43 citations · 92 across the 6 of their papers we have counts for
6 papers
Performance Improvement of Iterative Multiuser Detection for Large Sparsely-Spread CDMA Systems by Spatial Coupling
Keigo Takeuchi, Toshiyuki Tanaka, Tsutomu Kawabata
Kudekar et al. proved that the belief-propagation (BP) performance for low-density parity check (LDPC) codes can be boosted up to the maximum-a-posteriori (MAP) performance by spat…
Large-System Analysis of Joint User Selection and Vector Precoding with Zero-Forcing Transmit Beamforming for MIMO Broadcast Channels
Keigo Takeuchi, Ralf R. Mueller, Tsutomu Kawabata
Multiple-input multiple-output (MIMO) broadcast channels (BCs) (MIMO-BCs) with perfect channel state information (CSI) at the transmitter are considered. As joint user selection (U…
Large-System Analysis of Joint User Selection and Vector Precoding for Multiuser MIMO Downlink
Keigo Takeuchi, Ralf R. Mueller, Tsutomu Kawabata
Joint user selection (US) and vector precoding (US-VP) is proposed for multiuser multiple-input multiple-output (MU-MIMO) downlink. The main difference between joint US-VP and conv…
A Greedy Algorithm of Data-Dependent User Selection for Fast Fading Gaussian Vector Broadcast Channels
Keigo Takeuchi, Tsutomu Kawabata
User selection (US) with Zero-forcing beamforming is considered in fast fading Gaussian vector broadcast channels with perfect channel state information (CSI) at the transmitter. A…
Improvement of BP-Based CDMA Multiuser Detection by Spatial Coupling
Keigo Takeuchi, Toshiyuki Tanaka, Tsutomu Kawabata
Kudekar et al. proved that the belief-propagation (BP) threshold for low-density parity-check codes can be boosted up to the maximum-a-posteriori (MAP) threshold by spatial couplin…
A Phenomenological Study on Threshold Improvement via Spatial Coupling
Keigo Takeuchi, Toshiyuki Tanaka, Tsutomu Kawabata
Kudekar et al. proved an interesting result in low-density parity-check (LDPC) convolutional codes: The belief-propagation (BP) threshold is boosted to the maximum-a-posteriori (MA…