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Dr.-Ing. Martin Schubert

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Contact:
Room: G110
Telephone: +49(0)30-31002-870
Email: firstname.lastname(at)hhi.fraunhofer.de
Dr.-Ing. Martin Schubert
Teaching:
Winter term
lecture VL Array-Signalverarbeitung für die Mobilkommunikation
Research interests:
  • Joint optimization of physical layer and link layer
  • Signal processing and information-theoretical aspects of MIMO channels
  • Dynamic resource allocation
  • Interference management
  • Game Theory applied to communication networks
  • Cooperative strategies for interference management, with application to multi-cellular networks
  • Convex optimization
  • Capacity and fairness issues
  • Self-organizing wireless networks and relaying strategies

Biography

Martin Schubert is senior research scientist at the FhG-HHI. He obtained the doctoral degree with highest honors from Technische Universität, Berlin, Germany, in 2002. Since 2003 he is project leader at HHI and lecturer at the Technical University of Berlin. M. Schubert has 10 years experience in the modeling and optimization of interference-coupled wireless networks, and the development of iterative algorithms for adaptive interference mitigation and resource allocation. He has published 2 books, 5 book chapters, around 120 papers and several patents in the areas of wireless communications, signal processing, and networking. In 2007, M. Schubert was a co-recipient of the VDE Johann-Philipp-Reis Award for outstanding, innovative contributions to the field of telecommunication. He co-authored the 2007 Best Paper Award of the IEEE Signal Processing Society. He was co-organizer of the VDE/ITG Workshop on Smart Antennas 2009 in Berlin. Since 2009 he is Associate Editor of the IEEE Transactions of Signal Processing. Dr. Schubert has led HHI activities in various projects, with a total volume of 225 person-months. This includes industrial co-operations, BMBF-funded projects and EU-funded projects MASCOT and SAPYHRE.

List of Publications

Books and Bookchapters

  1. Martin Schubert and Holger Boche. Advanced Network Calculus - A General Framework for Interference Management and Network Utility Optimization. Lecture Notes in Computer Science. Springer, 2010. to appear.
  2. W. Zirwas, R. Halfmann, T. Haustein, V. Jungnickel, W. Mennerich, J. Luo, L. Thiele, and M. Schubert. Chapter on LTE field trial measurements. In Borko Furht and Syed A. Ahson, editors, Handbook of Long Term Evolution of 3GPP Radio Technology. CRC Press, Taylor & Francis Group, January 2009.
  3. Martin Schubert. Chapter 6: Multiuser MIMO techniques. In MIMO: from Theory to Implementation. COST 2100 Programme, 2009. to appear.
  4. Holger Boche, Siddharth Naik, and Martin Schubert. Chapter 9: Axiomatic framework for resource allocation under fairness and efficiency constraints. In ICT Shaping the World. John Wiley & Sons Ltd, 2009.
  5. W. Zirwas, J.-H. Kim, V. Jungnickel, M. Schubert, T. Weber, A. Ahrens, and M. Haardt. Distributed organization of cooperative antenna systems. In H. Hu, Y. Zhang, and J. Luo, editors, Distributed Antenna Systems: Open Architecture for Future Wireless Communications. CRC Press, 2007. ISBN: 1420042882.
  6. Holger Boche and Martin Schubert. Duality theory for uplink downlink multiuser beamforming. In Smart Antennas - State-of-the-Art. EURASIP, Hindawi Publishing Corp., 2006.
  7. Martin Schubert and Holger Boche. QoS-Based Resource Allocation and Transceiver Optimization, volume 2. Foundations and Trends in Communications and Information Theory. 2005/2006.

This file was generated by bibtex2html 1.94.

Journal Papers

  1. H. Boche and M. Schubert. A unifying approach to interference modeling for wireless networks. IEEE Trans. Signal Processing, 58(6):3282-8297, June 2010.
  2. Holger Boche, Siddharth Naik, and Martin Schubert. Pareto boundary of utility sets for multiuser wireless systems. IEEE/ACM Trans. on Networking, 2010.
  3. Holger Boche, Siddharth Naik, and Martin Schubert. Combinatorial characterization of interference coupling in wireless systems. IEEE Trans. Commun., 2010.
  4. H. Boche and M. Schubert. A generalization of Nash bargaining and proportional fairness to log-convex utility sets with power constraints. IEEE Trans. Inform. Theory, 2010. in print.
  5. Holger Boche and Martin Schubert. Perron-root minimization for interference-coupled systems with adaptive receive strategies. IEEE Trans. Commun., 57(10):3173-3164, October 2009.
  6. Holger Boche and Martin Schubert. Nash bargaining and proportional fairness for wireless systems. IEEE/ACM Trans. on Networking, 17(5):1453-1466, October 2009.
  7. Holger Boche and Martin Schubert. A calculus for log-convex interference functions. IEEE Trans. Inform. Theory, 54(12):5469-5490, December 2008.
  8. Holger Boche and Martin Schubert. The structure of general interference functions and applications. IEEE Trans. Inform. Theory, 54(11):4980 - 4990, November 2008.
  9. Holger Boche and Martin Schubert. Concave and convex interference functions - general characterizations and applications. IEEE Trans. Signal Processing, 56(10):4951-4965, October 2008.
  10. Shuying Shi, Martin Schubert, and Holger Boche. Rate optimization for multiuser MIMO systems with linear equalization. IEEE Trans. Signal Processing, 56(8):4020-4030, August 2008.
  11. Shuying Shi, Martin Schubert, and Holger Boche. Downlink MMSE transceiver optimization for multi-user MIMO systems: MMSE balancing. IEEE Trans. Signal Processing, 56(8):3702-3712, August 2008.
  12. Holger Boche and Martin Schubert. A superlinearly and globally convergent algorithm for power control and resource allocation with general interference functions. IEEE/ACM Trans. on Networking, 16(2):383-395, April 2008.
  13. Shuying Shi, Martin Schubert, and Holger Boche. Downlink MMSE transceiver optimization for multi-user MIMO systems: Duality and sum-MSE minimization. IEEE Trans. Signal Processing, 55(11):5436-5446, November 2007.
  14. Martin Schubert and Holger Boche. A generic approach to QoS-based transceiver optimization. IEEE Trans. Commun., 55(8):1557 - 1566, August 2007.
  15. Holger Boche and Martin Schubert. On the structure of the multiuser QoS region. IEEE Trans. Signal Processing, 55(7):3484-3495, July 2007.
  16. Holger Boche and Martin Schubert. Resource allocation in multi-antenna systems - achieving max-min fairness by optimizing a sum of inverse SIR. IEEE Trans. Signal Processing, 54(6):1990-1997, June 2006. 2007 Best Paper Award of the IEEE Signal Processing Society.
  17. Holger Boche and Martin Schubert. A general theory for SIR-balancing. EURASIP Journal on Wireless Communications and Networking, 2006. http://www.hindawi.com/journals/wcn/, Article ID 60681, 18 pages.
  18. Martin Schubert and Holger Boche. Iterative multiuser uplink and downlink beamforming under SINR constraints. IEEE Trans. Signal Processing, 53(7):2324- 2334, July 2005.
  19. Martin Schubert and Holger Boche. Comparison of infinity-norm and 1-norm optimization criteria for SIR-balanced beamforming. Signal Processing (Elsevier Science), 84(2):367-378, February 2004.
  20. Martin Schubert and Holger Boche. Solution of the multi-user downlink beamforming problem with individual SINR constraints. IEEE Trans. Veh. Technol., 53(1):18-28, January 2004.
  21. Holger Boche and Martin Schubert. Optimal multi-user interference balancing using transmit beamforming. Wireless Personal Communications, 26(4):305-324, September 2003.
  22. Holger Boche and Martin Schubert. Analysis of SIR-based downlink beamforming. IEICE Trans. Commun., E85-B(6):1160-1168, June 2002.
  23. Holger Boche and Martin Schubert. Theoretical and experimental comparison of optimization criteria for downlink beamforming. European Trans. on Telecomm. (ETT), 12(5):417-426, September 2001. (invited).
  24. Holger Boche and Martin Schubert. Linear antenna array beamforming with interpolation methods. Frequenz, Journal of Telecommunications, 53:73-83, March 1999.
  25. Holger Boche and Martin Schubert. On the narrow-band assumption for array-signal processing. International Journal of Electronics and Communication (AEÜ), 53(2):117-120, March 1999.
  26. Thomas Kuhwald, Holger Boche, and Martin Schubert. Beam forming with circular antenna arrays for indoor mobile communication systems. Journal of Electrical Engineering, 50(5-6), 1999.

This file was generated by bibtex2html 1.94.

Conference Papers

  1. Kristoffer Eriksson, Shuying Shi, Nikola Vucic, Martin Schubert, and Erik Larsson. Globally optimal resource allocation for achieving maximum weighted sum rate. In Proc. Globecom, Miami, USA, December 2010.
  2. M. Schubert, N. Vucic, and H. Boche. Sir balancing for strongly connected interference networks - existence and uniqueness of a solution. In Proc. The Seventh International Symposium on Wireless Communication Systems (ISWCS), York, United Kingdom, September 2010.
  3. Nikola Vucic, Shuying Shi, and Martin Schubert. DC programming approach for resource allocation in wireless networks. In Proc. Rawnet, June 2010.
  4. Eduard Jorswieck, Hrjehor Mark, Alexandr Kuzminskiy, Federico Boccardi, Leonardo Badia, Michele Zorzi, Jan Sykora, David Gesbert, Ka-Ming Ho, Martin Schubert, Andreas Kortke, Lefteris Karipidis, Erik Larsson, Valerio Palestini, Paolo Priotti, Bram van den Ende, Peter Trommelen, Florian Römer, Martin Haardt, Maciej Nawrocki, and Radoslaw Piesiewicz. Resource sharing in wireless networks: The saphyre approach. In Proc. Future Network & Mobile Summit 2010, Florence, Italy, June 2010.
  5. H. Boche and M. Schubert. A unified framework for interference modeling for multi-user wireless networks. In Proc. IEEE Int. Conf. on Comm. (ICC), Dresden, Germany, June 2009.
  6. H. Boche and M. Schubert. Complete characterization of the pareto boundary of interference coupled wireless systems with power constraints - the log-convex case. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Taipeh, Taiwan, April 2009.
  7. S. Shi, M. Schubert, N. Vucic, and H. Boche. MMSE optimization with per-base-station power constraints for network MIMO systems. In Proc. IEEE Int. Conf. on Comm. (ICC), Beijing, China, May 2008.
  8. Martin Schubert and Holger Boche. Nash bargaining and proportional fairness for log-convex utility sets. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Las Vegas, USA, April 2008.
  9. Shuying Shi, Martin Schubert, and Holger Boche. Physical layer multicasting with linear MIMO transceivers. In Conf. on Information Sciences and Systems (CISS), March 2008.
  10. Shuying Shi, Martin Schubert, and Holger Boche. Per-antenna power constrained rate optimization for multiuser MIMO systems. In ITG/IEEE Workshop on Smart Antennas (WSA), Darmstadt, Germany, February 2008.
  11. Holger Boche, Siddharth Naik, and Martin Schubert. Structure of solutions of resource allocation problems under general fairness constraints. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Las Vegas, USA, 2008.
  12. Holger Boche, Martin Schubert, Nikola Vucic, and Siddharth Naik. Non-symmetric Nash bargaining solution for resource allocation in wireless networks and connection to interference function calculus. In Proc. European Signal Processing Conference (EUSIPCO), Poznań, Poland, September 2007. (invited).
  13. Holger Boche, Siddharth Naik, and Martin Schubert. Characterization of dictatorial and egalitarian solutions of wireless resource allocation problems and consequences for cross-layer design. In IEEE International Workshop on Cross Layer Design (IWCLD 2007), Jinan, China, September 2007. (invited).
  14. Martin Schubert and Holger Boche. Properties and operational characterization of proportionally fair resource allocation. In Proc. IEEE Internat. Workshop on Signal Processing Advances for Wireless Comm. (SPAWC), Helsinki, Finland, June 2007. (invited).
  15. Holger Boche and Martin Schubert. Multiuser interference balancing for general interference functions - a convergence analysis. In Proc. IEEE Int. Conf. on Comm. (ICC), Glasgow, Scotland, pages 4664-4669, June 2007.
  16. Holger Boche and Martin Schubert. Advanced interference calculus - a general framework for interference coordination. In Proc. IEEE Internat. Workshop on Signal Processing Advances for Wireless Comm. (SPAWC), Helsinki, Finland, June 2007. (invited).
  17. Holger Boche and Martin Schubert. Characterization of the structure of general interference functions. In Proc. IEEE Int. Symp. on Inf. Theory (ISIT), Nice, France, June 2007.
  18. Holger Boche and Martin Schubert. On the existence of a proportionally fair operating point for wireless communication systems. In Proc. IEEE Internat. Workshop on Signal Processing Advances for Wireless Comm. (SPAWC), Helsinki, Finland, June 2007.
  19. W. Zirwas, Lars Thiele, Volker Jungnickel, and Martin Schubert. Cooperative antenna concepts for interference mitigation. In Proc. European Wireless Conf., Paris, France, April 2007.
  20. Shuying Shi, Martin Schubert, and Holger Boche. Capacity balancing for multiuser MIMO systems. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Hawaii, USA, April 2007.
  21. Holger Boche and Martin Schubert. The supportable QoS region of a multiuser system with log-convex interference functions. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Hawaii, USA, April 2007.
  22. Shuying Shi, Martin Schubert, and Holger Boche. Weighted sum-rate optimization for multiuser MIMO systems. In Conf. on Information Sciences and Systems (CISS), March 2007.
  23. Holger Boche, Martin Schubert, and Slawomir Stańczak. Proportionally fair resource allocation for wireless networks. In ITG/IEEE Workshop on Smart Antennas (WSA), Vienna, Austria, February 2007.
  24. Holger Boche, Martin Schubert, Eduard A. Jorswieck, and Aydin Sezgin. A general framework for concave/convex interference coordination problems and network utility optimization. In ITG/IEEE Workshop on Smart Antennas (WSA), Vienna, Austria, February 2007.
  25. Holger Boche and Martin Schubert. Iterative power control and resource allocation for general interference functions - a superlinearly convergent algorithm. In Proc. IEEE Conf. on Decision and Control, San Diego, USA, December 2006.
  26. Shuying Shi, Martin Schubert, and Holger Boche. Transceiver optimization for multi-user MIMO systems: Min-max relative user-MSE under total power constraint. In Proc. IEEE Int. Symp. on Inf. Theory and Applications (ISITA) , Seoul, Korea, November 2006.
  27. Shuying Shi, Martin Schubert, and Holger Boche. Computational efficient transceiver optimization for multiuser MIMO systems: Power minimization with user-MMSE requirements. In Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, November 2006.
  28. Martin Schubert, Holger Boche, and Slawomir Stańczak. Strict convexity of the QoS feasible region for log-convex interference functions. In Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, November 2006.
  29. Holger Boche, Martin Schubert, and Marcin Wiczanowski. An algebra for log-convex interference functions. In Proc. IEEE Int. Symp. on Inf. Theory and Applications (ISITA) , Seoul, Korea, November 2006.
  30. Martin Schubert and Holger Boche. Robust resource allocation. In Proc. IEEE Information Theory Workshop (ITW), Chengdu, China, pages 556-560, October 2006.
  31. Shuying Shi, Martin Schubert, and Holger Boche. Downlink MMSE transceiver optimization with layer-MSE requirements. In ChinaCom, Beijing, China, October 2006.
  32. Martin Schubert, Shuying Shi, and Holger Boche. Iterative transceiver optimization for linear multiuser MIMO channels with per-user MMSE requirements. In Proc. European Signal Processing Conference (EUSIPCO), September 2006. (invited).
  33. Holger Boche and Martin Schubert. Convergence behavior of matrix-based iterative transceiver optimization. In Proc. IEEE Internat. Workshop on Signal Processing Advances for Wireless Comm. (SPAWC), Cannes, France, July 2006.
  34. W. Zirwas, E. Schulz, J. H. Kim, V. Jungnickel, and M. Schubert. Distributed organization of cooperative antenna systems. In European Wireless, Athens, Greece, April 2006.
  35. Shuying Shi and Martin Schubert. Iterative MMSE optimization for multiuser MIMO systems. In ITG/IEEE Workshop on Smart Antennas (WSA), Ulm, Germany, March 2006.
  36. Yan Gao and Martin Schubert. Power allocation for multi-group multicasting with beamforming. In ITG/IEEE Workshop on Smart Antennas (WSA), Ulm, Germany, March 2006.
  37. Yan Gao and Martin Schubert. Group-oriented beamforming for multi-stream multicasting based on quality-of-service requirements. In Proc. Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), December 2005.
  38. Shuying Shi and Martin Schubert. Convexity analysis of the feasible MSE region of sum-power constrained multiuser MIMO systems. In Proc. IEEE Internat. Symp. on Personal, Indoor and Mobile Radio Communications (PIMRC), Berlin, Germany, September 2005.
  39. Martin Schubert, Shuying Shi, Eduard A. Jorswieck, and Holger Boche. Downlink sum-MSE transceiver optimization for linear multi-user MIMO systems. In Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, September 2005.
  40. Martin Schubert and Holger Boche. QoS control for multiuser networks - a joint approach to receiver design and resource allocation. In Internat. Teletraffic Congress (ITC), Bejing, China, September 2005.
  41. Holger Boche and Martin Schubert. Network-centric versus user-centric resource allocation in wireless networks. In Proc. Wireless Personal Multimedia Communications (WPMC), Aalborg, Denmark, September 2005. (invited).
  42. Martin Schubert, Holger Boche, and Slawomir Stańczak. Joint power control and multiuser receiver design - fairness issues and cross-layer optimization. In IST Summit 2005, Dresden, Germany, June 2005.
  43. Holger Boche and Martin Schubert. SIR balancing and Perron root optimization - are these problems really equivalent? In Canadian Workshop on Information Theory (CWIT), Montreal, June 2005.
  44. Nikola Vucic and Martin Schubert. Antenna selection for BER performance improvement in multi-antenna systems with MMSE-SIC detection. In Proc. IEEE Vehicular Techn. Conf. (VTC) Stockholm, Sweden, May 2005.
  45. Martin Schubert and Shuying Shi. MMSE transmit optimization with interference pre-compensation. In Proc. IEEE Vehicular Techn. Conf. (VTC) Stockholm, Sweden, May 2005.
  46. Holger Boche, Martin Schubert, and Slawomir Stańczak. A unifying approach to multiuser receiver design under QoS constraints. In Proc. IEEE Vehicular Techn. Conf. (VTC) Stockholm, Sweden, May 2005.
  47. Holger Boche and Martin Schubert. Resource allocation for multi-antenna multi-user systems. In Proc. IEEE Int. Conf. on Comm. (ICC), Seoul, South Korea, May 2005.
  48. Holger Boche and Martin Schubert. Characterization of the QoS feasibility region of multiuser systems - the complete SIR-balancing theory. In ITG/IEEE Workshop on Smart Antennas (WSA), Duisburg/Essen, Germany, April 2005.
  49. Shuying Shi and Martin Schubert. MMSE transmit optimization for multiuser multiantenna systems. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Philadelphia, USA, March 2005.
  50. Holger Boche, Marcin Wiczanowski, and Martin Schubert. Interference topology in wireless networks - supportable QoS region and max-min fairness. In Conf. on Information Sciences and Systems (CISS), Baltimore, USA, March 2005.
  51. Holger Boche, Martin Schubert, Slawomir Stańczak, and Marcin Wiczanowski. An axiomatic approach to resource allocation and interference balancing. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Philadelphia, USA, March 2005.
  52. Holger Boche and Martin Schubert. A semialgebraic approach to multiuser beamforming and power control. In Proc. IEEE Int. Symp. on Inf. Theory (ISIT), Chicago, USA, June 2004.
  53. Shuying Shi and Martin Schubert. Precoding and power loading for multiantenna broadcast channels. In Conf. on Information Sciences and Systems (CISS), Princeton, USA, March 2004.
  54. Martin Schubert and Holger Boche. User ordering and power allocation for optimal multiantenna precoding/decoding. In ITG/IEEE Workshop on Smart Antennas (WSA), Munich, Germany, March 2004.
  55. Eduard A. Jorswieck, Holger Boche, and Martin Schubert. Analysis of multiuser MIMO systems with MMSE receiver based on worst case noise. In ITG/IEEE Workshop on Smart Antennas (WSA), Munich, Germany, March 2004.
  56. Holger Boche and Martin Schubert. Effective bandwidth maximization for uplink/downlink multi-antenna systems. In Proc. IEEE Int. Conf. on Comm. (ICC), Anchorage, USA, pages 3215 - 3219 vol.5, May 2003.
  57. Martin Schubert, Dimitrios Karadoulamas, Holger Boche, and Gerald Lehmann. Joint downlink beamforming and power control for 3G WCDMA. In Proc. IEEE Vehicular Techn. Conf. (VTC) spring, Jeju, Korea, pages 331 - 335 vol.1, April 2003.
  58. Thomas Haustein, Martin Schubert, and Holger Boche. On power reduction strategies for the multi-user downlink with decentralized receivers. In Proc. IEEE Vehicular Techn. Conf. (VTC) spring, Jeju, Korea, pages 1007 - 1011 vol.2, April 2003.
  59. Holger Boche, Martin Schubert, and Eduard A. Jorswieck. Throughput maximization for the multiuser MIMO broadcast channel. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Hong Kong, pages 808-811 vol.4, April 2003. (invited).
  60. Holger Boche and Martin Schubert. Analysis of different precoding/decoding strategies for multiuser beamforming. In Proc. IEEE Vehicular Techn. Conf. (VTC) spring, Jeju, Korea, pages 39 - 43 vol.1, April 2003.
  61. Martin Schubert and Holger Boche. Throughput maximization for uplink and downlink beamforming with independent coding. In Conf. on Information Sciences and Systems (CISS), Baltimore, USA, March 2003.
  62. Holger Boche, Martin Schubert, and Eduard A. Jorswieck. Trace balancing for multiuser MIMO downlink transmission. In Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, pages 1379 - 1383 vol.2, November 2002.
  63. Martin Schubert and Holger Boche. Joint `dirty paper' pre-coding and downlink beamforming. In Proc. IEEE Internat. Symp. on Spread Spectrum Techniques and Applications (ISSSTA), Prague, Czech Republic, volume 2, pages 536-540, September 2002.
  64. Holger Boche and Martin Schubert. A general duality theory for uplink and downlink beamforming. In Proc. IEEE Vehicular Techn. Conf. (VTC) fall, Vancouver, Canada, pages 87 - 91 vol.1, September 2002.
  65. Holger Boche and Martin Schubert. Comparison of infinity-norm and 1-norm optimization for multi-antenna downlink transmission. In Proc. IEEE Int. Symp. on Inf. Theory (ISIT), Lausanne, Switzerland, page 452, June 2002.
  66. Martin Schubert and Holger Boche. An efficient algorithm for optimum joint downlink beamforming and power control. In Proc. IEEE Vehicular Techn. Conf. (VTC) spring, Birmingham, USA, volume 4, pages 1911-1915, May 2002.
  67. Holger Boche and Martin Schubert. Optimum SIR balancing using extended 1-norm beamforming optimization. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Orlando, USA, pages 2945-2948 vol.3, May 2002.
  68. Martin Schubert and Holger Boche. SIR balancing for multiuser downlink beamforming - a convergence analysis. In Proc. IEEE Int. Conf. on Comm. (ICC). New York, USA, pages 841 - 845 vol.2, April 2002.
  69. Holger Boche and Martin Schubert. Solution of the SINR downlink beamforming problem. In Conf. on Information Sciences and Systems (CISS), Princeton, USA, March 2002.
  70. Martin Schubert and Holger Boche. A unifying theory for uplink and downlink multi-user beamforming. In Proc. IEEE Intern. Zurich Seminar, Switzerland, February 2002.
  71. Holger Boche and Martin Schubert. Multi-antenna downlink transmission with individual SINR receiver constraints for cellular wireless systems. In Proc. ITG Conf. on Source and Channel Coding, Berlin, Germany, pages 159-166, January 2002.
  72. Martin Schubert and Holger Boche. Solvability of coupled downlink beamforming problems. In Proc. IEEE Globecom, San Antonio, USA, pages 614 - 618 vol.1, November 2001.
  73. Martin Schubert and Holger Boche. CIR-based multiuser downlink beamforming. In Proc. 10th Aachen Symposium on Signal Theory, pages 237-242, September 2001.
  74. Holger Boche and Martin Schubert. A new approach to power adjustment for spatial covariance based downlink beamforming. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Salt Lake City, USA, pages 2957 - 2960 vol.5, May 2001.
  75. Martin Schubert and Holger Boche. Leistungsoptimiertes Downlinkbeamforming für zellulare Mobilfunksysteme. In Proc. ITG Diskussionssitzung Antennen für mobile Systeme, Ilmenau, Germany, pages 113-122, March 2001.
  76. Holger Boche and Martin Schubert. Optimales Downlink Beamforming für CDMA-Systeme und Konsequenzen zur Unterstützung unterschiedlicher SIR-Anforderungen von Mobilstationen. In Proc. ITG-Diskussionssitzung Antennen für Mobile Systeme 2000, Starnberg, Germany, October 2000.
  77. Holger Boche and Martin Schubert. Performance analysis of downlink beamforming algorithms. In Proc. MICRO.tec, Hanover, Germany, pages V2/161-166, September 2000.
  78. Holger Boche and Martin Schubert. The impact of the user distribution on the space-time matched filter. In Proc. European Wireless 2000, Dresden, Germany, pages 49-54, September 2000. (invited).
  79. Holger Boche and Martin Schubert. Capacity improvement of CDMA-based mobile communication systems using linear antenna arrays - theoretical and experimental results. In Proc. Midwest Symposium on Circuits and Systems, MWSCAS 2000, Lansing, USA, pages 540 - 543 vol.2, August 2000.
  80. Martin Schubert and Holger Boche. Downlink beamforming for TD/CDMA multipath channels. In Proc. IEEE Internat. Conf. on Acoustics, Speech, and Signal Proc. (ICASSP), Istanbul, Turkey, pages 2993 - 2996 vol.5, June 2000.
  81. Holger Boche and Martin Schubert. Space-time rake receiver with optimal beamforming for the uplink of CDMA-based wireless systems. In Proc. Internat. Symp. on Circuits and Systems (ISCAS), pages 109-112 vol.3, Geneva, Switzerland, May 2000.
  82. Martin Schubert and Holger Boche. On the directivity as a performance criterion for constrained beamforming algorithms. In Proc. European Wireless Conf., Munich, Germany, pages 69-73, October 1999.
  83. Holger Boche and Martin Schubert. Investigation of up-link and down-link performance of directivity controlled constrained beamforming algorithms for CDMA-based systems. In Proc. CIC99, Seoul, Korea, September 1999. (invited).
  84. Holger Boche and Martin Schubert. Analysis of performance parameters for blind constrained beam-forming. In Proc. IEEE Workshop, Günzburg/Germany, pages 89-94, July 1999.
  85. Martin Schubert and Holger Boche. On the directivity of constrained linear antenna arrays. In Proc. Internat. Telecommunications Conference (ICT99), Jeju, Korea, June 1999.
  86. Holger Boche and Martin Schubert. On the narrow-band assumption for array-signal processing. In Proc. Internat. Telecommunications Conference (ICT99), Jeju, Korea, June 1999.
  87. Martin Schubert and Holger Boche. Einflußvon Fehlern der Richtungsschätzung auf das Verhalten von Constrained Beamformern und Konsequenzen für die Bit-Fehler-Rate des Uplink-Kanals für CDMA-basierte Mobilfunksysteme. In Proceedings ITG-Fachtagung Meßverfahren im Mobilfunk, Günzburg/Germany, March 1999.
  88. Thomas Kuhwald, Holger Boche, and Martin Schubert. Optimum Beam Forming for Indoor Applications of Antenna Arrays. In DFG-Workshop Indoor-Mobilkommunikation, Kassel, October 1998.
  89. Holger Boche and Martin Schubert. Beamforming von Antennenarrays mit Interpolationsverfahren. In Proc. 43. Intern. Wiss. Kolloquium, TU Ilmenau, September 1998.

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Patents

  1. M. Schubert, Y. Gao, W. Zirwas, and E. Schulz. Funkkommunikation unter Verwendung von Relays. patent DE 10 2005023322.6, 2006.
  2. S. Shi, M. Schubert, and H. Boche. Signalverarbeitungsverfahren zur Interferenzreduktion in einer digitalen Punkt-zu-Mehrpunkt-Sendeverbindung. patent DE 102004013866., 2005.
  3. M. Schubert and H. Boche. Verfahren zur leistungsoptimierten Strahlformung eines einer Basisstation zugehörigen Antennenarrays für zellulare Mobilfunksysteme im Downlink-kanal. German patent DE-10203593.8-35 (rights signed over to Siemens), 2004.
  4. M. Schubert and H. Boche. Verfahren und Anordnung zur Strahlformung für den Downlink-kanal in CDMA-basierten mobilfunksystemen. German patent DE-19943688, (European patent filed, No. EP 1214798), 2003.
  5. M. Schubert and H. Boche. Verfahren und Anordnung zur Strahlformung eines Rake-Empfängers für den Ein-Nutzer-Empfang für den Uplink-Kanal in Mobilfunksystemen. German patent DE-19943687, (European patent filed, No. EP 1214797), 2003.

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