for linear frequency modulation signals based on digital dechirp processing

Doubly Covariance Matrix Reconstruction Based Blind Beamforming for Coherent Signals

“…. , Q 1 , σ 2 Iq is comparable to the desired signal power σ 2 s ) and Q − Q 1 normal interferences (i.e., for…”

“…Since the peaks formed by noise are far lower than the peaks corresponding to real interferences in the spectrum [27], it is applicable to set a threshold to choose the peaks of real interferences and determine the number of interferences Q. Considering the fact that there are M channels in the receiver array, the value of threshold can be set asσ 2 n /M. If the value of the peak is lower thanσ 2 n /M, it is considered as a non-interfering peak and removed.…”

“…Considering the fact that there are M channels in the receiver array, the value of threshold can be set asσ 2 n /M. If the value of the peak is lower thanσ 2 n /M, it is considered as a non-interfering peak and removed. After the selection, the remaining peaks contain both normal and CDSP interferences.…”

“…Adaptive beamforming is a well concerned research topic of array signal processing, with wide spread applications in radar, sonar signal processing and other fields [1][2][3][4][5][6]. Traditional beamforming mainly depends on the prior information about the array manifold and desired signals to form a sharper beam for the suppression of interferences and noise [7,8].…”

Decoupled narrowband robust adaptive beamforming based on the ADMM in a noisy channel

“…To deal with these problems, many robust beamformers have been presented in recent years. These beamformers can be divided into the following categories: the diagonal loading (DL) methods [2–9], the eigenspace‐based methods [10–14], the sparse reconstruction methods [15–18], and the INCM reconstruction‐based [19–23] methods.…”