Space-Time Processing for Wireless Communications

Wednesday, August 8, 2001 - 3:20pm - 4:00pm
Keller 3-180
Babak Hassibi (California Institute of Technology)
The use of multiple antennas can, in theory, significantly boost channel capacity as well as lower the probability of error of a wireless communications link. The main signal processing challenge in multi-antenna communications is to devise practical space-time transmission schemes that are simple, yet efficient: simple so that all the processing can be done in real-time, and efficient so that the high rates promised by theory can be attained. In this talk I will describe several recent advances in the design of space-time codes for both quasi-static (as in fixed wireless) and rapidly fading (as in mobile wireless) channels, as well as some new work in the development of efficient (polynomial-time) maximum-likelihood decoding algorithms. I will also attempt to figure out what this all means for wireless networks.