Tsuyoshi Kashima

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—This paper proposes two new types of maximum a posteriori probability (MAP) receivers for multiple-input–mul-tiple-output and orthogonal frequency-division multiplexing mobile communications with a channel coding such as the low-density parity-check code. One proposed receiver employs the expectation-maximization algorithm so as to improve performance of(More)
We focus the security and privacy threats in radio interface between evolved Node B (eNB, " base station ") and User Equipment (UE). We identify new threats including several user tracking attacks by various information in MAC and RRC signalling messages, and an active attack with false buffer status reports. Finally, we propose a solution including(More)
SUMMARY This paper proposes an iterative maximum a posteriori probability (MAP) receiver for multiple-input-multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) mobile communications. For exploiting the space, time, and frequency diversity, the low-density parity-check code (LDPC) is used as a channel coding with a built-in(More)
— This paper proposes novel channel estimation methods for an iterative maximum a posteriori (MAP) receiver. The targeted systems are low-density parity-check (LDPC)-coded multiple-input-multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) mobile communications. By reconsidering the joint processing of the iterative MAP receiver from(More)