Toshiaki Koike Akino

Ph.D. in Informatics
JSPS Postdoctoral Fellow for Research Abroad

Harvard University
School of Engineering and Applied Sciences
Communications and Networking Laboratory
33 Oxford Street, MD-117, Cambridge, MA 02138, U.S.A.

E-mail: koike@seas.harvard.edu

Gender: Male
DOB: Apr. 18. 1979
Detail CV: [PDF download here]

Academic Record

• Feb. 2006-Feb. 2010, working as a postdoctral research scholar at School of Engineering and Applied Sciences, Harvard University.
• Sept. 2005, received Ph.D. degree of Informatics in Dept. of Communications and Computer Engineering, Graduate School of Informatics, Kyoto University
  [PDF download] Ph.D. Thesis: ``Space-time-frequency signal processing for spectrum-efficient multiple-antenna wireless transmission systems''
• Sept. 2003, received M.S. degree of Informatics in Dept. of Communications and Computer Engineering, Graduate School of Informatics, Kyoto University
• Mar. 2002, received B.S. degree of Engeneering from School of Electrical and Electronic Engineering, Faculty of Engineering, Kyoto University

Awards

• IEICE Communications Society Meritorious Award 2008
• IEICE Communications Society Meritorious Award 2006
• The 21st TELECOM System Technology Award for the following paper: ``Prototype implementation of real-time ML detectors for spatial multiplexing transmission''
• The 4th YRP Encouragement Award: ``MLSE adaptive equalizer with per-survivor QR decomposition in trellis-coded MIMO transmissions''
• IEEE VTS Japan Chapter presented VTC2005-Spring Student Paper Award: ``FPGA implementation of real-time 1Gbps 4x4 MIMO-MLD''
• IEICE 2003 Active Research Award in Radio Communication Systems

Scholarships & Financial Support

• JSPS Postdoctoral Fellow for Reserch Abroad: during Mar. 2008 - Feb. 2010.
• Telecommunications Advancement Foundation (TAF) Fellow for Research Abroad: during Apr. 2007 - Feb. 2008.
• JSPS Postdoctoral Research Fellow: during Oct. 2005 - Mar. 2007.
• Research Fellow of the Japan Society for the Promotion Science (JSPS): during Apr. 2004. - Sept. 2005.
• Research Assistant for the 21st Century Center of Excellence (COE) Program: during Oct. 2003 - Sept. 2005.

Academic Society

• Member of the IEEE: since June 2005.
• Reviewer of the IEICE Transactions on Communications: since Mar. 2004.
• Member of the Institute of Electronics, Information and Communication Engineers (IEICE): since May 2002.

Research Interest

• Distributed cooperative multiuser detection, diversity, multiplexing, and modulations
• Multi-point information theory and wireless network coding with cooperation and competition
• Body-area networks, and healthcare information technology
• Base-band signal processing relevant to detection schemes of co-channel signals (including space-time transmissions, multiple-input multiple-output, and spatial multiplexing)
• Hardware implementations and experiments relevant to space-time transmission systems
• Coded modulations, equalization, error control schemes and pre-coding

Presentation Lists

Journal Papers and Letters

• Toshiaki Koike-Akino, Petar Popovski, and Vahid Tarokh ``Optimized constellations for two-way wireless relaying with physical network coding,'' submitted to IEEE Journal on Selected Areas in Communications , Aut. 2008.
• Toshiaki Koike-Akino, Natasha Devroye, and Vahid Tarokh ``Frequency-domain bit-flipping equalizer for ultra-wideband MIMO channels,'' submitted to IEEE Transactions on Signal Processing , May 2008.
• Toshiaki Koike-Akino, ``Low-complexity MLD using norm-constraint approach for multiple-antenna systems,'' submitted to IEEE Transactions on Wireless Communications, Apr. 2008.
• Toshiaki Koike-Akino, ``Low-complexity systolic V-BLAST architecture,'' submitted to IEEE Transactions on Wireless Communications, Apr. 2008.
• Toshiaki Koike Akino, ``Optimum-weighted RLS channel estimation for rapid fading MIMO channels,'' to-be publised in IEEE Transactions on Wireless Communications, vol. , no. , pp. -, 2008.
• [PDF download] Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``Prototype implementation of real-time ML detectors for spatial multiplexing transmission,'' IEICE Transactions on Communications, vol. E89-B, no.3, pp. 845-852, March 2006.
• [PDF download] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Experimental evaluation of spatial interleaving in trellis-coded MIMO transmission,'' IEICE Transactions on Communications, vol. E89-B, no. 3, pp. 985-989, March 2006.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Adaptive MLSE equalizer with per-survivor QR decomposition for trellis-coded MIMO transmission,'' Kluwer Journals on Wireless Personal Communications, vol. 35, pp. 213--225, October 2005.
• [PDF download] Toshiaki Koike, Masakazu Tanaka, and Susumu Yoshida, ``Capacity improvement of multihop inter-vehicle communication networks by STBC cooperative relaying,'' IEICE Transactions on Communications, vol. E88-B, no. 9, pp. 3546-3553, September 2005.
• [PDF download] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Genetic design method for near-optimal training sequences in wideband multiple antenna systems,'' IEICE Transactions on Communications, vol. E88-B, no. 8, pp. 3488-3492, August 2005.
• Toshiaki Koike and Susumu Yoshida, ``Space-time trellis-coded ternary PSK for mobile communications,'' IEE Electronics Letters, vol. 40, no. 16, pp. 1011-1012, August 2004.
• [PDF download] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Evaluation of HARQ scheme with antenna permutation and TCM reassignment for space-time transmission in slow Nakagami-Rice fading MIMO channel,'' IEICE Transactions on Communications, vol. E87-B, no. 6, pp. 1487-1494, June 2004.

International Conference

• Toshiaki Koike-Akino, Petar Popovski, and Vahid Tarokh, ``Denoising function optimization for DNF-based multihop connections,'' submitted to The 2009 IEEE International Conference on Communications (ICC2009), Dresden, Germany, June 2009.
• Toshiaki Koike-Akino, Petar Popovski, and Vahid Tarokh, ``Signaling constellations for two-way relaying with network coding,'' submitted to The 2008 Asilomar Conference on Signal, Systems, and Computers, Pacific Grove, CA, Oct. 2008. (Invited Presentation)
• Toshiaki Koike-Akino, Petar Popovski, and Vahid Tarokh, ``Denoising maps and constellations for wireless network coding in two-way relaying systems,'' The 2008 IEEE Global Communicatitons Conference (GLOBECOM 2008), New Orleans, LA, Nov.-Dec. 2008.
• Toshiaki Koike-Akino, ``Bit-flipping equalizer and ML search-space analysis for ultra-wideband MIMO channels,'' The 2008 IEEE Global Communicatitons Conference (GLOBECOM 2008), New Orleans, LA, Nov.-Dec. 2008.
• Toshiaki Koike Akino, ``Optimum-weighted RLS channel estimation for time-varying fast fading MIMO channels,'' Proc. of The 2007 IEEE International Conference on Communications (ICC 2007), Glasgow, Scotland, June 2007.
• Toshiaki Koike, ``Low-complexity architecture of MMSE/V-BLAST with recurrence formula for systolic weights generation,'' Proc. of The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC 2006), San Diego, U.S.A., September 2006.
• Kohei Kiyoshima, Toshiaki Koike, and Susumu Yoshida, ``Algorithm-diversity of MIMO-MMSE with multiple channel estimation schemes for fast fading channels,'' Proc. of The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC 2006), San Diego, U.S.A., September 2006.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Iterative FDE for DD-based cooperative relaying with FD-STBC in quasi-synchronous networks,'' Proc. of The 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2006), Helsinki, Finland, September 2006.
• Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``FPGA prototyping of MIMO detector for over-1Gbps wireless transmissions,'' Proc. of The XXVIIIth URSI General Assembly (URSI-GA 2005), New Delhi, India, October 2005. (invited presentation)
• Toshiaki Koike and Susumu Yoshida, ``Approximated ML detector using Hopfield neural network in MIMO spatial multiplexing systems,'' Proc. of The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC 2005), pp. 858-862, Aalborg, Denmark, September 2005.
• Toshiaki Koike, Masakazu Tanaka, and Susumu Yoshida, ``System-level evaluation of STC cooperative relaying scheme in multihop IVC networks,'' Proc. of The 2nd Asia Pacific Wireless Communciations Sympojium (APWCS 2005), pp. 60-64, Sapporo, Japan, August 2005.
• Yasunori Nouda, Toshiaki Koike, and Susumu Yoshida, ``Iterative MLD equalizer preceded by MIMO-FDE for wideband spatial multiplexing systems,'' Proc. of The 61st IEEE Semianual Vehicular Technology Conference (VTC 2005-Spring), Stockholm, Sweden, May-June 2005.
• Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``FPGA implementation of 1Gbps real-time 4x4 MIMO-MLD,'' Proc. of The 61st IEEE Semianual Vehicular Technology Conference (VTC 2005-Spring), Stockholm, Sweden, May-June 2005.
• Toshiaki Koike, Daisuke Nishikawa, and Susumu Yoshida, ``Metric-segmented low-complexity ML detection for spectrum-efficient multiple-antenna systems,'' Proc. of The 61st IEEE Semianual Vehicular Technology Conference (VTC 2005-Spring), Stockholm, Sweden, May-June 2005.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``MLSE adaptive equalizer with per-survivor QR decomposition for trellis-coded MIMO transmissions,'' Proc. of The 7th International Symposium on Wireless Personal Multimedia Communications (WPMC 2004), Abano Terme, Italy, September 2004.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Frequency-domain SC/MMSE iterative equalizer with MF approximation in LDPC-coded MIMO transmissions,'' Proc. of The 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2004), Barcelona, Spain, September 2004.
• Toshiaki Koike and Susumu Yoshida, ``Genetic designing of near-optimal training sequences for spatial multiplexing transmissions,'' Proc. of The Joint Conference of 10th Asia-Pacific Conference on Communications and 5th International Symposium on Multi-Dimensional Mobile Communications (APCC/MDMC 2004), Beijing, China, vol. 1, pp. 474-478, August-September 2004.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Hybrid ARQ scheme suitable for coded MIMO transmission,'' Proc. of The IEEE International Conference on Communications (ICC 2004), Paris, France, June 2004.
• Toshiaki Koike and Susumu Yoshida, ``Space-time coded ternary phase shift keying,'' Proc. of The 4th International Conference on Information, Communications & Signal Processing 4th IEEE Pacific-Rim Conference On Multimedia (ICICS-PCM 2003), Singapore, December 2003.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Laboratory experiments of coded space-time transmission with spatial interleaving for wireless MIMO channels,'' Proc. of The 6th International Symposium on Wireless Personal Multimedia communications (WPMC 2003), Yokosuka, Japan, vol. 2, pp. 396-400, October 2003.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Spatial interleaving for vector Viterbi equalizer with super-trellis decoding in trellis-coded space-time transmission,'' Proc. of The 14th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2003), Beijing, China, vol. 2, pp. 1302-1306, September 2003.
• Toshiaki Koike, Koutarou Shiizaki, Hidekazu Murata, and Susumu Yoshida, ``Experimental study of multi-user detector with trellis-coding for microcellular radio,'' Proc. of The 5th International Symposium on Wireless Personal Multimedia communications (WPMC 2002), Honolulu, Hawaii, vol. 3, pp. 1252-1256, October 2002.

Technical Reports

• [Japanese PDF] Toshiaki Koike, Hajime Kanzaki, and Susumu Yoshida, ``Extension of optimum-weighted LS channel estimation to multi-antenna systems,'' IEICE Technical Report, RCS2006-134, pp. 7-12, October 2006. (in Japanese)
• Hidekazu Murata, Toshiaki Koike, Shingo Enoki, and Kiyomichi Araki, ``[Technology Exhibit] FPGA implementation of radio equipments for wireless multihop cooperative networks,'' IEICE Technical Report, SR2006-29, pp. 109-112, July 2005. (in Japanese)
• [Japanese PDF] Takashi Shimizu, Toshiaki Koike, and Susumu Yoshida, ``Adaptive iteration control using EXIT chart analysis for frequency-domain turbo equalizer in LDPC-coded MIMO transmission,'' IEICE Technical Report, RCS2006-67, pp. 49-54, July 2006. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Kohei Kiyoshima, and Susumu Yoshida, ``Low-complexity recursive algorithm for MIMO-BLAST receiver,'' IEICE Technical Report, RCS2006-59, pp. 1-6, July 2006. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hajime Kanzaki, and Susumu Yoshida, ``Theoretical study on least-squares channel estimation with optimum weighting for fast fading environments,'' IEICE Technical Report, RCS2006-59, pp. 1-6, July 2006. (in Japanese)
• Shingo Enoki, Toshiaki Koike, Hidekazu Murata, and Kiyomichi Araki, ``[Technology Exhibit] Field trial equipments for wireless multihop cooperative networks,'' IEICE Technical Report, SN2006-, pp. - , January 2006. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``[Technology Exhibit] Single-chip implementation sample of received signal generator and MLD for real time demonstration of MIMO signal processing technique,'' IEICE Technical Report, SR2005-29, pp. 59-65, July 2005. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Yasunori Nouda, and Susumu Yoshida, ``Quasi-ML iterative space-time equalizer assisted by frequency-domain MMSE equalization,'' IEICE Technical Report, RCS2004-293, pp. 19-24, January 2005. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Daisuke Nishikawa, and Susumu Yoshida, ``Simplified maximum-likelihood detection scheme employing metric segmentation and norm constraint,'' IEICE Technical Report, RCS2004-292, pp. 13-18, January 2005. (in Japanese)
• [Japanese PDF] Yukinaga Seki, Toshiaki Koike, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``FPGA implementation and performance evaluation of real-time MIMO-MLD using simplified metrics,'' IEICE Technical Report, RCS2004-291, pp. 7-12, January 2005. (in Japanese)
• [Japanese PDF] Masakazu Tanaka, Toshiaki Koike, and Susumu Yoshida, ``Capacity enhancement with space-time coded cooperative relaying in multihop inter-vehicle communications,'' IEICE Technical Report, RCS2004-240, pp. 24-30, January 2005. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Frequency-domain STBC and iterative equalization for cooperative multihop communications with delay diversity,'' IEICE Technical Report, RCS2004-225, pp. 13-18, November 2004. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Performance evaluation of space-time iterative equalization in LDPC-coded spatial multiplexing communications,'' IEICE Technical Report, RCS2003-333, pp. 1-5, March 2004. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Study on QR decomposition-based branch metric computation in trellis-coded spatial multiplexing transmission,'' IEICE Technical Report, RCS2003-149, pp. 59-64, October 2003. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Study on ARQ throughput performance of space-time transmission systems,'' IEICE Technical Report, RCS2002-228, pp. 125-130, January 2003. (in Japanese)
• [Japanese PDF] Koutarou Shiizaki, Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Experimental evaluation of spatial interleaving technique for trellis-coded space-time transmission systems,'' IEICE Technical Report, RCS2002-229, pp. 131-136, January 2003. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Performance improvement of trellis-coded space-time transmission system with spatial interleave in frequency flat fading environment,'' IEICE Technical Report, RCS2002-153, pp. 41-46, August 2002. (in Japanese)
• [Japanese PDF] Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Laboratory experiments of multi-user detector for space-time transmission,'' IEICE Technical Report, RCS2001-259, pp. 101-106, March 2002. (in Japanese)

Local Conference

• Kohei Kiyoshima, Toshiaki Koike, Kazuto Yano, Susumu Yoshida, ``Performance evaluation of RLS weights generation method using pseudo training signal for MIMO-MMSE,'' IEICE Society Conference, B-5-11, p. 411, September 2005. (in Japanese)
• Shingo Enoki, Toshiaki Koike, Hidekazu Murata, and Kiyomichi Araki, ``Field trial equipments for multihop radio networks using space-time coded cooperative relaying,'' IEICE Society Conference, B-5-141, p. 511, September 2005. (in Japanese)
• Yasunori Nouda, Toshiaki Koike and Susumu Yoshida, ``A study on quasi-ML iterative space-time equalizer for MIMO systems,'' IEICE General Conference, B-5-106, p. 555, March 2005. (in Japanese)
• Toshiaki Koike and Susumu Yoshida, ``On the relation between MLD solution and diversity in spatial multiplexing transmissions,'' IEICE General Conference, B-5-105, p. 554, March 2005. (in Japanese)
• Toshiaki Koike and Susumu Yoshida, ``Performance evaluation of iterative space-time equalizer with weighted bit-flipping decoding,'' IEICE Society Conference, B-5-22, p. 356, September 2004. (in Japanese)
• Yukinaga Seki, Toshiaki Koike, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``Real-time 850Mbps MIMO-MLD implemented in FPGA for MIMO spatial multiplexing systems,'' IEICE Society Conference, B-5-15, p. 349, September 2004. (in Japanese)
• Masakazu Tanaka, Toshiaki Koike and Susumu Yoshida, ``Connectivity in inter-vehicle multihop communications applying STBC cooperative relaying,'' IEICE Society Conference, A-17-8, p. 175, September 2004. (in Japanese)
• Toshiaki Koike and Susumu Yoshida, ``On computational complexity of metric-segmentized maximum likelihood decoding and list sphere decoding,'' IEICE General Conference, B-5-41, p. 528, March 2004. (in Japanese)
• Daisuke Nishikawa, Toshiaki Koike, and Susumu Yoshida, ``Computational complexity reduction scheme for MLD using expanded metric expression,'' IEICE General Conference, B-5-40, p. 527, March 2004. (in Japanese)
• Toshiaki Koike and Susumu Yoshida, ``Study on QR decomposition-based branch metric computation in trellis-coded spatial multiplexing transmission,'' IEICE Society Conference, B-5-19, p. 396, September 2003. (in Japanese)
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Space-time turbo equalization for space-time transmission systems using low density parity check code,'' IEICE General Conference, B-5-171, p. 630, March 2003. (in Japanese)
• Koutarou Shiizaki, Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Study on coding design of TCM for space-time transmission systems,'' IEICE General Conference, B-5-170, p. 629, March 2003. (in Japanese)
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Performance improvement of trellis-coded space-time transmission system with spatial interleave over fading channel,'' IEICE Society Conference, SA-2-1, pp. 207-208, September 2002. (in Japanese)
• Toshiaki Koike, Koutarou Shiizaki, Hidekazu Murata, and Susumu Yoshida, ``Experimental investigation focused on effect of trellis-coded modulation on performance of nonlinear cochannel interference canceller for TDMA transmission ,'' IEICE General Conference, B-5-100, p. 550, March 2002. (in Japanese)

Other Symposium and Workshop

• Toshiaki Koike, ``Research trend of wireless MIMO session in IEEE ICC'2007,'' IEICE Communications Society Magazine, no. 3, p. 25, Dec. 2007. (in Japanese)
• Kohei Kiyoshima, Toshiaki Koike, Kazuto Yano, and Susumu Yoshida, ``Study on weight generation method of MIMO-MMSE,'' The 28th Society of Information Theory and its Applications (SITA), Onna, Okinawa, pp. 459-462, November 2005.
• Shingo Enoki, Toshiaki Koike, Hidekazu Murata, and Kiyomichi Araki, ``Real-time communication equipments for wireless multihop cooperative networks,'' The 28th Society of Information Theory and its Applications (SITA), Onna, Okinawa, pp. 359-362, November 2005.
• Toshiaki Koike, ``Iterative equalization for extremely wideband spatial multiplexing,'' The 2nd COE student seminar, Kyoto, July 2005.
• Toshiaki Koike, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``Study on hardware implementation of MIMO-MLD for Gbps wireless Transmission,'' The 7th YRP Symposium on Cooperation between Industry, Academia and Government in Mobile Telecommunications, YRP, Yokosuka, June 2005.
• Masakazu Tanaka, Toshiaki Koike, and Susumu Yoshida, ``Connectivity evaluation of ITS inter-vehicle communications with multihop STBC cooperative relaying,'' The 27th Society of Information Theory and its Applications (SITA), Gero, Gifu, pp. 307-310, December 2004.
• Pham Bao Thi Ngoc, Takaaki Zakoji, Toshiaki Koike, Hidekazu Murata, Kiyomichi Araki, and Susumu Yoshida, ``Initial experiment of space-time coded cooperative relaying for multihop wireless communications,'' The 27th Society of Information Theory and its Applications (SITA), Gero, Gifu, pp. 295-298, December 2004.
• Toshiaki Koike, Hidekazu Murata, and Susumu Yoshida, ``Frequency-domain joint combining of delay and STBC diversity for quasi-synchronous multihop cooperative communications,'' The 27th Society of Information Theory and its Applications (SITA), Gero, Gifu, pp. 339-342, December 2004.
• Yukinaga Seki, Toshiaki Koike, Hidekazu Murata, Susumu Yoshida, and Kiyomichi Araki, ``Implementation of real-time MIMO-MLD by FPGA,'' The 27th Society of Information Theory and its Applications (SITA), Gero, Gifu, pp. 239-242, December 2004.
• Toshiaki Koike, ``High-speed signal processing and cooperative relaying for Gbps wireless communications,'' The 4th COE Student Seminar, Kyoto, November 2004.
• Daisuke Nishikawa, Toshiaki Koike, and Susumu Yoshida, ``A study on low complexity MLD in MIMO systems,'' The 6th YRP Symposium on Cooperation between Industry, Academia and Government in Mobile Telecommunications, YRP, Yokosuka, pp. 64-65, July 2004.
• Toshiaki Koike, ``Investigation of Joint-MLD for Distributed Cooperative Communications,'' The 2nd COE Student Seminar, Kyoto, January 2004.
• Toshiaki Koike and Susumu Yoshida, ``Experimental investigation of coded MIMO architecture employing spatial interleaver for multi-dimensional MLSE,'' Proc. of The 1st Singapore-Japan International Workshop on Info-Communications Technologies for the Ubiquitous Networked Society, Singapore, December 2003.
• Hidekazu Murata and Toshiaki Koike, ``Spatial multiplexing communication systems,'' Proc. of Microwave Workshops and Exhibition (MWE2003), Yokohama, Japan, pp. 187-192, November 2003.