Photonic crystal slow light devices fabricated by CMOS-compatible process. - Toshihiko Baba; Hong C. Nguyen; Norihiro Ishikura; Keijiro Suzuki; Mizuki Shinkawa; Ryo Hayakawa; Keisuke Kondo (IEICE Electron. Express, 2013)

An overloaded MIMO signal detection scheme with slab decoding and lattice reduction. - Ryo Hayakawa; Kazunori Hayashi; Megumi Kaneko (APCC, 2015)

Massive overloaded MIMO signal detection via convex optimization with proximal splitting. - Ryo Hayakawa; Kazunori Hayashi; Hampei Sasahara; Masaaki Nagahara (EUSIPCO, 2016)

Error recovery with relaxed MAP estimation for massive MIMO signal detection. - Ryo Hayakawa; Kazunori Hayashi (ISITA, 2016)

Lattice Reduction-Aided Detection for Overloaded MIMO Using Slab Decoding. - Ryo Hayakawa; Kazunori Hayashi; Megumi Kaneko (IEICE Trans. Commun., 2016)

Binary vector reconstruction via discreteness-aware approximate message passing. - Ryo Hayakawa; Kazunori Hayashi (APSIPA, 2017)

Discreteness-aware AMP for reconstruction of symmetrically distributed discrete variables. - Ryo Hayakawa; Kazunori Hayashi (SPAWC, 2017)

Error Recovery for Massive MIMO Signal Detection via Reconstruction of Discrete-Valued Sparse Vector. - Ryo Hayakawa; Kazunori Hayashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

Convex Optimization-Based Signal Detection for Massive Overloaded MIMO Systems. - Ryo Hayakawa; Kazunori Hayashi (IEEE Trans. Wirel. Commun., 2017)

Uplink Overloaded MU-MIMO OFDM Signal Detection Methods using Convex Optimization. - Kazunori Hayashi; Ayano Nakai; Ryo Hayakawa; Sangseok Ha (APSIPA, 2018)

Distributed Approximate Message Passing with Summation Propagation. - Ryo Hayakawa; Ayano Nakai; Kazunori Hayashi (ICASSP, 2018)

Reconstruction of Complex Discrete-Valued Vector via Convex Optimization With Sparse Regularizers. - Ryo Hayakawa; Kazunori Hayashi (IEEE Access, 2018)

Discreteness-Aware Decoding for Overloaded Non-Orthogonal STBCs via Convex Optimization. - Ryo Hayakawa; Kazunori Hayashi (IEEE Commun. Lett., 2018)

Discreteness-Aware Approximate Message Passing for Discrete-Valued Vector Reconstruction. - Ryo Hayakawa; Kazunori Hayashi (IEEE Trans. Signal Process., 2018)

An Overloaded SC-CP IoT Signal Detection Method via Sparse Complex Discrete-Valued Vector Reconstruction. - Kazunori Hayashi; Ayano Nakai-Kasai; Ryo Hayakawa (APSIPA, 2019)

Discrete-Valued Vector Reconstruction by Optimization with Sum of Sparse Regularizers. - Ryo Hayakawa; Kazunori Hayashi (EUSIPCO, 2019)

Performance Analysis of Discrete-valued Vector Reconstruction Based on Box-constrained Sum of L1 Regularizers. - Ryo Hayakawa; Kazunori Hayashi (ICASSP, 2019)

Trainable Projected Gradient Detector for Massive Overloaded MIMO Channels: Data-Driven Tuning Approach. - Satoshi Takabe; Masayuki Imanishi; Tadashi Wadayama; Ryo Hayakawa; Kazunori Hayashi (IEEE Access, 2019)

An Overloaded IoT Signal Detection Method using Non-convex Sparse Regularizers. - Kazunori Hayashi; Ayano Nakai-Kasai; Atsuya Hirayama; Hiroki Honda; Tetsuya Sasaki; Hideki Yasukawa; Ryo Hayakawa (APSIPA, 2020)

Asymptotic Analysis of ADMM for Compressed Sensing. - Ryo Hayakawa (CoRR, 2020)

Noise Variance Estimation Using Asymptotic Residual in Compressed Sensing. - Ryo Hayakawa (CoRR, 2020)

Asymptotic Performance of Discrete-Valued Vector Reconstruction via Box-Constrained Optimization With Sum of $ ell _{1}$ Regularizers. - Ryo Hayakawa; Kazunori Hayashi (IEEE Trans. Signal Process., 2020)

Error Analysis of Douglas-Rachford Algorithm for Linear Inverse Problems: Asymptotics of Proximity Operator for Squared Loss. - Ryo Hayakawa (CoRR, 2021)

Asymptotic Performance Prediction for ADMM-Based Compressed Sensing. - Ryo Hayakawa (IEEE Trans. Signal Process., 2022)

Numerical Performance Evaluation of ℓ1 - ℓ2 Sparse Reconstruction Using Optical Analog Circuit. - Soma Furusawa; Kazunori Hayashi; Kaito Kameda; Ryo Hayakawa (APSIPA ASC, 2023)

Deep Unfolding-Aided Parameter Tuning for Plug-and-Play-Based Video Snapshot Compressive Imaging. - Takashi Matsuda; Ryo Hayakawa; Youji Iiguni (IEEE Access, 2025)

Depth-Aided Color Image Inpainting in Quaternion Domain. - Shunki Tatsumi; Ryo Hayakawa; Youji Iiguni (IEEE Signal Process. Lett., 2025)