Hierarchical Decoupling Principle of a MIMO-CDMA Channel in Asymptotic Limits. - Keigo Takeuchi; Toshiyuki Tanaka (ISIT, 2007)

Asymptotic analysis of iterative channel estimation and multiuser detection with soft feedback in multipath channels. - Mikko Vehkaperä; Keigo Takeuchi; Ralf R. Müller; Toshiyuki Tanaka (EUSIPCO, 2008)

Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. - Keigo Takeuchi; Mikko Vehkaperä; Toshiyuki Tanaka; Ralf R. Müller (ISIT, 2008)

Asymptotic Analysis of General Multiuser Detectors in MIMO DS-CDMA Channels. - Keigo Takeuchi; Toshiyuki Tanaka; Toru Yano (IEEE J. Sel. Areas Commun., 2008)

How Much Training Is Needed for Iterative Multiuser Detection and Decoding? - Mikko Vehkaperä; Keigo Takeuchi; Ralf R. Müller; Toshiyuki Tanaka (GLOBECOM, 2009)

Practical signaling with vanishing pilot-energy for large noncoherent block-fading MIMO channels. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä; Toshiyuki Tanaka (ISIT, 2009)

Iterative channel and data estimation: Framework and analysis via replica method. - Mikko Vehkaperä; Keigo Takeuchi; Ralf R. Müller; Toshiyuki Tanaka (ISIT, 2009)

A new signaling scheme for large DS-CDMA channels without CSI. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä; Toshiyuki Tanaka (WiOpt, 2009)

On asymptotic performance of iterative channel and data estimation in large DS-CDMA systems. - Mikko Vehkaperä; Keigo Takeuchi; Ralf R. Müller; Toshiyuki Tanaka (WiOpt, 2009)

Analysis of large MIMO DS-CDMA systems with imperfect CSI and spatial correlation. - Mikko Vehkaperä; Keigo Takeuchi; Ralf R. Müller; Toshiyuki Tanaka (ISIT, 2010)

An achievable rate of large block-fading MIMO systems with no CSI via successive decoding. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä; Toshiyuki Tanaka (ISITA, 2010)

Performance analysis of optimal channel estimation and multiuser detection in a randomly-spread CDMA channel. - Keigo Takeuchi; Mikko Vehkaperä; Toshiyuki Tanaka; Ralf R. Müller (J. Syst. Sci. Complex., 2010)

A Construction of Turbo-Like Codes for Iterative Channel Estimation Based on Probabilistic Bias. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä (GLOBECOM, 2011)

Improvement of BP-based CDMA multiuser detection by spatial coupling. - Keigo Takeuchi; Toshiyuki Tanaka; Tsutomu Kawabata (ISIT, 2011)

Bias-Based Training for Iterative Channel Estimation and Data Decoding in Fast Fading Channels. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä (IEICE Trans. Commun., 2011)

Large-system analysis of joint user selection and vector precoding with zero-forcing transmit beamforming for MIMO broadcast channels. - Keigo Takeuchi; Ralf R. Müller; Tsutomu Kawabata (ISITA, 2012)

A Greedy Algorithm of Data-Dependent User Selection for Fast Fading Gaussian Vector Broadcast Channels - Keigo Takeuchi; Tsutomu Kawabata (CoRR, 2012)

Large-System Analysis of Joint User Selection and Vector Precoding for Multiuser MIMO Downlink - Keigo Takeuchi; Ralf R. Müller; Tsutomu Kawabata (CoRR, 2012)

A Phenomenological Study on Threshold Improvement via Spatial Coupling. - Keigo Takeuchi; Toshiyuki Tanaka; Tsutomu Kawabata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Large-System Analysis of Joint Channel and Data Estimation for MIMO DS-CDMA Systems. - Keigo Takeuchi; Mikko Vehkaperä; Toshiyuki Tanaka; Ralf R. Müller (IEEE Trans. Inf. Theory, 2012)

Multi-dimensional spatially-coupled codes. - Ryunosuke Ohashi; Kenta Kasai; Keigo Takeuchi (ISIT, 2013)

A Potential Theory of General Spatially-Coupled Systems via a Continuum Approximation - Keigo Takeuchi; Toshiyuki Tanaka; Kenta Kasai (CoRR, 2013)

Accelerating Iterative Detection for Spatially Coupled Systems by Collaborative Training. - Keigo Takeuchi (IEEE Commun. Lett., 2013)

Iterative LMMSE Channel Estimation and Decoding Based on Probabilistic Bias. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä (IEEE Trans. Commun., 2013)

On an Achievable Rate of Large Rayleigh Block-Fading MIMO Channels With No CSI. - Keigo Takeuchi; Ralf R. Müller; Mikko Vehkaperä; Toshiyuki Tanaka (IEEE Trans. Inf. Theory, 2013)

Iterative Multiuser Detection and Decoding with Spatially Coupled Interleaving. - Keigo Takeuchi; Shuhei Horio (IEEE Wirel. Commun. Lett., 2013)

A generalization of threshold saturation: application to spatially coupled BICM-ID. - Keigo Takeuchi (ISIT, 2014)

Iterative LMMSE Channel Estimation, Multiuser Detection, and Decoding via Spatial Coupling. - Keigo Takeuchi (CoRR, 2014)

Spatial Modulation Achieves Information-Theoretically Optimal Energy Efficiency. - Keigo Takeuchi (IEEE Commun. Lett., 2015)

Iterative Channel Estimation and Decoding via Spatial Coupling. - Shuhei Horio; Keigo Takeuchi; Tsutomu Kawabata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Performance Improvement of Iterative Multiuser Detection for Large Sparsely Spread CDMA Systems by Spatial Coupling. - Keigo Takeuchi; Toshiyuki Tanaka; Tsutomu Kawabata (IEEE Trans. Inf. Theory, 2015)

Second-Order Optimality of Generalized Spatial Modulation for MIMO Channels With No CSI. - Keigo Takeuchi (IEEE Wirel. Commun. Lett., 2015)

Asymptotic Optimality of Massive MIMO Systems Using Densely Spaced Transmit Antennas. - Keigo Takeuchi (CoRR, 2016)

Asymptotic Optimality of QPSK Faster-than-Nyquist Signaling in Massive MIMO Systems. - Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Rigorous dynamics of expectation-propagation signal detection via the conjugate gradient method. - Keigo Takeuchi; Chao-Kai Wen (SPAWC, 2017)

Orthogonal approximate message passing for GFDM detection. - Suchun Zhang; Chao-Kai Wen; Keigo Takeuchi; Shi Jin 002 (SPAWC, 2017)

A Unified Framework of State Evolution for Message-Passing Algorithms. - Keigo Takeuchi (ISIT, 2019)

A Family of Counterexamples to the Central Limit Theorem Based on Binary Linear Codes. - Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Hardware-Aware Sum-Product Decoding in the Decision Domain. - Mizuki Yamada; Keigo Takeuchi; Kiyoyuki Koike (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Pilot Decontamination in Massive MIMO Uplink via Approximate Message-Passing. - Takumi Fujitsuka; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Expectation Propagation Decoding for Sparse Superposition Codes. - Hiroki Mayumi; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Convolutional Approximate Message-Passing. - Keigo Takeuchi (IEEE Signal Process. Lett., 2020)

Rigorous Dynamics of Expectation-Propagation-Based Signal Recovery from Unitarily Invariant Measurements. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2020)

Expectation-Propagation Detection for Generalized Spatial Modulation with Sparse Orthogonal Precoding. - Tatsuya Sugiyama; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Pilot Decontamination in Spatially Correlated Massive MIMO Uplink via Expectation Propagation. - Wataru Tatsuno; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Bayes-Optimal Convolutional AMP. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2021)

Orthogonal Approximate Message-Passing for Spatially Coupled Systems. - Keigo Takeuchi (CoRR, 2022)

Finite-Size Correction of Expectation-Propagation Detection. - Yuki Oba; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

On the Convergence of Convolutional Approximate Message-Passing for Gaussian Signaling. - Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

On the Convergence of Orthogonal/Vector AMP: Long-Memory Message-Passing Strategy. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2022)

Long-Memory Message-Passing for Spatially Coupled Systems. - Keigo Takeuchi (ICASSP, 2023)

Deep Learning of Damped AMP Decoding Networks for Sparse Superposition Codes via Annealing. - Toshihiro Yoshida; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Simplification and Accurate Implementation of State Evolution Recursion for Conjugate Gradient. - Sakyo Hashimoto; Keigo Takeuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Orthogonal Approximate Message-Passing for Spatially Coupled Linear Models. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2024)

Decentralized Generalized Approximate Message-Passing for Tree-Structured Networks. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2024)

Generalized Approximate Message-Passing for Compressed Sensing With Sublinear Sparsity. - Keigo Takeuchi (IEEE Trans. Inf. Theory, 2025)