Hiroki SHOKI

Multiband Automatic Tunable Antenna System Based on the Received Power of a Probe
Makoto HIGAKI Shuichi OBAYASHI Hiroki SHOKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/11/01
Vol. E99-B  No. 11  pp. 2390-2398
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
automatic tuning, multiband antenna, small antenna, 
 Summary | Full Text:PDF(4.3MB)
Reduced Complexity Max-Log-MAP Sphere Decoder Using Group Detection in MIMO-OFDM Systems
Tsuguhide AOKI Yasuhiko TANABE Hidehiro MATSUOKA Hiroki SHOKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/11/01
Vol. E88-B  No. 11  pp. 4220-4228
Type of Manuscript:  Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
MIMO, OFDM, ML, MMSE, sphere decoder, IEEE802.11a, IEEE802.11n, 
 Summary | Full Text:PDF(1.2MB)
Antennas for Wireless Terminals
Syu-ichi SEKINE Hiroki SHOKI Hisashi MORISHITA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/03/01
Vol. E86-B  No. 3  pp. 1005-1015
Type of Manuscript:  INVITED PAPER (Special Issue on Historical Review of Antenna Systems in Japan)
Category: 
Keyword: 
antenna, wireless terminal, built-in, diversity, 
 Summary | Full Text:PDF(1.2MB)
Novel Design Method for Antennas for Selection Diversity on Wireless Terminals
Syuichi SEKINE Noriaki ODACHI Osamu SHIBATA Hiroki SHOKI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2451-2459
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Mobile Antennas
Keyword: 
antenna selection diversity, hand-held phone, inverted-F antenna, monopole antenna, FDTD method, 
 Summary | Full Text:PDF(2MB)
An Adaptive Array Antenna Steered by IF Local Signal Phase Shifters for K-Band Broadband Fixed Wireless Access Base Station
Shuichi OBAYASHI Osamu SHIBATA Hideo KASAMI Hiroki SHOKI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2523-2529
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Adaptive Antennas
Keyword: 
adaptive array antenna, fixed wireless access, base station, local signal phase shifter, K-band, 
 Summary | Full Text:PDF(794.7KB)
A Modified DCMP Algorithm for SDMA Receiver in Base Station of Broadband Fixed Wireless Access Systems
Hideo KASAMI Shuichi OBAYASHI Hiroki SHOKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1774-1780
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Adaptive Algorithms and Experiments
Keyword: 
SDMA, broadband FWA, DOA estimation, modified DCMP, 
 Summary | Full Text:PDF(2.5MB)
A Novel Analytical Method for Optimizing the Terminating Impedance of an Inverted-F Antenna for Antenna Selection Diversity on a Hand-Held Phone
Noriaki ODACHI Syuichi SEKINE Hiroki SHOKI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/01/01
Vol. E84-B  No. 1  pp. 89-94
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
antenna selection diversity, hand-held phone, terminating impedance, inverted-F antenna, Z-matrix, 
 Summary | Full Text:PDF(301.7KB)
A Pattern Synthesis Method for Multibeam Reflector Antennas
Hiroki SHOKI Kazuaki KAWABATA Tasuku MOROOKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/01/25
Vol. E77-B  No. 1  pp. 64-72
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antenna, multibeam, reflector, pattern synthesis, cluster feed, 
 Summary | Full Text:PDF(742.5KB)
A Multiple Shaped Beam Antenna Using a Single Shaped Reflector
Hiroki SHOKI Kazuaki KAWABATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/12/25
Vol. E76-B  No. 12  pp. 1500-1507
Type of Manuscript:  Special Section PAPER (Special Issue on 1992 Internatioal Symposium on Antennas and Propagation)
Category: 
Keyword: 
antenna, multibeam, shaped beam, shaped reflector, 
 Summary | Full Text:PDF(583.5KB)
A Circularly Polarized Slot-Coupled Microstrip Antenna Using a Parasitically Excited Slot
Hiroki SHOKI Kazuaki KAWABATA Hisao IWASAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/10/25
Vol. E74-B  No. 10  pp. 3268-3273
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Communication Antennas)
Category: 
Keyword: 
 Summary | Full Text:PDF(542.1KB)