1 research outputs found
A Novel Blind Adaptive Beamformer with Robustness against Mutual Coupling and Miscalibration Effects
Beamforming techniques utilized either at the transmitter or the receiver
terminals have achieved superior quality-of-service performances from both the
multi-antenna wireless communications systems, communications intelligence and
radar target detection perspectives. Despite the overwhelming advantages in
ideal operating conditions, beamforming approaches have been shown to face
substantial performance degradations due to unknown mutual coupling effects and
miscalibrated array elements. As a promising solution, blind beamformers have
been proposed as a class of receiver beamformers that do not require a
reference signal to operate. In this paper, a novel gradient-based blind
beamformer is introduced with the aim of mitigating the deteriorating effects
of unknown mutual coupling or miscalibration effects. The proposed approach is
shown to find the optimal weights in different antenna array configurations in
the presence of several unknown imperfections (e.g., mutual coupling effects,
miscalibration effects due to gain and phase variations, inaccurate antenna
positions). By providing numerical results related to the proposed algorithm
for different array configurations, and bench-marking with the other existing
approaches, the proposed scheme has been shown to achieve superior performance
in many aspects. Additionally, a measurement-based analysis has been included
with validation purposes.Comment: Presented in EuCAP 2023, Copyright IEE