3 papers
eess.SP2025
Expectation Propagation-Based Signal Detection for Highly Correlated MIMO Systems
Kabuto Arai, Takumi Yoshida, Takumi Takahashi +1
Large-scale multiple-input-multiple-output (MIMO) systems typically operate in dense array deployments with limited scattering environments, leading to highly correlated and ill-co…
eess.SP2025
Joint Pilot Allocation and Sequence Design for MIMO-OFDM Systems With Channel Sparsity
Kabuto Arai, Koji Ishibashi, Hiroki Iimori +3
This paper proposes a joint optimization of pilot subcarrier allocation and non-orthogonal sequence for multiple-input-multiple-output (MIMO)-orthogonal frequency-division multiple…
eess.SP2024
Channel Estimation for Hybrid MIMO Systems With Array Model Errors and Beam Squint Effects
Kabuto Arai, Koji Ishibashi
This paper proposes a channel estimation method for hybrid wideband multiple-input-multiple-output (MIMO) systems in high-frequency bands, including millimeter-wave (mmWave) and su…