A novel digital beamformer applied in vehicle mounted HF receiving device

Abstract

Abstract:In this work, a novel digital beamformer applied in vehicle-mounted high frequency (HF) receiving device has been developed. The system adopts robust superdirective beamforming algorithm, which not only effectively reduces the receiving array aperture but also maintains a higher directive gain compared with conventional beamforming method (CBF). The system is designed based on the idea of radio-defined software (SDR), which is easy to update. It contains 16 receiving channels and can output 3 analog beam signals. Experiment shows that the system has fast response and is feasible in engineering.

HF superdirective smart antenna system for interference suppression

“…the array element space is much less than half wavelength), which can achieve better directive gain than conventional methods [4,5]. However, practical array antennas always have certain amplitude and phase errors even after correction.…”

“…For a uniform circular array, we assume the steer vector of main lobe direction as að m ; ' m Þ, and the desired weight vector is assumed as w. The sensitivity factor K denotes as: where is the lagrange multiplier, which can be calculated in numeric method. Paper [5] introduces its hardware solution.…”

“…But under high-power interference environment, it can not afford enough inhibitory effect. In paper [5], a superdirective digital beamformer is designed. Its experiment results are based on hardware simulation, which is lack of field data verification.…”

A Set of Simple Numerical Pattern Synthesis Algorithms for Anti-Jamming With Superdirective Receiving Array

“…Zhang et al apply steering vector mismatch to model the uncertainty of a super-gain array. Most of these approaches can be classified as diagonalloading method [6][7][8][9][10]. Based on these theoretical contributions, superdirective arrays gradually enter engineering application stage.…”

Design and implementation of a smart antenna system for UHF vehicle-mounted communication

“…More importantly, the system realizes multi-objective distinguish and high accuracy direction-finding with a rapid response. Besides this, it implements a digital beamformer (DBF) [5] to obtain the output beam adjusted to the desired target. The final output communication signal both has higher gain and higher SINR.…”