Kenichi Higuchi
YOU?
Author Swipe
View article: Adaptive Interference Restriction Among Spatial Streams Based on Difference in Singular Values for PAPR Reduction in Uplink Eigenmode Massive MIMO Transmission
Adaptive Interference Restriction Among Spatial Streams Based on Difference in Singular Values for PAPR Reduction in Uplink Eigenmode Massive MIMO Transmission Open
In this paper, we propose two peak-to-average power ratio (PAPR) reduction methods that apply adaptive in-band interference restriction based on singular value differences between spatial channels in uplink eigenmode massive multiple-input…
View article: Pharmaceutical company payments to Japanese breast cancer practice guideline authors
Pharmaceutical company payments to Japanese breast cancer practice guideline authors Open
Background The creation of breast cancer practice guidelines requires proper management of financial relationships with drug companies, as they can introduce conflicts of interest (COIs) among guideline authors. However, little is known ab…
View article: Throughput Maximization-Based AP Clustering Methods in Downlink Cell-Free MIMO Under Partial CSI Condition
Throughput Maximization-Based AP Clustering Methods in Downlink Cell-Free MIMO Under Partial CSI Condition Open
In this paper, we investigate a method for clustering user equipment (UE)-specific transmission access points (APs) in downlink cell-free multiple-input multiple-output (MIMO) assuming that the APs distributed over the system coverage know…
View article: Peak Cancellation Signal Generation Considering Variance in Signal Power among Transmitter Antennas in PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals
Peak Cancellation Signal Generation Considering Variance in Signal Power among Transmitter Antennas in PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals Open
We propose a novel peak-to-average power ratio (PAPR) reduction method based on a peak cancellation (PC) signal vector that considers the variance in the average signal power among transmitter antennas for massive multiple-input multiple-o…
View article: Financial Relationships Between Pharmaceutical Companies and Internal Medicine Societies
Financial Relationships Between Pharmaceutical Companies and Internal Medicine Societies Open
This cross-sectional study uses payment data publicly disclosed by pharmaceutical companies affiliated with the Japan Pharmaceutical Manufacturers Association to describe their financial relationships with the subspecialty societies of the…
View article: Financial conflicts of interest in Japanese obstetrics and gynaecology clinical practice guidelines
Financial conflicts of interest in Japanese obstetrics and gynaecology clinical practice guidelines Open
This commentary analysis evaluated the size and prevalence of financial conflicts of interest among authors of Japanese obstetrics and gynaecology clinical practice guidelines. Our analysis found that 66% of all authors received personal p…
View article: Financial relationships between board‐certified neurologists and the pharmaceutical industry in Japan
Financial relationships between board‐certified neurologists and the pharmaceutical industry in Japan Open
This study evaluated the size and fraction of non-research compensation to Japanese board-certified neurologists from the pharmaceutical industry between 2016 and 2020. We found that more than US$45 million were made to 59.2% of all neurol…
View article: Pharmaceutical company payments to Japanese breast cancer practice guideline authors
Pharmaceutical company payments to Japanese breast cancer practice guideline authors Open
Background: The creation of breast cancer practice guidelines requires careful management of conflicts of interest (COIs). However, limited evidence is available regarding the specific landscape and fraction of financial relationships betw…
View article: Conflicts of Interest Among Cardiology Clinical Practice Guideline Authors in Japan
Conflicts of Interest Among Cardiology Clinical Practice Guideline Authors in Japan Open
Background: Clinical practice guidelines (CPGs) offer disease management recommendations based on scientific evidence. However, financial conflicts of interest (FCOIs) between CPG developers and the pharmaceutical industry could bias these…
View article: Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying
Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying Open
This paper proposes a peak-to-average power ratio (PAPR) reduction method that utilizes the null space in a multiple-input multiple-output (MIMO) channel for downlink MIMO-orthogonal frequency division multiplexing (OFDM) signals with mult…
View article: Efficient Parallel PAPR Reduction Method Using Null-Constrained Peak Cancellation Signal for Massive MIMO-OFDM Systems
Efficient Parallel PAPR Reduction Method Using Null-Constrained Peak Cancellation Signal for Massive MIMO-OFDM Systems Open
In this paper, we propose new methods for reducing the peak-to-average power ratio (PAPR) for downlink massive multiple-input multiple-output (MIMO) along with orthogonal frequency division multiplexing. We develop the PAPR reduction metho…
View article: Pharmaceutical company payments to Japanese breast cancer practice guideline
Pharmaceutical company payments to Japanese breast cancer practice guideline Open
Background: The creation of breast cancer practice guidelines requires careful management of conflicts of interest (COIs). However, limited evidence is available regarding the specific landscape and fraction of financial relationships betw…
View article: NOMA-Based Highly-Efficient Low-Latency HARQ with Inter-Base Station Cooperation for URLLC
NOMA-Based Highly-Efficient Low-Latency HARQ with Inter-Base Station Cooperation for URLLC Open
This paper extends our previously reported non-orthogonal multiple access (NOMA)-based highly-efficient and low-latency hybrid automatic repeat request (HARQ) method for ultra-reliable low latency communications (URLLC) to the case with in…
View article: Highly-Efficient Low-Latency HARQ Built on NOMA for URLLC: Radio Resource Allocation and Transmission Rate Control Aspects
Highly-Efficient Low-Latency HARQ Built on NOMA for URLLC: Radio Resource Allocation and Transmission Rate Control Aspects Open
Hybrid automatic repeat request (HARQ) is an essential technology that efficiently reduces the transmission error rate. However, for ultra-reliable low latency communications (URLLC) in the 5th generation mobile communication systems and b…
View article: Trend in Industry Payments to Rheumatologists in the United States During the COVID-19 Pandemic Between 2013 and 2021
Trend in Industry Payments to Rheumatologists in the United States During the COVID-19 Pandemic Between 2013 and 2021 Open
The Open Payments Database (OPD), the legally binding database of payments made by pharmaceutical companies and device manufacturers to all physicians,1 was launched in 2013 in the United States, in order to improve transparency in the fin…
View article: Online Probabilistic Activation Control of Base Stations Utilizing Temporal System Throughput and Activation States of Neighbor Cells for Heterogeneous Networks
Online Probabilistic Activation Control of Base Stations Utilizing Temporal System Throughput and Activation States of Neighbor Cells for Heterogeneous Networks Open
In this paper, we propose an online probabilistic activation/deactivation control method for base stations (BSs) in heterogeneous networks based on the temporal system throughput and activation states of neighbor BSs (cells). The conventio…
View article: Parallel Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Transmission
Parallel Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Transmission Open
This paper proposes a parallel peak cancellation (PC) process for the computational complexity-efficient algorithm called PC with a channel-null constraint (PCCNC) in the adaptive peak-to-average power ratio (PAPR) reduction method using t…
View article: NOMA-Based Optimal Multiplexing for Multiple Downlink Service Channels to Maximize Integrated System Throughput
NOMA-Based Optimal Multiplexing for Multiple Downlink Service Channels to Maximize Integrated System Throughput Open
We propose a novel non-orthogonal multiple access (NOMA)-based optimal multiplexing method for multiple downlink service channels to maximize the integrated system throughput. In the fifth generation (5G) mobile communication system, the s…
View article: Decentralized Probabilistic Frequency-Block Activation Control Method of Base Stations for Inter-cell Interference Coordination and Traffic Load Balancing
Decentralized Probabilistic Frequency-Block Activation Control Method of Base Stations for Inter-cell Interference Coordination and Traffic Load Balancing Open
In this paper, we propose a decentralized probabilistic frequency-block activation control method for the cellular downlink. The aim of the proposed method is to increase the downlink system throughput within the system coverage by adaptiv…
View article: Complexity-Reduced Adaptive PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals
Complexity-Reduced Adaptive PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals Open
This paper proposes a computational complexity-reduced algorithm for an adaptive peak-to-average power ratio (PAPR) reduction method previously developed by members of our research group that uses the null space in a multiple-input multipl…
View article: Radio Access Technologies for Broadband Mobile Communications
Radio Access Technologies for Broadband Mobile Communications Open
This paper describes the broadband radio access techniques for Universal Mobile Terrestrial Systems (UMTS)/Wideband Code Division Multiple Access (W-CDMA), High-Speed Downlink Packet Access (HSDPA)/High-Speed Uplink Packet Access (HSUPA), …
View article: Performance Evaluation of Joint Power and Frequency-Domain Intercell Interference Coordination in Heterogeneous Networks
Performance Evaluation of Joint Power and Frequency-Domain Intercell Interference Coordination in Heterogeneous Networks Open
We evaluate our previously reported joint power and frequency-domain inter-cell interference coordination (ICIC) method for heterogeneous networks where low transmission-power pico base stations (BSs) overlay onto a high transmission-power…
View article: Investigation on Power Control Algorithm in Joint Control Method of Autonomous Cell Association and Power Control for Heterogeneous Networks
Investigation on Power Control Algorithm in Joint Control Method of Autonomous Cell Association and Power Control for Heterogeneous Networks Open
This paper proposes a power control algorithm for our previously reported joint control method for autonomous cell association and transmission power control of pico-base stations (BSs) in heterogeneous networks with intercell interference…
View article: Cross-connect System with Packet Transport Technology
Cross-connect System with Packet Transport Technology Open
The public switched telephone network (PSTN) and existing dedicated line services have been carried over transmission lines using older data link systems based on time-division multiplexing technology.However, as Internet protocol traffic …
View article: Non-orthogonal Multiple Access (NOMA) with Successive Interference Cancellation for Future Radio Access
Non-orthogonal Multiple Access (NOMA) with Successive Interference Cancellation for Future Radio Access Open
This paper presents our investigation of non-orthogonal multiple access (NOMA) as a novel and promising power-domain user multiplexing scheme for future radio access. Based on information theory, we can expect that NOMA with a successive i…