Multi-Input Multi-Output Radio Communications

The use of multi-element antenna arrays in wireless radio-frequency links promises an enormous increase in throughput. Theoretical results indicate that a link using N transmitting and N receiving antennas can achieve an information-theoretic capacity as high as N times that of a single-input, single-output link. Our research has addressed several issues through analysis and simulation. We have quantified the impact of spatially correlated fading on link capacity, and have studied various strategies for allocation of power among transmitting elements in the presence of this fading correlation. We have studied layered space-time codes, which can achieve bit rates close to capacity, while maintaining manageable decoding complexity. In particular, we have analyzed the performance of layered space-time codes in slow and fast fading environments, and have proposed a set of design criteria for these codes.

D. Shiu, G. J. Foschini, M. J. Gans and J. M. Kahn, "Fading Correlation and its Effect on the Capacity of Multi-Element Antenna Systems", IEEE Trans. on Commun. vol. 48, pp. 502-513, March 2000. PDF

D. Shiu and J. M. Kahn, "Scalable Layered Space-Time Codes for Wireless Communications: Performance Analysis and Design Criteria", Proc. of IEEE Wireless Commun. and Networking Conf., New Orleans, LA, September 21-24, 1999 (Invited Paper). PDF

D. Shiu and J. M. Kahn, "Layered Space-Time Codes for Wireless Communications using Multiple Transmit Antennas", Proc. of IEEE Intl. Conf. on Commun., Vancouver, B.C., June 6-10, 1999. PDF

C. Chuah, D. Tse, J. M. Kahn and R. A. Valenzuela, "Capacity Scaling in MIMO Wireless Systems Under Corre­lated Fading", IEEE Trans. on Information Theory, vol. 48, pp. 637-650, March 2002. PDF

C. Chuah, G. J. Foschini, R. A. Valenzuela, D. Chizhik, J. Ling and J.M. Kahn, "Capacity Growth of Multi-Element Arrays in Indoor and Outdoor Wireless Channels", Proc. of IEEE Wireless Commun. and Networking Conf., Chicago, IL, Sept. 23-28, 2000. PDF

C. Chuah, D. Tse and J. M. Kahn, "Capacity of Multi-Antenna Array Systems in Indoor Wireless Environment", Proc. of IEEE Global Commun. Conf., Sydney, Australia, November 8-12, 1998. PDF

Return to Joseph M. Kahn's home page.

Last modified: August 12, 2011.