Masayuki Nakada

Learn More
— In this paper, we propose a direct/cooperative amplify-and-forward relay (D/AR) switching using a spectrum division/adaptive subcarrier allocation (SDASA) for increasing the uplink capacity of single carrier-frequency division multiple access (SC-FDMA). In the D/AR switching, switching between direct communication and cooperative AF relay is done so that(More)
— In this paper, we propose a joint transmit/receive frequency domain equalization (FDE) based on minimum mean square error (MMSE) criterion for multi-input multi-output (MIMO) analog network coding (ANC) in single-carrier (SC) bi-directional relay communications. In the proposed scheme, the relay station (RS) equipped with multiple antennas carries out(More)
In this paper, we propose a spectrum division & adaptive subcarrier allocation for cooperative amplify-and-forward (AF) relay using single carrier-frequency division multiple access (SC-FDMA). To obtain increased frequency diversity gain, the transmit SC signal spectrum is divided into sub-blocks, to each of which a different set of subcarriers(More)
— A throughput performance significantly degrades near the cell edge due to the path loss, shadowing loss, and multipath-fading. A cooperative relay is a well-known technique to increase the cell-edge throughput. In the cooperative relay, it is expected that assigning different levels of data modulation for mobile terminal (MT) and relay station (RS) may(More)
— In this paper, we propose a power allocation method for the direct/cooperative amplify-and-forward (AF) relay switched SC-FDMA using spectrum division/adaptive subcarrier allocation (SDASA). The cooperative relaying is used only when it can achieve higher channel capacity than the direct communication. In the proposed power allocation method, transmit(More)
OBJECTIVES To examine the association between cardiopulmonary bypass-related systemic inflammation and resting energy expenditure in pediatric subjects following cardiac surgery. DESIGN Single-center, prospective cohort study. SETTING Pediatric cardiac critical care unit in Toronto, Canada. PATIENTS Children with congenital heart disease undergoing(More)
Relay using analog network coding (ANC) can achieve the same maximum throughput as the direct transmission while reducing the required transmit power. In this paper, we propose an adaptive power allocation scheme for bidirectional single-carrier (SC) ANC. The proposed scheme adaptively allocates the transmit power so as to make the instantaneous(More)