Large System Analysis of Multi-Input/Multi-Output Channels

Wednesday, June 29, 2005 - 4:00pm - 5:00pm
EE/CS 3-180
Michael Honig (Northwestern University)
Performance analysis of wireless communication systems is often facilitated through the use of asymptotic methods. Recent examples include large system analysis of Code-Division Multiple Access (CDMA) with random signatures, and multiple antenna systems with random channels. A key feature of this analysis is application of results on eigenvalue distributions and moments of large random matrices. Those results enable the efficient computation of large system performance measures, such as spectral efficiency and probability of error, which are far more difficult to compute for finite-size systems. The large system results typically give an accurate prediction of the performance of finite-size systems, and offer important insights into system behavior. We will present some recent applications of large system analysis to variants of CDMA and Multi-Input/Multi-Output channels with and without feedback for signature optimization, and to least squares filtering for interference suppression.