Heterogeneous constellation based QOSTBC for improving property of QRD-MLD. - Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ICCE, 2012)

Frequency symbol spreading based adaptive subcarrier block selection for OFDMA system. - Chang-Jun Ahn; Dongsoo Har; Tatsuya Omori; Ken-ya Hashimoto (Digit. Signal Process., 2012)

Heterogeneous Constellation Based QOSTBC for Improving Detection Property of QRD-MLD. - Chang-Jun Ahn; Ken-ya Hashimoto (IEICE Trans. Commun., 2012)

Throughput performance enhancement applying adaptive modulation for single symbol decodable QO-STBC with full diversity. - Masayuki Kitakatay; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (APCC, 2013)

Enhancement of cell-edge throughput performance with CoMP transmission using QO-STBC scheme. - Kei Okubo; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (GCCE, 2013)

Power priority selection and adaptive clipping with peak reduction signal for MUDiv/OFDMA. - Akihiro Kuroha; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (RIVF, 2013)

Interference compensation scheme using time domain replica signals for SP-MIMO/OFDM under large delay spread channel greater than GI. - Taichi Sakaue; Tomoki Yoshimura; Yuta Ida; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (RIVF, 2013)

A low phase noise FBAR based multiband VCO design. - Guoqiang Zhang 005; Abhay Kochhar; Keiji Yoshida; Shuji Tanaka; Ken-ya Hashimoto; Masayoshi Esashi; Haruichi Kanaya; Ramesh K. Pokharel (IEICE Electron. Express, 2013)

The methods of maintaining Low frequency stability in FBAR based cross-coupled VCO design. - Guoqiang Zhang 005; Abhay Kochhar; Keiji Yoshida; Shuji Tanaka; Ken-ya Hashimoto; Masayoshi Esashi; Ramesh K. Pokharel (IEICE Electron. Express, 2013)

IQ imbalance and carrier frequency offset compensation schemes for TFI-OFDM. - Hikaru Oka; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2014)

Single Symbol Decodable QO-STBC with Full Diversity. - Naotoshi Yoda; Chang-Jun Ahn; Ken-ya Hashimoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Maritime VHF communications with polarization diversity over a Rician channel. - Chang-Jun Ahn; Incheol Jeong; Izumi Endo; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Commun. Syst., 2014)

Multiuser Diversity OFDMA using Power Priority Selection and Adaptive Clipping. - Akihiro Kuroha; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Distributed Syst. Technol., 2014)

Time Domain Replica Signal Based Interference Compensation for SP-MIMO/OFDM with Large Delay Spread Channel. - Taichi Sakaue; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Distributed Syst. Technol., 2014)

Spatial performance of color clustered VLC-MIMO due to incompleteness of color filters. - Kotaro Abe; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

An application of OFDM-IDMA to uplink multiuser visible light communication system. - Asato Kuriharat; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

Channel compensation based on VPS and time-frequency interferometry for massive MIMO-OFDM. - Masaya Okamura; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

The accuracy improvement using WLAN for indoor positioning system. - Ye Tian; Wenjian Wang; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

IQ imbalance estimation and compensation schemes based on time-frequency interferometry for OFDM. - Hikaru Oka; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Trans. Emerg. Telecommun. Technol., 2015)

Performance enhancement with applying FSS and ASB method for MU-MIMO. - Fumiaki Ukaji; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ICIT, 2016)

A 1.9GHz Low-Phase-Noise Complementary Cross-Coupled FBAR-VCO without Additional Voltage Headroom in 0.18µm CMOS Technology. - Guoqiang Zhang 005; Awinash Anand; Kousuke Hikichi; Shuji Tanaka; Masayoshi Esashi; Ken-ya Hashimoto; Shinji Taniguchi; Ramesh K. Pokharel (IEICE Trans. Electron., 2017)

Monolithic Fabrication of Film Bulk Acoustic Resonators above Integrated Circuit by Adhesive- Bonding-Based Film Transfer. - Abhay Kochhar; Takeshi Matsumura; Guoqiang Zhang 005; Ramesh K. Pokharel; Ken-ya Hashimoto; Masayoshi Esashi; Shuji Tanaka (IEEE DataPort, 2022)