Nokia Research Center

Publications

Sampling of papers

-IEEE publications, are listed here (download requires IEEE Xplore access).

Thesis: A. Hottinen, Linear space-time modulation in multiple-antenna channels, DSc dissertation, Helsinki University of Technology, 2004, For further information click here.

P1: A. Hottinen,“Self-organizing multiuser detection," Proc. IEEE International Symposium of Spread Spectrum Techniques and Applications, Oulu, Finland, June 1994

P2: P. A. Ranta, A. Hottinen and Z.-C. Honkasalo, “Co-channel interference cancelling receiver for TDMA mobile systems,” IEEE International Conference on Communications (IEEE ICC ’96), pp. 17-21, Seattle, USA, 1995

P3: A. Hottinen, H. Holma, and A. Toskala, “Performance of Multistage Multiuser Detection in a Fading Multipath Channel," Proc. IEEE Conf. on Personal, Indoor, and Mobile Communications, Toronto, Canada, September 1995.

P4: J. Joutsensalo, J. Lilleberg , A. Hottinen and J. Karhunen, “ A hierarchic maximum likelihood method for delay estimation in CDMA," Proc. 46th Vehicular Technology Conference, pp. 188-192, Atlanta, USA, 1996

P5: J. Joutsensalo, J. Lilleberg, A. Hottinen and J. Karhunen “Hierarchic method for CDMA  synchronization,” Proc IEEE Norsig, Espoo, 1996

P6: A. Hottinen and L. Holmström, “Projection pursuit for CDMA communications," Proc. 30th Annual Conference on Information Sciences and Systems (CISS’98), Princeton University, NJ, USA, March 1996

P7: A. Hottinen, H. Holma, and A. Toskala,“Multiuser detection for multirate CDMA communications," In Proc. International Conference on Communications (ICC), Dallas, TX, USA, June 1996

P8: A. Hottinen and K. Pehkonen, “A Flexible multirate Concept for CDMA systems," Proc. IEEE International Symposium of Spread Spectrum Techniques and Applications (IEEE ISSSTA), Maintz, Germany, September 1996

P9: T. Ojanperä, A. Hottinen , J.Lilleberg, K. Rikkinen, “Design of a 3rd generation CDMA system," Proc. IEEE International Symposium of Spread Spectrum Techniques and Applications (IEEE ISSSTA), Maintz, Germany, September 1996

P10: A. Hottinen, R. Wichman, and P. Soininen, “ On the Throughput of ALOHA in the presence of multiuser detection," In Proc. International Conference on Wireless Personal Communications, Mumbai, India, December 1997

P11: A. Hottinen and R. Wichman, “Utilization of spread ALOHA with multiuser detection," in Proc. International Symposium of Information Theory, Cambridge, Mass., USA, August 1998

P12: A. Hottinen, “ Iterative multiuser decoding in WCDMA systems," In Proc. Johns Hopkins Conferenece on Information Sciences and Systems, Baltimore, MD, March 1999.

P13: T. Heikkinen and A. Hottinen, “Capacity of a wireless network," 31st Annual Conference on Information Sciences and Systems (CISS’97), Baltimore, USA, March 1997

P14: T. Heikkinen and A. Hottinen, “ Space-time power allocation in CDMA networks," Proc. 32nd Annual Conference on Information Sciences and Systems (CISS’98), Princeton University, NJ, USA, March 1998

P15: C. Sengupta, A. Hottinen, J. Cavallaro and B. Aazhang, “Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems," 32nd Annual Conference on Information Sciences and Systems (CISS’98), Princeton University, NJ, USA, March 1996

P16: J. Joutsensalo, J. Lilleberg, A. Hottinen, and J. Karhunen,“Subspace Algorithms for Synchronization and Tracking in CDMA," Proc. IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC’97), Paris, France, April 1997, pp. 369-372

P17: M. O. Sunay, Z.-C. Honkasalo, A. Hottinen, H. Honkasalo and L. Ma, “A dynamic channel allocation based TDD DS CDMA residential indoor system," Proc. IEEE International conference on universal personal communications (ICUPC), San Diego, Ca., November 1997

P18: T. Heikkinen and A. Hottinen, “ On downlink power control with multi-antenna transmission," Proc. IEEE VTC 98, Ottawa, Canada, May 1998

P19: R. Wichman and A. Hottinen, “Soft multiuser detection for downlink CDMA communications in multipath fading channels," Proc. IEEE VTC, Ottawa, Canada, May 1998

P20: A. Hottinen and R. Wichman, “ Transmit diversity by antenna selection in CDMA downlink," Proc. IEEE ISSSTA, Sun City, South Africa, September 1998

P21: A. Hottinen, “ Blind iterative separation of CDMA signals by nonlinear independent component analysis," Proc. European Signal Processing Conference (EUSIPCO), Greece, September 1998.

P22: A. Correia, A. Hottinen, and R. Wichman, “Optimized constellations for transmit diversity," Proc. Vehicular Technology Conference, Amsterdam, September, 1999

P23: A. Hottinen and R. Wichman, “Soft-weighted transmit diversity for WCDMA," in Proc. Allerton Conference on Communications, Illinois, USA

P24: R. Wichman and A. Hottinen, “Transmit Diversity in the WCDMA System," Int. Journal of Wireless Information Networks, Volume 6, Number 3, July 1999

P25: A. Hottinen and R. Wichman, “Transmit diversity using filtered feedback weights in the FDD/WCDMA system," Proc. Int. Zurich Seminar on Communications, Zurich, Switzerland, Feb. 2000

P26: S. Bhashyam and A. Hottinen, “Performance of iterative multiuser decoding and channel estimation in WCDMA systems," in Proc. VTC-2000, Tokyo, May, 2000

P27: M. Raitola, A. Hottinen and R. Wichman,“Transmission diversity in wideband CDMA," in Proc. 49th IEEE Vehicular Technology Conference, May 16 - 19, 1999, Houston, Texas, USA 1999, 1545 - 1549

P28: O. Tirkkonen and A. Hottinen, “Diversity/self-interference tradeoff in non-orthogonal spacetime  block codes," Proc. URSI 2000, Colorado, USA

P29: O. Tirkkonen, A. Hottinen, "The algebraic structure of space-time block codes," Proc. Finnish Wireless Communications Workshop 2000 (FWCW’ 00), Oulu, Finland, pp. 80-84, May 2000

P30: A. Correia, A. Hottinen and R. Wichman, “Space-Time Transmitter Diversity Schemes for Wideband CDMA," in Proceedings of IEEE VTC2000, Tokyo, Japan, May 2000.

P31: A. Hottinen and O. Tirkkonen, “Iterative decoding and detection in a high data rate downlink channel, " Proc. NORSIG, Kolmorden, Sweden, June 2000

P32: A. Hottinen, O. Tirkkonen and R. Wichman, “Closed-loop transmit diversity techniques for multi-element tranceivers," Proc. VTC 2000, Boston, Mass. USA September 2000

P33: O. Tirkkonen, A. Hottinen, “Complex modulation space-time block codes for four Tx antennas,” Proc. Globecom 2000, San Francisco, CA, USA, November 2000

P34: B. Raghothaman, A. Boariu, O. Tirkkonen, A. Hottinen, "Performance of simple space-time block codes for more than two transmit antenna," Proc. Allerton Conf., September 2000

P35: O. Tirkkonen, A. Boariu, A. Hottinen, “Minimal non-orthogonality rate 1 space-time block code for 3+ Tx Antennas," IEEE sixth international symposium on spread spectrum techniques and applications (ISSSTA 2000), Parsippany, NJ, USA, pp. 429-432, September 2000.

P36: A. Correia, A. Hottinen,“Complex constellations for WCDMA with transmitter diversity,"IEEE sixth int. sym. spread spectrum techniques and applications, Volume 2, 6-8 Sept. 2000 Page(s):439 - 443 vol.2

P37: A. Hottinen, K. Kuchi, O. Tirkkonen, “A space-time coding concept for a multi-element transmitter," in Proc. Canadian Workshop on Information Theory, Vancouver, Canada, June, 2001

P38: A. Hottinen, R. Wichman, “Enhanced filtering for feedback mode transmit diversity," In Proc. Conf. Inf. Sci. Syst., Princeton, NJ, USA, March 2000

P39: A. Hottinen and O. Tirkkonen, “A randomization technique for non-orthogonal space-time block codes," In Proc. IEEE Vehicular Technolgy Conference, Rhodes, Greece, May 2001

P40: A. Hottinen, R. Wichman, “A closed-loop transmit diversity concept for WCDMA systems,"In Proc. Conf. Inf. Sci. Syst., Baltimore, MD, USA, March 2001

P41: A. Hottinen, O. Tirkkonen, and R. Wichman, “Multi-antenna transmission with feedback for WCDMA systems," in Proc. 3G Wireless, San Francisco, USA, May 2001.

P42: O. Tirkkonen and A. Hottinen, “Tradeoffs between rate, puncturing and orthogonality in space-time block codes," in Proc. ICC 01, Helsinki, Finland

P43: A. Hottinen, K. Kuchi and O. Tirkkonen, “A space-time coding concept for a multi-antenna transmitter," in Proc. Canadian Workshop on Information Theory, Vancouver, Ca., June 2001

P44: O. Tirkkonen and A. Hottinen, “Improved MIMO performance with non-orthogonal space-time block codes," Proc. GLOBECOM 2001, Texas, USA November 2001

P45: O. Tirkkonen and A. Hottinen, “Square matrix embeddable space-time block codes for complex signal constellations," IEEE Transactions on Information Theory, January 2002

P46: A. Hottinen and R. Wichman, “Asymmetric quantization of feedback beams in WCDMA," in Proc. CISS 2002, March 2002, Princeton, NJ

P47: A. Hottinen, J. Vesma, O. Tirkkonen, N. Nefedov, "High Bit Rates for 3G and Beyond Using MIMO Channels," in Proc. PIMRC 2002, Portugal

P48: A. Hottinen, J. Vesma, O. Tirkkonen, "High Bit Rates for HSDPA Using MIMO Channels," WSEAS Tr. Comm., July 2002

P49: A. Hottinen and O. Tirkkonen, “Non-orthogonal space-time block code with symbol rate two," In Proc. Conf. Inf. Sci. Syst., Baltimore, MD, USA, March 2002

P50: A. Hottinen and O. Tirkkonen,“Matrix modulation and adaptive retransmission," in Proc. ISSPA, Paris, France, July 2003

P51: A. Hottinen,“Multiuser scheduling with matrix modulation," in Proc. ISSPIT, Darmstadt, Germany, December 2003

P52: A. Hottinen,“Matrix-modulated closed-loop MIMO with multiuser scheduling," in Proc. CISS 2004, Princeton, NJ USA, March 2004

P53: A. Hottinen and O. Tirkkonen, “Precoder designs for high rate space–time block codes,"

in Proc. CISS 2004, Princeton, NJ USA, March 2004

P54: A. Hottinen, “Channel reciprocity for FDD systems using duplex hopping," in Proc. URSI convention on Radio Science, Nov. 2004

P55: S. Iraji, O. Tirkkonen, A. Hottinen and K. Kuchi, “Non-orthogonal space-time block code for multipath channels," in Proc. PIMRC 2004, Barcelona, Spain, September 2004

P56: O. Tirkkonen, M. Kokkonen, K. Kalliojarvi, A. Hottinen, J. Bonnet, “Adaptive space-time modulation for 4 4 MIMO," Proc. Nordic Radio Symposium, Oulu, Finland, 2004

P57: T. Heikkinen, T. Karageorgos, A. Yao and A. Hottinen,“Delay-differentiated scheduling in a wireless network," Proc. VTC 2005, Stockholm, Sweden, May 2005

P58: T. Heikkinen, T. Karageorgos and A. Hottinen, “Distributed scheduling in a wireless network," Proc. VTC 2005, Stockholm, Sweden, May 2005

P59: J. Bonnet. O. Tirkkonen and A. Hottinen, “Closed-loop modes for two high-rate linear space-time block codes," Proc. ICC 2005, Korea

P60: A. Hottinen, “Space-time retransmission in a time-selective channel" in Proc. CISS 2005, Baltimore, MD USA, March 2005

P61: K. Doppler and A. Hottinen, “Integration of amplify and forward relays in an OFDM network," in Proc Asilomar Conference, Calif., USA, Nov. 2005,

P62: T. Riihonen, K. Doppler, A. Hottinen, “Performance of spatially distributed large interference relay networks," Proc. IZS 2006, Zurich, Switzerland, Feb 22-24, 2006

P63: A. Hottinen, T. Heikkinen, "Subchannel assignment in OFDM relay nodes", Proc. 40th Annual Conference on information sciences and systems (CISS), Princeton University, NJ, USA, March 2006

P64: A. Hottinen, T. Heikkinen, "Scheduling in a randomized relay network", Proc. 40th Annual Conference on information sciences and systems (CISS), Princeton University, NJ, USA, March 2006

P65: A. Hottinen, T. Heikkinen, "Channel assignment in multi-antenna OFDM systems" Proc. European Wireless, Athens, Greece, April 2006

P66: A. Hottinen, T. Heikkinen, “Subcarrier allocation in a multiuser MIMO channel using linear programming " (invited paper) proc. EUSIPCO 2006, Florence, Italy, Sept. 2006

P67: K. Doppler, A. Hottinen,“Multi-antenna relay nodes in OFDM Systems," In Proc. ISWSC, Portugal, 2006

P68: A. Hottinen, K. Hugl, C. Zhang, M. Kuusela and B. Raghothaman, "Industrial embrace of smart antenna and MIMO," IEEE Wireless Communications, August 2006, Vol. 13 No. 4

P69: A. Hottinen, Y. Hong, E. Viterbo, C. Mehlfuhrer and C. F. Mecklenbrauker, "A comparison of high rate algebraic and non-orthogonal STBCs," Proc. ITG/IEEE Workshop on Smart Antennas, Vienna, Austria, February 2007

P70: A. Hottinen, T. Heikkinen, “Optimal subchannel assignment in a two-hop OFDM relay," Proc. SPAWC 2007, Helsinki, Finland, June 17-20, 2007

P71: A. Hottinen, T. Heikkinen, “Delay-differentiated scheduling in a randomized relay network," (invited paper) Proc. EUSIPCO 2007, Pozdam, Poland, Sept. 2007

P72: T. Heikkinen and A. Hottinen, “Distributed subchannel assignment in a multiuser MIMO relay," in Proc. Gamecomm, Nantes, France, October 2007

P73: A. Hottinen and T. Heikkinen, “Distributed subchannel assignment in an OFDMA relay," in Proc. Valuetools, Nantes, France, October 2007

P74: T. Riihonen, R. Wichman,J. Hamalainen, and A. Hottinen, “Analysis of subcarrier pairing in a cellular OFDMA relay link. " Proc. International ITG Workshop on Smart Antennas, 2008 (WSA 2008), Darmstadt, Germany, 26–27 Feb. 2008

P75: A. Hottinen and E. Viterbo, “Optimal user pairing in downlink MU-MIMO with transmit precoding," in Proc. RAWNET, Berlin, Germany, March 2008 (invited paper)

P76: T. Heikkinen and A. Hottinen, “Delay-differentiated scheduling in a fading channel," IEEE Transactions on Wireless Communications, Vol. 7, No. 3, March 2008

P77: E. Viterbo and A. Hottinen, “Optimal user pairing for multiuser MIMO," ISSSTA 2008, Bologna, Italy, August 2008 (to appear)

P78: M. Shafi, H. Huang, A. Hottinen, P. J. Smith and R. A. Valenzuela, “MIMO systems and applications: field experience, practical aspects, limitations and challenges," IEEE JSAC, Vol. 26, No. 6, August 2008 (Guest editorial)

P79: T. Heikkinen and A. Hottinen, “Distributed Scheduling via Pricing with Partial Orthogonality," 6th International Conference on Mobile Computing and Multimedia (MoMM’2008),24-26 November, 2008,Linz, Austria

P80: A. Hottinen, O.Tirkkonen and R. Wichman, Multi-antenna transceiver techniques for 3G and beyond, John Wiley and Sons, Chichester, England, January 2003

P81: P. Fertl, A. Hottinen and G. Matz,“Perturbation-based distributed beamforming for wireless relay networks," IEEE GLOBECOM 2008, New Orleans, November, 2008 (to appear)

P82: A. Hottinen, E. Viterbo and T. Heikkinen, “Device collaboration in ad-hoc MIMO networks," WSA 2009, Berlin, Germany

P83: Howard Huang, Matteo Trivellato, Ari Hottinen, Mansoor Shafi, Peter J. Smith, Reinaldo A. Valenzuela, “Increasing downlink cellular throughput with limited network MIMO coordination," IEEE TR. Wireless Communications, June 2009

P84: T. Heikkinen and A. Hottinen, “Distributed scheduling in a time-varying ad-hoc network," Journal of Mobile Multimedia 5(3): 238-254, 2009

P85: P. Fertl, A. Hottinen and G. Matz “A multiplicative weight perturbation scheme for distributed beamforming in wireless relay networks with 1-bit feedback," in Proc. of the IEEE Conference on Acoustics, Speech and Signal Processing (ICASSP 2009), Taipei, Taiwan, April, 2009

P86: J. Pajarinen, J. Peltonen, M. Uusitalo, A. Hottinen, “Latent state models of primary user  behavior for opportunistic spectrum access" in Proc. of the IEEE PIMRC 2009, Japan, 2009

P87: J. Pajarinen, J. Peltonen, A. Hottinen and M. A. Uusitalo, “Efficient planning in large POMDPs through policy graph based factorized approximations, (to appear) Proc. European Conference on Machine Learning, Barcelona, Spain, Sept. 2010

P88: T. Heikkinen and A. Hottinen, “Distributed subchannel assignment in a two-hop network," in Computer Networks (ELSEVIER), 2010

Patents

About 65-70 granted patent families for distinct inventions (see e.g.  my US patents). About 300 patents granted worldwide.

Granted patents are mostly related to space-time coding, MIMO, multiuser receivers (multiuser detection and chip equalization), beamforming, etc