Naoto Ohkubo

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This paper investigates the optimum minimum coding rate of a very-low-rate Turbo coding and spreading factor value that achieves one-cell frequency reuse in Variable Spreading Factor (VSF)-Spread Orthogonal Frequency Division Multiplexing (OFDM) radio access in the downlink. Simulation results show that the optimum minimum coding rate is approximately R =(More)
The model-based approaches for tracking of human bodies in image sequences can be categorized into two types; tting model to body frame by frame, and accumulating estimated pose displacements in successive frames after model tting at the initial frame. The latter has an inherent drawback as accumulation of tracking errors while the one has a great advantage(More)
Various channel estimation methods for multiple-input multiple-output (MIMO) systems have been proposed. In this paper, to prevent performance degradation for the space-time trellis coded OFDM (STTC-OFDM) system in fast fading channels, we propose a system that applies the added pilot semi-blind (APSB) channel estimation to all the OFDM data symbols except(More)
In the LTE-Advanced downlink, carrier aggregation (CA) employing multiple component carriers (CCs) is an essential technique to achieve a target peak data rate of 1 Gbps. 3GPP RAN WG1 meeting decided to adopt one transport block (TB) per CC, where the TB is the unit of channel coding and hybrid automatic repeat request (HARQ). When CA is applied to an(More)
This paper proposes synchronous transmission with delay diversity and soft-combining reception in the same node B for the paging channel (PCH) and paging indicator (PI) information in the OFDM based evolved UTRA downlink. In the proposed transmission scheme, the PCH and PI information are received through soft-combining from two contiguous sectors within(More)
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